Chris McKenzie's Blog

I also dislike the TypeOf in VB.
I wish it was
If obj TypeOf MyClass Then
or
If obj IsTypeOf MyClass Then

Much more natural and easier to remember IMHO.

Agreed, especially your example 2. "If obj IsTypeOf MyClass Then" is very fluid, and is written the way we think it.

Take Outs: The Digital Doggy Bag of Blog Bits for 27 February 2004

Sorry, but that's just wrong. As a matter of fact, it's Windows authentication that's the problem. WIA usually fails because people can't get forward delegation or kerberos working right. Books OnLine for RS is specific about this: Use Standard Logins.

The better choice is to give a collection of reports a SQL login. Let IIS and the Report Service worry about authenticating the user, let SQL Server worry about serving up the data.

This is the message that I got from one of the dev's on SSRS:

"With Standard edition, you would not be able to support a custom user store.
You would have to map your users to Windows accounts/groups."

The only context in which Kent's comments make sense to me is if he's talking about the DataSource object that each report uses to talk to SQL Server.

This may be true, but that's not the subject of my post--I'm talking about assigning end-user browsing rights to various report groups. Again, there is no way to assign those permissions using SQL Server Security.

Kent, please correct me where I'm wrong. Thanks,
Chris

You are right, RS doesn't use SQL Authentication for report access security at all. What you have to remember is that RS is a combination of SQL Server and IIS components. SQL Server supports both Windows and SQL Authentication but IIS supports only Windows Authentication. If you wanted to avoid administering dual groups, you would have to switch from Standard to Windows in your other application and set up RS to use Windows Authentication in report data sources. But as Kent pointed out, there are some issues with forward delegation, a lot of people are having problems if all three components of RS (Report Manager IIS app, Report Server web service and RS SQL Server) are not on the same server.

The only thing I notice is that the control is prefixed as <sdp: and the listitems are pre-fixed as <asp: . I take it this is a custom control where you are inheriting from another control. I haven't tested, but shouldn't the listitems be prefaced by <sdp: ?

That's possible. It isn't an inherited control actually--it's a composite. Normally, it just validates what the user enters into a textbox for required field and datatype--but if the developer enters a list of items instead, it renders a dropdown.

Since the ListItemCollection already exists for the dropdown, I thought it'd be fairly simple to just create one for my control, and populate the dropdown list with it if necessary. It didn't occur to me that there might be namespace issues. I may have to create an SDPListItemCollection instead. I'll try your suggestion first thing in the morning.

Whether it works or not, thanks for the advice.

Chris

You've been Taken Out! Thanks for the good post.

Good list, but how's about one more thing (in case they actually read this): The ability to set permissions on a SQL Server object. I am constantly having to flip back to Enterprise Manager to set execute permissions on stored procedures.

You have been Taken Out! Thanks for the good post.

Why not use a custom validator?

Amrod Telemnar,...aka "hunka, hunka burnin' love".

silly man, lol.

Thanks I just had this error today. Stuck on this problem also. I hope this workaround will solve my problems

Take Outs for 26 March 2004.

I had that similar error too except I am on Windows XP Pro. Thanks for pointing me in the right direction. Looks like the problem lies in permissions.

Take Outs for 2 April 2004

My friend at work just got an MSI MEGA PC ( http://www.msi.com.tw/html/active/megapc/main.html) and I'm thinking about blowing some tax refund money on one. It's a barebones PC but looks like a stereo component. You supply CPU, memory, and motherboard, but these things are under $300 so the whole thing could be $500ish.

Then, once you've got your 600 cd's in digital format you can do anything you could with a CD changer but can also play streaming radio, have extended cd and artist info from CDDB, access the music over a home network, etc., and that doesn't touch on the Tivo possiblities.

Chris, Dino's book on XML Programming is the favorite book on my shelf. (Or I should say, in my car, since I carry it with me in case I have down time out and about.) I particularly enjoyed the serialization chapters and am looking forward to moving in the same direction you describe here. Thanks for the post!

I agree SqlXml + Serialization is very cool :)

I posted the results of some performance tests that I did and you don't take too much of a hit doing the whole Xml/Deserialize/Object thing compared to the standard object hydration methods.

http://blogs.sqlxml.org/bryantlikes/archive/2003/11/18/226.aspx

Also, if you get into deserializing objects with images check out:

http://blogs.sqlxml.org/bryantlikes/archive/2003/11/17/220.aspx

<p>
<a href="http://weblogs.asp.net/taganov">Chris</a> takes <a href="http://weblogs.asp.net/taganov/archive/2004/04/20/116692.aspx">a look at a different way to interact with SQL Server</a> - using sqlxml and .Net xml serialization. I remember seeing this thing for the first time about a year ago, and I too had an "egad !" type moment. Could SQL Server act as an OO DB ?!
</p><p>
After much pondering, then some thinking, a bit of checking, and thinking some more, I came up with <i>an</i> answer ( not <b>the</b> answer, just an answer ). The answer is, unfortunately, no. There's more to bridging the OO-relational chasm than considering a row as a serialized object.
</p><p>
Yes, it <B>is</B> a cool technology. Yes, it does have it's applications. No, it can not serve as the backbone of most information systems. I won't get into the reasons here, but just by applying some reverse logic we can get to the same outcome. ( Actually, while many may argue my technical points against sqlxml at an architectural level, the reverse logic argument is quite solid ).
</p><p>
Sqlxml has been around for a while. Lots of developers know of its existence. Not once has Microsoft released anything more than demo-ware of how to use this technology in production systems as an OO-Relational bridge. No patterns were written about it. In fact, for such a cool technology, it must have been the least hyped ever.
</p><p>
So, if enough people are aware of a tool, and <i>don't</i> use it to solve common problems, <B>and</B> the makers of the tool follow suit, there's a <U>good chance</U> that the technology <i>should</i> not leave the cool camp and head over to the production camp.
</p>

It was my pleasure Chris! cu around!

Chris, also check out Christian's tool here: http://weblogs.asp.net/cweyer/archive/2003/11/21/39070.aspx

It will generate proxy classes with properties instead of fields.

Not true - the idea that anyone in Kerry knows how to use a radio is a dead give away ;-)

I've seen this previously but as USA and CANADA ;)

I've seen the story a few times. Each time it has been the English and the Britania versus an Irish lighthouse and a question of 15 degrees.

It is funny, but its BS.

The originally legend featured the battleship Missouri (the "Mighty Mo"), which was the biggest friggin' thing on the ocean at the time (circa 1950). The Yamato was larger, until it was scuttled after Japan surrendered. Anyway, Steven Covey actually told that story as an object lesson in one of his business books, "Seven Habits of Highly Effective People" (he also thought it was true).

Its also is a little dated in terms of believability... inertial guidance systems, GPS, Loran, triply redundant and tied into navigation computers. They wouldn't have to be told they were steering towards a lighthouse/reef. Also, executive officers are still required to sight stars with a sextant, so they still can navigate the old fashioned way in the event of total shutdown. There was actually a case in WWII where they had to rig a sail from bed sheets, etc. and manually take a badly mauled carrier back to port with no power (I think it was the battle of Midway). That tradition is not forgotten even today. Its one of the things the Navy prides itself on (not just U.S., but all of NATO).

I'm rambling, sorry. I'm sure you could find even more at snopes.com if you're interested.

B

It's an urban myth ...
http://www.snopes.com/military/lighthse.htm

do you think the irish would be in the habit of using the phrase: "your call"?

Chris, this post came up in a Google search for "viewstate dropdownlist composite controls". I am implementing a Reporting Services web-based UI as well, and have been working on a custom composite control like you describe. My sticking point is that I do not see why the dynamic control cannot save its viewstate; when it comes back on a post, it's still the same type (since this can be explicitly stored in ViewState), and so should be able to restore itself. This in particular with values for a list. The dynamically-added ASP server controls do not even show ViewState usage in a page trace, but for dates I use third-party eWorldui.net's date picker, which is using viewstate in the page. Anyway. Thanks for the heads up on what you've seen.

-Tommy McLeod

Great post!

The story has also been used in advertising as you can see in the English spoken video from a Swedish company: http://www.silva.se/kampanj/film/index.htm

About Linux:

two software packages I love:

FirewallBuilder
PoPToP

Firewall Builder is a nice GUI for for creating an maintiang a filewall and uses XML to store the rules.

PoPToP is a PPTP server that is WIndows compatable for auth, compression and encyption.

together I use them on an old pc to be a firewall and vpn solution.

that firewall has been running for nearly 4 years with almost no problems other than some software updates when needed.

well I don't think this directly has to do with the loss of internet but IMHO:

Telnet BAD ! EVIL !
FTP WRONG!

use ssh to replace both of them....

if you do not know ssh is Secure Shell
it is a merger of Telnet and FTP inside a SSL sesion.

much more secure from hackers and network scans.

Telnet and FTP are plain text and if you use them someone can very easly copy your logins and passwords etc....

as for VI Gees.... there are at least 5-10 other editors you can use....
I have no clue why they would require VI other than as punishment.... almost like tellingn us to use EDLIN to write with!

lol,

I'll make a deal with you--if you can guide me through setting up SSH so that I can access it from my Windows XP Laptop, and/or point me at a better editor with syntax highlighting, I'm listening. I'm admittedly a beginner at Linux setup and Administration. I still maintain that Linux is difficult to learn, however. :)

Follow up:

It's not so much that vi is the required editor--it's that I can't really use the IDE for development--they have a build process in place that deals with a hierarchical structure of Makefiles. The source files I provide have to fit within that framework. If I had a better editor with syntax highlighting, I'd use it.

well first bookmark this page:
http://www.openssh.org/

and this page:
http://www.chiark.greenend.org.uk/~sgtatham/putty/

and start here:
http://the.earth.li/~sgtatham/putty/0.54/htmldoc/


sorry but I don't have a detailed process but what I did was:

1) get ssh running
2) generate keys -- followed the docs.
3) copy the keys to the pc.
4) get putty started and feed it the keys
5) make a putty setting for connecting to the other machine.

done...

as far as I recall the process was not hard...
just remember that Linux / UNIX likes to hide some files and folders by naming them with a "." as the first character... so your home folder will have some hidden files and folders one of them has the ssl key you need to copy.

as far as editors my comment is just that there are many others to choose from and IMHO VI is so messy...

also you may want to check out stuff like VNC and there are some commercial X Servers for WIndows .... for that I'd be in a VPN session if you do it over the public internet....

http://www.microimages.com/freestuf/mix/
http://www.starnet.com/
http://www.labtam-inc.com/

an "X Server" is like a RDC CLient....

you can run an X GUI app from the remote Linux box and have a WIndow on your "WIndows" desktop for that app... and do cut and paste between that app and local windows app's.

as you like windows this might be just what you want...

also look at this:
http://x.cygwin.com/

Thanks for all your suggestions Denny. I dug around a little last night and found a much better editor that doesn't really require a big project space---KATE. I thik Kate and I are going to be good friends from now on. It functions more like an intelligent Wordpad.

None of this is over the public internet though. This is all being done behind a private, firewalled network.

I've tried getting stuff like cyqwin x running before, but it's been awhile. I guess I'll dig into that a little bit today then.

Thanks Denny

I have used one of the comercial X's before and it worked very well where I was at that time (about 3-4 years back) I am thinking that I may try to run Cyg this weekend as I have some things I'd like to do....

If I get it statred I'll post some info around.

drop me a message for other ideas ... I can be reached from my domain ... email is

denny at figuerres.com

one other thing .... if you get X and SSH running inside a closed network then you can just edit files localy and send them to the Linux box, some other options:

www.textpad.com is a windows text editor that has color-syntax and is way configuratble
many user built syntax files and stuff...
and it can handle all kinds of Text files Mac,Unix,Dos,Unicode etc... HEX and so on....

I have a licence and just keep getting the updates..... been using it for a long time (4-5 years now)

alsoo.... as you are on a private network don't forget you can use SAMBA to share disks, printers and logins.
so Textpad can open a number of files from a samba share and edit them and save them back witht the right idea of what '\n' means for the file you opened...

TextPad is not super big on macro stuff but does have realy good RegEx for search and replace stuff.
and it has "Rectangles" don't know if you have ever had any editors that do that?
in DOS days there was Brief that did them
say you have a block of init code and you want to grab the varibale names? mark a rect and copy it to a new section and paste!
not the whole lines... just the rect of text you selected.

Cygwin and CYgwin X:

so far one minor problem:

default setup will chose the "Documents and Settings" folder to make your "Home" variable but they have problems with spaces in names of folders....

work around:
1) make a home/username folder
2) edit the /etc/passwd file to point to the new home folder.

that seems to fix a bunch of minor problems I had....

with that chnage I can run the X Server and WindowMaker on an old PII 300 laptop running WIndows 2000 Pro and only 192 megs of ram.
I am getting a fresh copy of Fedora COre 2 to play with so I have not yet tested X forwarding.... ISO of the DVD has downloaded , got to burn it and load it next....

Suggestion from your first code listing... change this line:

Me.EnsureChildControls()

To:

If (HttpContext.Current Is Nothing) Then
CreateChildControls()
Else
EnsureChildControls()
End If

You shouldn't be deriving from Table when you make a composite control. Derive from WebControl and contain a table.

You guys have both said sort of what I was thinking. I was looking for some validation that I hadn't missed something obvious. Thanks!

It seems like it is an issue with the designer, I made small custom designer and got it working (c#).
Are there specific reasons to use WebControl as the base for most/all composites?



using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.Design.WebControls;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

using System.Text;
using System.IO;

namespace TemplatedSampleSite.aspmessageboard.Classes
{

public class TestTableDesigner : TableDesigner
{
override public string GetDesignTimeHtml()
{

Control c= ((Control)Component);
StringWriter sw = new StringWriter();
HtmlTextWriter tw = new HtmlTextWriter(sw);
///Key call to render control.
///The call to base.GetDesignTimeHtml()
/// will return "correct" markup as will sw.ToString();

c.RenderControl(tw);
//return sw.ToString();
return base.GetDesignTimeHtml();
}

}

[Designer(typeof(TestTableDesigner))]
public class TestTable : Table
{
protected override void CreateChildControls()
{

Controls.Clear();
TableRow tr = new TableRow();
TableCell tc = new TableCell();
tr.Cells.Add(tc);
Label label = new Label();
label.Text = "Test HERE";
tc.Controls.Add(label);
this.Rows.Add(tr);
}
protected override void RenderContents(HtmlTextWriter tw)
{
EnsureChildControls();
base.RenderContents(tw);
}
}

}

Hi Andrew,
The Designer is a good idea :). The only problem I forsee with using a table as the basis for a composite control is that the page developer will have access to the "rows" property, and will be able to modify the contents of the control directly.

Thanks this solve my problem

Is there a way for using reporting service in a windows application??
Im a newbie in this, so any answer should do.
Thank, and sorry for my english. Im argentinian.

Thanks

Hi Aldo

The only way to use Reporting Services in an application is to insert a browser window into your app and view the reports through that. That is one of Reporting Services downfalls, it can only be implemented online and must be connected to accordingly.

Hope this answers your question.

Thanks you very much Ryan, you helped me a lot

Hi again,
How can i, on an aplication in execution time, select the records that the report will show?

because once a deployed the report i don't know how to change the sql expresion

Thanks

Hi Aldo

Now to select records during execution, there is only one way that I know of to implement that, and that is to make some paramter queries in the report before you deploy it. This way it will ask the user for some input before the report is created.

Unless you are asking that they actually build the sql expression at runtime, which would be creating an ad hoc report, which I do not believe Reporting Services supports. But otherwise the parameter queries should hopefully be the answer to your question.

Hope this will solve your problem

Yes!! it works great, Thanks again Ryan, you saved me one more time.

Another question: is the a way to print reports other than exporting to another format and then print the exported document?

Thanks again!!!

I agree with you. Linux has a long way to go in order to compete with MS-Products if it comes to usability. This is true for development tools and as well for user stuff. I am starting to love Microsoft. No problems installing drivers, do problems getting the IDE running and tools that seem to work!!!

With Reporting Services the only way to print is to export. The will supposedly be changed in the next version that comes out with SQL Server 2005.

The one thing that really kind of sucks with having to export to print is that the user has to have a browser that is at least HTML 4.0

If they don't, the export feature is disabled, and the only way they can print the report is off the browser which may have less than favourable results.

Hope this helps you once again...

I guess the other thing that should be noted is that when a document is exported in Excel format, it is only compatible with Excel XP and 2003, not Excel 2000. This will supposedly be fixed with the first service pack.

Hi
I have created reports using sql reporting services and have embedded them in webforms, it is working fine and can be accessed on LAN too but every time a user calls the webform, it asks for windows security authentication which I want to eliminate, I tried to check uncheck authuntication is IIS security for the web application, report server and reports virtual directories but it is not helping me to remove the window authentication, pls help to solve this problem.....
Regards

Now with Reporting Services you may be having difficulties with Windows Authentication because that is what it uses to verify its users. I am not positive, but I think you have to turn this off from within the Report Manager. That may work, but I am not positive.

Of course when you turn this off, you will no longer have security on your reports.

Hope this helps you

When I was installing the reporting services I got some stupid error saying reporting services can not continue installing, send report to microsoft. when I checked the log file it said something like this..

---------------------------------

Property(C): RSTarget.3882F579_1BCB_4C44_991C_060D38C9C09D = C:\Program Files\Microsoft SQL Server\MSSQL\Reporting Services\Samples\
Property(C): DataBases.3882F579_1BCB_4C44_991C_060D38C9C09D = C:\Program Files\Microsoft SQL Server\MSSQL\Reporting Services\Samples\Databases\
Property(C): SamplesDB1 = AdventureWorks2000
Property(C): CostingComplete = 1
Property(C): OutOfDiskSpace = 0
Property(C): OutOfNoRbDiskSpace = 0
Property(C): PrimaryVolumeSpaceAvailable = 0
Property(C): PrimaryVolumeSpaceRequired = 0
Property(C): PrimaryVolumeSpaceRemaining = 0
Property(C): _FeatDescription = Report Server
Property(C): _DefaultInstance = Installed
Property(C): SQL_SHOWLIC = 1
Property(C): PERSEAT = 1
Property(C): RSAutoStart = 1
Property(C): _Service = RS
Property(C): Asp_Net_Accout_For_GUI_Display = VASUDESKPRO\ASPNET
Property(C): _SingleText = Report Server
Property(C): SqlServices = 1
Property(C): WizardDialog = CustomSelectionDlg
Property(C): DisableBack = WelcomeDlg
Property(C): RSTempDatabaseName = ReportServerTempDB
=== Logging stopped: 6/1/2004 15:52:21 ===
MSI (c) (90:3C): Note: 1: 1708
MSI (c) (90:3C): Product: Microsoft SQL Server 2000 Reporting Services Enterprise Edition -- Installation failed.

MSI (c) (90:3C): Failed to grab execution mutex. System error 258.
MSI (c) (90:3C): Install in progress and no UI to display Retry/Cancel. Returning ERROR_INSTALL_ALREADY_RUNNING.
MSI (c) (90:3C): Server locked. Will skip uninstalled package cleanup, and allow locking install to perform cleanup
MSI (c) (90:3C): MainEngineThread is returning 1602
--------------------------------

any suggestions ?

Hi...
Could you explain me how to configure the Report server for email delivery?

Thank you, one more time Ryan

You have to make sure that the server is has a connection to a SMTP mail server, this can be on the same machine through IIS I believe. Once you have that connection, you have to set up the report server to use the mail server for e-mail. Now I know you can do this during install, but since I do not have a SMTP server hooked to my testing box I skipped that step. Now I was trying to find the way to fix it, but can't seem to so far. I think it may be quicker just to uninstall and reinstall Reporting Services and point at the mail server during install.

Hope this helps out...

Thanks man...

mmmm... you say that you haven't tried Email delivery... well I'll ask you anyway.

I manage to make an email subcription, but if I try to make it send a web file, it respond me with an error configuration message. But if I use the link option only it works just fine.

Hmmm... I have heard of that issue popping up around some of the other forums, though I can't remember where exactly. What is the error you are getting exactly? Is it when you try to retrieve the report through your email client or is it when you are actually sending the report that it occurs?

Oh, and what email client are you using?

The error message is: Failure sending mail: The Report Server has encountered a configuration error; more details in the log files

I see it on the Report Administrator Page (more exactly in the Subscription Page). The mail isn't delivered. The error happends when de report server try to send it.

I'm using Outlook Express.

Hey Aldo

Try out this site.. they have a couple of solutions depending on the error thrown, maybe one of these can help you out.

http://www.google.com/groups?q=authz+group:microsoft.public.sqlserver.reportingsvcs&hl=en&lr=&ie=UTF-8&selm=ODE70opMEHA.268%40TK2MSFTNGP11.phx.gbl&rnum=4

Hope it works for ya

I just ran into the IS_MEMBER/db_owner problem myself. Thanks for letting me know I'm not crazy. :P

Unfortunately, I need to allow users with db_owner affiliation use the app I'm developing, so I can't use your "good fix" in its pure form. Probably going to go w/ something like:

if IS_MEMBER('FP_Admin') or IS_MEMBER('db_owner')
(
-- some stuff
)

Does that look like the best workaround to you?

nate

That's the only work around that I can think of in your case. I'm glad you found my post helpful :)

Chris

Every socket has four pieces of information to make it unique: server IP address, server port, client IP address, client port. If I look at netstat right now, I see IE opened two connections to your web server on port 80, one from port 4766, and one from port 4767. I have two connections to the same port on your server, but since the client ports are different the communication works. Likewise, I’m sure weblogs.asp.net has many connections opened on port 80, but each one will come from a different client ip / client port combination.

You can only listen on a port from one socket at a time, but the Accept method will return a new instance of the Socket class for each client.

Am I making any sense?

One other thing to note is that the application has to be multithreaded in order to handle multiple connections. You can do something as dirty as accepting the connection and forking, then having the child process deal with the new connection and the parent process go back to waiting for a new connection. Or, you could use actual threads for better memory and process management. But basically, a single instance of the application running can only do one thing at a time, so if it is working with the new client, it can't be listening for new connections, so in order to support multiple connections, you always need to have one process listening.

As far as threading in .NET, I'm not sure. My experience in socket programming and threading is from the Unix realm.

To further clarify Ken's idea: start with your main thread. The entire purpose of this main thread is to listen on the incoming port. As soon as a request arrives, fire off another worker thread to do process the request. This is typically a very fast an efficient action so the main thread can immediately get back to listening for further requests. If you can, keep your worker threads as autonomous as possible; interact with the main thread as little as possible. Depending on your bandwidth requirements, it may be necessary to increase process priority or, for very high throughput, move to an SMP system. There are plenty of examples out there on multithreading using .NET. Good luck.

Thanks guys. That was exactly the information I'm looking for. I just ordered the multi-threading book, so by the time I need this to work with multiple connections, I'll have it. Now at least I know that what I need to do can be done--and as NBC so often reminds us <grin> "Knowing is half the battle!"

I don't think you should use it at all - if you have a long running slow process you should run it on it's own thread.

DoEvents simply allows a chance for the windows message pump to process messages that may be coming in during a long-running loop.

It's not really a good idea to use it (it can cause re-entrancy issues) and it's pretty much unnecessary since .NET supports multi-threading.

Since console apps don't have a windows message pump running, DoEvents is useless in that environment.

I do get a behavior difference if I use it in a Console environment. I have a console app that chuncks through a 30,000+ record file and prints the formatted contents to the console output window. If I run the app without DoEvents(), my other applications slow down. Redrawing takes forever. If I add DoEvents() to the read loop, then I get better behavior out of my other windows.

I'm not entirely sure how multi-threading the loop would change the original behavior of causing long redraw times on my other apps.

What am I missing?

Thanks

As Patrick Steele said, DoEvents should not be used in a console app. If you have a CPU-bound console app like the example you gave, you can improve responsiveness of other apps by calling System.Threading.Thread.Sleep() in your loop. A short timeout is probably enough: just to relinquish your timeslice and let other processes in.

Maybe DoEvents internally calls Thread.Sleep(0) which would explain why it makes a difference, but it's inappropriate in a console app.

You know--I'm betting that DoEvents() does call Thread.Sleep() internally. Thanks Joe!

I imagine that this is the default behaviour so that people who are server admin (and therefore members of dbo) don't have access to the data (well, at least not from the front-end).

Thanks for your post though, as I've been puzzling over this one too.

My application is a internet web application. Data source and report server is on separate machine.

How to make my report secure if I use URL access?

glad you enjoyed it!!

"I guess I expected to be able to allow anonymous access to the Report Manager via IIS, and have the Report Manager query the user for SQL Server credentials when they access the reports."

This may be a stupid question, but in the Data Source menu of Report Manager, if I choose

Connect Using:
The credentials supplied by the user running the report

then what credentials would these be? SQL Server credentials or Windows authentication?

If you use "The credentials supplied by the user running the report," it's SQL Security. When you use this model, the username and password is supplied to the connection string by the user. You can use SQL Server Security on the reports themselves, but not for <i>access</i> to the reports or the Report Manager in general.

Thank you.

Now I have another dumb problem. My IIS settings are currently

Enable anonymous access
User Name: <computername>\IUSR_<computername>
Password:
Allow IIS to control password: disabled
Integrated Windows authentication: enabled
Basic authentication: enabled

And i'm using Windows NT Integrated security on the reports.

When I log on to http://localhost/reports everything works fine, but when I log onto http://<localipaddress>/reports I can't do anything. There's no My Reports or anything, just "Home / My subscriptions / Help".

If I try http://<localipaddress>/reportserver I get the following error message:

The permissions granted to user 'TOON\Guest' are insufficient for performing this operation. (rsAccessDenied) Get Online Help

Shouldn't it be saying something like "The permissions granted to user 'TOON\IUSR_TOON' are insufficient"?

If I Allow IIS to control password and disable Integrated Windows authentication, I get My Reports both in localhost and IP address, but I can't access the reports themselves. I get an error message about not having permissions to execute the queries.

Any idea how I should go about this?

What about this:

public static DataTable ToDT(Array arr)
{
DataTable dt = new DataTable();
if ( arr.Length>0 )
{
object obj = arr.GetValue(0);
Type objType = obj.GetType();
dt.TableName = objType.ToString();
FieldInfo[] fis = objType.GetFields();

for ( int i=0; i<fis.Length; i++ )
{
dt.Columns.Add( fis[i].Name, fis[i].GetType() );
}

for ( int i=0; i<arr.Length; i++ )
{
DataRow dr = dt.NewRow();
obj = arr.GetValue(i);
for ( int j=0; j<fis.Length; j++ )
{
dr[fis[j].Name] = fis[j].GetValue(obj);
}
dt.Rows.Add(dr);
}

}
return dt;
}

Visio can display cardinality and crows feet, by changing the settings. Go to Database -> Options -> Document -> Relationship.

There's a fair amount in Visio that I thought should be standard, but you actually need to configure. Relationships (cardinality, crows feet, etc.) as well as displaying data types. In the same place to configure crows feet, you can select whether you want to show physical, portable or both data types. I always choose physical, but I thought that any ERD should, by default, display crows feet and data types.

Some of the features you mention are in ApexSQLEdit (formerly MSSQLEd) - http://www.mssqled.com/DesktopDefault.aspx?tabid=28 - very good tool, and if some of the features they've introduced could be moved back to the VS IDE, I too would be a very happy camper...

I feel you homey. For all of our Linux-type moneys out there - "don't be hating".

Me, I like it when things work. Period. enough said.

I use Suse 9.1 for quite a while now. OK, I already got eperience with earlier versions, and I think that it is a step forward. Indeed I agree that there is more available for windows.

The problem is that linux, or more specifically open source software, is refused a fair chance. One of the reasons that Windows is easier is that it is supported by companies who only develop windows drivers. Linux is completely (deliberately, forced?) ignored and computers are only sold with windows (and you pay heaps for it, tough if you already have a windows version). Why does a company make Win/Mac/DOS drivers, but not linux? I bet that there are more linux than DOS users around. Why, in PC Magazine, is Thunderbird voted as best free email program, but is Outlook Express listed as first choice in the overview? Why can't I buy a laptop without Windows preinstalled even if I want to use linux only? Why do magazines publish many Word tips&tricks, but not for Openoffice? These are little things, but they influence people.

Everyone should use the operating system he/she likes, and should not he hindered by unfair trading practises. Not all linux users are religious MS haters.

I don't agree with your analysis. Nobody is refusing Linux a fair chance. I certainly didn't when I was starting my development career. I didn't know anything about the Linux vs. Microsoft issue 4 1/2 years ago. My negative opinion of Linux comes from using and developing for Linux. Suse 9.1 is better--but there's nothing I can do in Suse that I couldn't do in Win98.

This business about not being able to buy a computer without windows on it is rubbish too. You can buy hardware-only systems all over the web. Many stores don't sell hardware-only systems because most customers won't buy a PC without an OS installed. The OS of choice is currently windows.

As to your questions for PC Magazine, I suggest you take those up with PC Magazine.

As to the reason that magazines publish many Word tips & tricks and not OpenOffice--it's simple--Word is widely used and the magazine is trying to sell copies of its magazine. It doesn't take a marketing genius to figure out that a magazine is going to try to print articles that are relevant to most of its target demographic, and that this policy will result in increased magazine sales.

The comments about unfair trading practices are barely worth comment, but I'll give you the benefit of the doubt that you are not a religious MS hater. Microsoft hasn't done anything that thousands of other companies don't do every day--except be better at it than everyone else.

Perhaps LC.DataTextField and LC.DataValueField are the same. So I use this modified function:

public static DataTable ArrayToDataTable(System.Array arr, ListControl LC) {
DataTable DT = new DataTable();
DT.Columns.Add(LC.DataTextField);
if (LC.DataTextField != LC.DataValueField)
DT.Columns.Add(LC.DataValueField);

Type T = arr.GetType().GetElementType();

foreach(object o in arr) {
DataRow DR = DT.NewRow();
if (LC.DataTextField.Length > 0)
DR[LC.DataTextField] = GetFieldOrPropertyValue(o, LC.DataTextField);
if (LC.DataValueField.Length > 0 && LC.DataTextField != LC.DataValueField)
DR[LC.DataValueField] = GetFieldOrPropertyValue(o, LC.DataValueField);
DT.Rows.Add(DR);
}

return DT;
}

Hi all,
I've found this forum very helpful, so thanks for that.

My question is: Is there a way to print the reports without having to export them? Maybe with an extension or something like that... I've been trying with the Printer delivery sample extension but I can't get it to work.

Thanks in advance for any suggestion!!

(sorry for the english, I'm from uruguay... :) )

Yes,
check out this site

http://www.csharphelp.com/archives3/archive545.html

PrimeQuote Insurance Services
PrimeQuote.com

Now, Here is my ques, I am using web services to access reporting services. Everything works just fine but when I click on Export, I get file not found error msg!

John

Now, Here is my ques, I am using web services to access reporting services. Everything works just fine but when I click on Export, I get file not found error msg!

http://www.primquote.com

1.) VS source control integration stinks, IMHO. Source Safe is terrible and most 3rd party integrations are even worse. I like Database projects, but avoid SCC like the plague.

2.) Is this a joke?

3.) Again, you're killing me. I did both Java web and Swing development for several years.

4.) Right now we use VS.NET setup projects, but they're pretty weak. We're torn because MSI is a complicated mess (but very powerful) and WiX is incomprehensible. Perhaps we'll break down and buy InstallShield or Wise or just use Nullsoft's installer

5.) I haven't used PVCS, but I've heard it's horrible. It can't be any worse than VSS, that's for sure. Subversion is the way to go, no doubt. I've used several other source control systems and subversion beats them all bar none.

6.) For the most part. I wish I could stick to TDD more, but it's hard to put into practice the ideals. There's just not enough concrete examples and methodologies.

We use code coverage tools, we unit test heavily (mostly after a new feature is added), we're using continuous integration, we're trying to get FxCop integrated, but it's going slowly.

1. Nope, long live Query Analyzer and sql scripts!

2. My only experience with Java is from Starbucks.

3. See above.

4. I used the VS.NET deployment project with the .NET boot strapper and MDAC components included. I admit MS made it pretty easy but my installation is pretty vanilla so I don't know how I would have fared beyond the basics.

5. Eh? The only source control I've ever tried is Subversion. Pretty spiffy.

6. No I'm a one man shop. Although I am constantly trying to force my self to get into TDD and automated builds.

1. No, I use an O/R mapper :)
2. Java is superior in server side technology, like enterprise wide systems, not on the client.
3. Apples and oranges comparison.
4. Build my own.
5. Don't now perforce, I use subversion, which is amazing.
6. Yes. :)

Questions 2 & 3 are no joke--I haven't used java for windows app development, nor for web development. I've been told that there's a java equivalent of ASP .NET--so I'm wondering how it compares.

1. No, I create/generate my own scripts and manually place them in source control.
2. Java sucks for Windows client development -- its doable, but obviously second-rate.
3. JSP is nearly a "clone" of ASP, and its usually playing catch-up in most cases.
4. I actually found Wise too limited, and have found the built-in tools adequate. Of course, a professional installation would require more, along with a dedicated person.
5. PVCS is very outdated -- you should be comparing VSS to Vault, Subversion, Perforce, and CVS -- all of which beat VSS by far. That said, I don't use the integration with VS, since I prefer manually control.
6. Not really -- and I can't say I've ever personally seen any place that did.

1. I've used the database project on a smaller project, but on in my current group, we do not; scripts are generated and checked into VSS by a dba group. We have, though, recently turned on VSS for stored procedures through VS; too soon to say how well this will help manage changes there.

6. I think my current group is doing a good job in being aware of what needs improvement and adapting.

Hi. My answer to your first question is no. I know you have to use the GAC which is fairly different to the desktop but I have not used it myself.

Your second question needs to be more specific but "yes" I have been able to do this. Do you mean binary reuse or codebase reuse? Either way the question comes up often enough on the ng and it deserves a lengthy answer so I decided to blog about it in two parts :-) The first part is up here: http://www.zen13120.zen.co.uk/Blog/2004/09/retargetable-256.html . The second part will follow soon...

1) Yes we actually do, but with a lot of manual process added to manage changes from one version of the application (and db changes) to another.

2) I used to develop Java windows apps before .NET. After .NET, why would I torture myself. .NET is by far better in this area.

3) It is hard to say, just because I don't think you can compare ASP.NET to any other web development methodology. (My favorite is PHP anyways :) )

4) I integrate custom build tool and InstallShield.

5) I have never used PVCS. I use WinCVS at home, cvs on linux web dev box that i have, and VSS at work. Both tools, cvs and vss have their own problems and advantages. If I would have to choose one, it still would be cvs.

6) It varies from team to team depending on personel. We have our own dev standards, global components, in-house utilities. However a lot of is lacking in xp area of developing such as unit testing and peer reviews. I think I am the only one here that uses NUnit which is very very sad. Design methodologies are pretty well defined and the process for it is also in place.

I have created an excel file with the appropriate assembly which works fine if the assembly is located anywhere on my PC but not if the assembly is on a network with the excel file located locally. I have gone through everything I can think of, including all the solutions you have listed, but I still get the same error. Any ideas????

1) The permission set for an assembly must be set up under Machine->All Code->LocalIntranet_Zone.

2) The _AssemblyLocation0 Document property must be give the fully qualified network path to the Assembly.

You Should be able to run caspol.exe -rsg <Full path to Assembly> and see if there is some other permission set that is keeping the code from executing.

Caspol.exe is located at <system>\Microsoft.NET\Framework\v1.1.4322.

If this doesn't work, reply to this comment with more details about your project.

Hi,
I'm interested. Please send me an invite to vinzal@ yahoo.com (no spaces).
Thanks,
Vince

Hi,

I'm interested, please send me an invite to

andy@andywu.info

Thanks,
-Andy

I'm interested

wedgebert@hotmail.com

Thank you,
Will

I have 6 to give away.

Send email to frank at franksworld dot com

Regards,
Frank

i got 5 invites if anyone's interested

http://blog.dreamprojections.com/archive/2004/10/08/238.aspx

Good question, supply and demand? So far as I know, the IPod is about as small as you can get - and this is no doubt one of the reasons for it's popularity (oh, and the battery *almost* lasts a whole work day). I have no doubt that someone will make a PDA that small and with that battery life (which would make it a *consumer* level product) - give it time!

I'm interested, Please send me an invite to:

gino@editoraviena.com.br


Thanks,
gino

I am having a similar problem with a WORD template, and have addressed both the assembly name and the caspol issues. Still I get the error. Any other ideas?

Thanks in advance.

Agree.

Some bugs take a long time to reproduce, but are caused by very simple syntax errors. Some developers may consider it worthwhile to stop the program, fix the error, rebuild, and step through the 15 steps to recreate the error condition. I don't. Let me do it the easy way.

Hi,
I would realy love to have an Gmail invite. If I can help/trade with something else, just let me know, but if you don't want anything anyway, i still would love the invite!
Thanks in advance
Jos
bsojbsoj@zonnet.nl

Thanks! This script is exactly what I was looking for.

Chris, sorry you were having a hard time with security; unfortunately if it is easy for you to get your code to run, it will be easy for attackers to get their code to run.

You might want to read two of my blogs:

http://weblogs.asp.net/ptorr/archive/2003/09/25/56217.aspx

and

http://weblogs.asp.net/ptorr/archive/2004/10/29/249366.aspx

The Office Pro requirement is a marketing thing. nothing I can do about that; sorry :-(

"the document should prompt the user [that the code isn't trusted], warn them of the dangers of running untrusted code, ask if the the assembly should be granted FullTrust [...] and then set the appropriate security policy automatically."

Great in theory (that's what VBA's "Medium" security mode does) but horrible in practice. Outlook warned users about the dangers of opening VBS or SCR or EXE attachments, but we still had all those e-mail viruses. Now all those extensions are just blocked by Outlook.

IE used to warn people before auto-installing ActiveX controls; now you have the "Gold Bar" experience (which is an interesting solution when combined with Authenticode signed code, but not a good enough mechanism by itself).

Unfortunately, users just don't make good security decisions, especially when it is interrupting their workflow and they just want to "get their job done." Modal prompting is a BAD idea when it comes to security.

As for the setup project idea... yes, that is one way to do it, although unfortunately we don't ship with a setup project out-of-the-box. (One drawback to local installs is that you can no longer update the assembly in-place if you find a bug).

dOOM and gameplay are the two words that shouldnt be put together in one sentence. Have a look at Half-Life 2 :)

Ugh. I hate it when people schedule projects to complete during decmber. Nothing like stress to help wit the holidays.

Sissy :-/

I had problems with PVCS changing the source control provider. The symtoms were that VS2003 would lock up anytime we tried to access VSS. New installations of VSS would not correct the issue. There is a registry key that we had to manually edit to make VS think it was no longer connected to PVCS.

I know this probably does not solve your problem, however it may indicate that there is some incompatibility having VSS and PVCS installed on the same machine. I would try removing both, cleaning up the registry, and installing only PVCS to see if that works any better.

I'm using Version 8.0 of the PVCS (Now Merant, Now whoever) client, so I can't really contribute to much to your particular problem.

But the two working side by side do work.

Were using this utility here for vss integration
http://www.codeproject.com/tools/sccswitcher.asp

And to do the migration we just checked everything out of vss and added it to PVCS. Not ideal but we wanted to re-arrange some stuff before hand anyway.

GL.

check out the sql packager tool @ http://www.red-gate.com/sql/sql_packager.htm , it might help you with the sql aspects. Installshields fairly easy to get to grips with so you might just be able to get it to kick off the sql package at the end.

Forget about importing the projects. Part of the problem lies with SourceSafe and part lies with VM. Unless it is a very small project and that you have absolutely no errors (rarely a true staement)in the SourceSafe database it just will not work. I'm in the process of doing the same as you and what I do is take a latest version of a project from SourceSafe and start a new VM project with it. Maintain the SourceSafe archives for history but everything from this point forward is in VM. Another advantage to this is that occasionaly you will find that a change in folder structure can benefit the project. This is the time to do that. Also don't even bother with ide integration. You are much better off to use VM ide to check in and out. Doing things like branching and merging is almost impossible if you try and do them in Studio.

BTW upgrade to version 8 as soon as you can. Stability much improved and speed much improved. We have the server set up which improves security. The only person that can actually see the project databases directly is me. Developers interact with VM server. You don't have to bother with folder access rights at all. Mucho better....

Be glad to help out with questions if you have any at jlsglynn at gmail.com

Good luck

ok

the only free place is census, i built a branch locator (sample) with that free db.

The best deal I found anywhere was:

http://www.zipcodedownload.com/

I don't believe it is in the public domain. But it should be.

has anybody checked with the US Post office?

www.usps.com

Eric is correct - all zipcodes are freely available from the USPS site...

http://www.cfdynamics.com/zipbase/

Pretty complete... carries the long/lat values too to do all sorts of fun stuff.

Acutally, USPS charges for their ZipCodes. You can look up a city/state from a single zipcode, but you cannot get a list of all zipcodes and their associated city/state.

The link posted by weston weems seems to be the best one. Thanks weston!

Maybe we should email our senators and stuff. I just emailed all of mine. Really can't this informatoin be on the firstgov.gov.

Census zip code files

Here is the 1999 version
http://www.census.gov/geo/www/tiger/zip1999.html

Here is what they offer now:
http://www.census.gov/geo/ZCTA/zcta.html

start looking at the map and make your own

Try WiX

http://sourceforge.net/projects/wix/

http://blogs.msdn.com/robmen/archive/2004/04/05/107709.aspx

http://www.ondotnet.com/pub/a/dotnet/2004/04/19/wix.html

What the hell is that? I caught this clip several days ago and thought I'd see a bit of it again. When I clicked on the link in your post it was some message about "If you're going to fucking watch my shit, then at least take the fucking time to /msg me before feeding off my humor and shitty animation." What an asshole. (Not you, this...animator.)

Almost all the developments in Redmond are based on C#/C++... VB sounds like a toy language there..

Almost all the developments in Redmond are based on C#/C++... VB sounds like a toy language there..

Very Good question....

IMHO there is one issue that it the real "Kikker"

does the guy have a background where he "Knows" about low level stuff?

most C / C++ folks have done at least some assembly lang. work and have had to deal with stuff like raw pointers and memory mapping ( transform a data structure to an in-memory layout) and other related stuff.

if you have that you can take any language to the "Edge" but if all you have done was Word and Access and VB 1-6 then you may not "Get" some of the really deep stuff....

also a *LOT* (IMHO) of VB coders would not have a clue how to write some of the classic stuff
like
Linked List
Tree
QSort
Shell Sort
Qeues (spelling! I know thats wrong)
or other stuff like that...

*NOT* to say many VB'ers do not know this....
just that a lot do not and that may be part of the
differece in the "culture" of C Vs VB that sometimes tends to ask for a C'ish person.

BTW: I too have done many kinds of coding....
I like VB but like you I can do whatever it takes to make it work... :-)

I'm not trying to start a flame war here. Visual Basic is not taken seriously by anyone than other Visual Basic Programmers. I think its a great language and the criticism is unjust but thats the way it is.

Denny has a couple of items on his "low level" list that I have not covered yet--the QSort and Shell Sort. I've done binary and bubble sorts (bubble sort only as a programming exercise!). I'd have to look up Shell- and Q- sort. Linked-lists, Trees--been there, done that, bought the T-shirt.

I haven't done any Assembler though. I haven't needed to yet. I'm not against coding in C#, I just don't see why a syntactic preference should affect whether or not I'm considered for a position.

My solution was to learn c#. I got a book and breezed through it in about a week. I can see why people like c# better, it does some things that vb.net can't and has a cleaner structure to it.

Bottom line is, if you are a reasonably good programmer in vb.net or c# there is no reason you can't learn the other very,very quickly - assuming you truly know OOP and the CLR and FCL.

I decided that even though I knew the bias against vb.net was unfair, simply knowing that fact doesn't help me - it was either change everyone's opinion or add another tool to my skillset. Guess which one was easier.

p.s. My favorite lang is still vb.net and i'm lucky enough to have an employer who shares that view.

Thanks for your comments Nathan--I'm in agreement with you. I *have* learned C#--it's just that on my resume I can show about a year of C# experience relative to 3 years VB .NET experience. But still, you're right.

I think it's more a function of audience. VB.net is more focused at the non-professional, non-enterprise programmer where as VC# is, especially in the 2005 versions.

However, in .Net programing learning the framework in more important than a particular language. Once you get enough of the concepts down, moving between the two is not difficult. I started in VB.net and I'm moving to C# for the VS2005 time frame. I might limit C# to class librarys though. VB seems to be very friendly towards UI creation.

They probably have to pick one or the other. You can't have a team of people working together on something where some know only C# and others only know VB.NET (even though there are tools to translate one language to the other). It's a shame, because in many cases people would be a lot more productive using VB or some other easy language. I really can't think of one reason where you would *need* to code in C# instead of something easier to use. Why does DirectX only have C# sample code for example? Just because C# looks more like C++ than VB, doesn't mean it is the "fastest" or most powerful option.

I don't think that argument flies either--the .NET framework makes for an extremely small overhead to move between languages--especially if the person has C or C++ under belt. I get the bit about picking one over the other--but when hiring perspective employees, I don't think that OOP VB .NET'ers like myself should be dismissed because we only "have a year in C#."

Doesn't anyone use J#? I use J# sometimes for a quick test harness. I prefer ; and {}s, so I mainly do c#, but people who really understand the .Net framework know that language doesn't matter as long as you make your code CLS compliant. If I was a great VB.Net developer, I wouldn't have a problem finding a job, and if I WAS interviewing, and the interviewer was biased like that because of his little situation I like to call "being a complete moron", I wouldn't want to work for that company. It would be a frustrating work environment of decisions handed down that are based on zero knowledge of the domain.

Oh, it's also capitalism. What if you programmed in COBOL.Net and could write any OO app better than any c# programmer. You could be an independent contractor, but if the market is there for apps with the name "COBOL" in them, then you have a problem. The market may shift for weird reasons or no reason at all. What about later when c omega comes out?

I think with .Net, I don't call my self a c# or vb.net developer. I develop apps with the .Net Framework to be run on windows. I can use several languages. Then when a project comes, I select the language or languages to use at that time. That may actually make someone more marketable if they refrain from labeling themselves either way. What about all the VB shops that don't want to hire a developer if he has mostly c# experience on his resume.

I think it's mainly because Microsoft comes from a C++ background, and these teams feel more comfortable moving to C# (I know, the product I'm working on in written almost entirely in C#) because the language constructs are similar. But, there are definitely teams at Microsoft that use VB for development.

As for using multiple languages, even though that's supported in .NET, it's hard to have multiple languages within an application. The learnabilty and maintainability of the application goes down if you have to go between two lanugages.

good tester:
http://regexlib.com/RETester.aspx

This is also a hack, but here is a link to the technique I use: http://weblogs.asp.net/josh.robinson/archive/2004/12/20/327381.aspx

Ah... to read Design Patterns for the first time...again. Enjoy it, it only comes once...

Good experience on TDD. I think TDD need better developer because if a developer can not isolate or design the application well this method will not work as expected well.

Thanks for the write up. I've passed it on to my team. And thanks for the entry about improvements as well. <g>

yag
Group Manager, VS Data

Hi SpiderMan,

I think you're confusing cause and effect here. It's not that you need better developers to do TDD -- TDD makes developers better.

At least that's my experience. My bugcount's plummetted, my code's become easier to change, and some features I've never dreamed of, became possible.

Anyway... just try it out.

I believe SQL Server 2005 is set to address some of these issues in a better way (from what I have seen so far).

In the meantime, if you look at, for example, the stored procedure sp_addlogin in the Master database, you will see it immediately checks if the user calling the procedure is a member of the SQL Server role "dbo". So, this is a restriction placed with inside the procedure which you can't get around short of changing the default Master procedures (not advisable).

This sounds like a good idea, i am however having problems visualizing your scheme. Is it possible to maybe share a diagram?

I'll try to do that soon. :-)

You say that the UI can and should do its own validation of Person...doesn't this duplicate some of the validation logic? If your "policy" for person becomes less strict that what the UI is enforcing, wouldn't this prevent "valid" (according to policy) data being entered.

Maybe I don't fully understand the subtleties of what you're doing but it doesn't sound that different to a normal 3-tiered system. The only slightly different spin is that instead of the "business tier" AKA "policy" doing the validation and then calling down into the data tier you're passing the "policy" down to the data access tier.

The idea of IPerson having a property called IsACompany strikes me as a little odd too :-)

Looking for an other name for IPerson? How about IParty. I read a book (The Data Model Resource Book by Silversion, Inmon and Graziano) they talk about Party, which either is a Organization or Person. I am not native English, but I am using this from time to time. What do you think?

Regarding the UI doing its own validation:
I'm not actually suggesting anything new by saying that "the UI can and should do its own validation." We do this all the time. We require that entries into textboxes format to a date, or are numeric, or whatnot. We enable and disable groups of controls based on values set in other places--all in an attempt to visually represent the Business Rules.

There are two related ideas I'm exploring here :

1) The User Interface is just another representation of the Business Object and associated rules. If the UI implements the Interface of the Object it is intended to edit, then it becomes just another instance of that object and can be passed around through the system as such.

2) Point 1) requires that All Business Objects be made available as Interfaces. This means that some other mechanism is necessary for enforcing the Business Rules, which implies a separate rules-validation layer.

The immediate (and lesser) advantage to the UI-is-just-another-Interface approach is the ease of interacting with the rest of the system.

A secondary (and much more important) advantage is the separation of Business Rules from the Objects they apply to. In the example I gave, I did the validation just prior to the save operation. At a minimum it should be done there. But there's no reason why the FACTORY Object couldn't make a validation routine available to external callers.

To see the benefit of this approach, imagine that you had a list of IPersons attached to some account in your system. The UI Developer builds a basic list-managment interface, does the basic type-checking validation, and sends the list through the FACTORY for saving. All is well with the world.

Now let's say that a new requirement is added to the system: Only IPersons of a certain type are allowed to be attached to certain types of accounts. The Validation object can be modified to check for this condition accordingly, and raise the appropriate event with a corresponding descriptive message as to why validation failed. Since this is a new requirement, I would add a placeholder for it to the data store and make sure its state is enabled. Then I would load the rule as part of initializing the application. If the rule should ever be relaxed, I don't have to change the validation object again--I just have to change the value stored in the DataStore for the rule.

As long as the UI developer listens for the ValidationFailed event, all he has to do is pass the messages along to the end user. No additional code is required on his part.

Of course, the UI developer could modify the client to enforce the new validation. He could filter the list of availabe IPersons so that only valid ones could be added. This would save the end-user the trouble of building a long list of IPersons only to have the save rejected because 20 of them fail validation. A cleaner, more user-friendly UI is why he should do his own validation. If he doesn't get to it right away, the rule is still enforced, and the application doesn't break.

"If your "policy" for person becomes less strict that what the UI is enforcing, wouldn't this prevent "valid" (according to policy) data being entered."
Good point. Well taken. I suppose that the UI developer will need programmatic access to what rules there are in the system, and whether they're being enforced or not. That way he can enable/disable his required-field validators and whatnot accordingly. I'm going to chew on this idea some more. Very good feedback. Thanks.

There is a third benefit to this separation that I just thought of: If you're using WebServices, it would be difficult to enforce the Business Rules in the Business Objects themselves because functions cannot be sent along with the objects. WebServices sort of require that you have some kind of separate validation mechanism. If you're app is built this way from the ground up, then you're poised to take advantage of webservices with little or no modification to your code.

I stress that I am still exploring this approach. I'm not married to it, but I'm testing it out right now and it seems to work well and be fairly easy to implement. Thanks again for the feedback.

I would just seperate the two entities because they really don't have a relationship that requires inheritance. A person can work for a company, but really, a person is not a company. Even with freelance developers, the company name may be their name, but it is a seperate entity of themselves.

Other than that, I would avoid putting the validation logic into the data access layer, it should only be concerned with doing the data work, nothing else.

The business rules / policy should all be kept in the tier above data access. I find it helpful to expose data validation to the UI tier, so I use something like this:

<code>
public interface IEntityValidator {
bool Validate(object value);
IEntityValidationErrorCollection Errors { get; }
}

public sealed class EntityValidatorAttribute : Attribute {
public EntityValidatorAttribute(Type validatorType) { ... }
}

public sealed class EntityValidatorFactory {
public IEntityValidator GetValidator(Type entityType) { ... }
}

public sealed class EntityValidationException : Exception {
public object Target { get { ... } }
public IEntityValidationErrorCollection Errors { get { ... } }
}

[EntityValidator(typeof(PersonValidator))]
public abstract class Person { ... }

public sealed class PersonValidator : IEntityValidator { ... }
</code>

In some cases you may need more than one validator per entity, so you just change how the factory returns a validator and the definition of a validator to be plural and contain many IEntityValidator instances.

This method creates a visible link between the entity object and the validator(s) used to perform validation of an object. It also allows someone other than the service tier to gain access to validation rules. So for instance, you could populate your objects and do a test validation on them if you really needed to.

I hope that isn't too much, but it is creating this link between the objects that makes using them so much easier ... it also makes changing what validators are run against an object.

Btw, I'm not fond of interfaces for entity definitions, abstract classes make it much easier to smooth in new features without upsetting much of the application.

It's good to see you're giving this some thought. Validation is a tricky beast and I don't pretend to have all the answers. You want rich user interfaces that can perform validation (to a certain level) to give users immediate feed-back as to how valid their input is. Then you want fuller validation (checking of constraints and complex business rules, concurrency etc) on the server.

I am certainly pro "interface"-based programming and factories (especially configuration-driven ones), however factories are a "creation" pattern. They're typically responsible for constructing and returning types of things. I don't see any creation-al stuff happening in the example you gave beyond just regular creation and object use. You could modify things a little to be more factory-like.

Relating to your comments on web services - I'm not sure that making your GUI implement a particular interface and then passing it to a service back-end is a good idea. The whole GUI type would need to be serialized and passed. Typically a data transfer object of some kind is used for this. Some types don't serialize well, and properties/fields defined as interfaces definitely don't xml serialize.

Also another small point - the I prefix is usually reserved for interfaces, but you've shown classes. I'm not sure if you intend them to be interfaces or not.

As I said - interesting to see your line of thinking. Keep up the experimentation.

How about a download of all this in a VS.NET solution? Thanks. :)

I've recently read a very interesting article on Chris McKenzie's blog about a 7-layer system in which the UI uses nothing but Interfaces to interact with. I would think that this design is optimal for mock objects. I also would think that this design len

<a href="http://weblogs.asp.net/taganov">Chris Mackenzie</a>'s take on "<a href="http://weblogs.asp.net/taganov/archive/2005/04/05/397300.aspx">Implementing an Interface in the UI, or the 7-layer system</a>" is based on having an interface for each of our entities in the system. His example focuses on a Person entity, thus having an IPerson interface. Now, the issue of having UI elements implement these interfaces is interesting, but secondary. First, we have to take a look back at what separating an interface from an implementation entails.

A "Person" is more than just their data - our IPerson interface should also contain methods for manipulating Person objects. I would even go so far as to say that we should avoid using the "set" part of properties - all manipulation should be entirely method based. I know that this is OO zealotry, but I've found that, more often than not, large blocks of code are written behind "set" properties. This can be easily taken too far.

So, what I propose is to refactor our IPerson interface into 2: an IPersonInfo interface which contains the data-only aspect of a Person as property "get"s only, and an IPerson interface which inherits IPersonInfo and contains the behavioral aspects of a Person - the methods.

What is the good for?

Well, for those cases where we will want UI controls to implement our IPerson interface, it would seem odd to have such a control need to implement a "GiveTwoWeeksNotice" method.

Also, since the IPersonInfo is, in essence, read-only data, we can safely pass it anywhere without worrying that the data in our object will be corrupted somehow.

There is one thing to watch out for, though. The IPersonInfo is really a data transfer object, something of an anti-pattern within a given application boundary. We need to make sure our application doesn't regress into procedural manipulation of the data. I don't think there will be too much danger of that for developers used to separating interface from implementation.

So, to end on a positive note, the IPersonInfo can also be effectively used at application boundaries - between client and server for instance. As well, when it comes to persistence, all we're really interested in is the data - no need to use an IPerson when an IPersonInfo will suffice; but one can consider persistence to databases (and the like) as a kind of application boundary too.

I wonder if there are any practices for testing such design patterns? patterns are nice but the usual give and take that you get for using them is that you add complexity to your project. With added complexity comes higher risk for bugs.

Maybe I can find some info on how to test and how these patterns improve or make testability harder.

good stuff :)

^_^,Pretty Good!

^_^,Pretty Good!

^_^,Pretty Good!

^_^,Pretty Good!

^_^,Pretty Good!

Okay but wasn't Ralph always a little crazy? Take this quote for an example. What did he mean? If you put the word "well" in italics to add some emphasis, then this statement doesn't make much sense. What's the point of doing something WELL if its only reward is to get it done? Why not do it in a hurry then, and style-points be damned.

A bit wonky, but hey look at the kind of world we have.

Do you get a lot of personal satisfaction from doing a bad job even if the pay is good?

I think the reward of doing something well is the knowledge of your own competenancy. It feeds your ego, and you feel more secure in your ability to handle challenges.

Do any other programmer's have this problem? My current job isn't especially challenging, and I know several times I've caught myself making some meninal task harder on purpose, just for a little excitement. Of course, this is not a good habit for enterprise apps with large teams as it breaks the KISS rule (i.e. keep it simple stupid). The next person who follows you and looks at your code will be really annoyed that you obfuscated such a simple task.

I doubt you can find a tool that would do some kind of conversion (at least from Fortran to VB.NET). However, if it has been initially written in Fortran, it's probably because it heavily relies on math libraries. There is a math and engineering library for .NET which probably covers what your friend needs:
http://www.xhovemont.be/archive/2005/03/09/550.aspx

What locale is the code running in? From the .NET Framework Developer's Guide: "By default, the String.Compare method performs culture-sensitive and case-sensitive comparisons." The 4 argument Compare overload allows the culture to be specified (maybe use CultureInfo.InvariantCulture).

It looks to me that, what this guy is testing is to check if both sets ( ' and , ) and ( '* and ,* ) comparision's result is the same because they start exactly the same. No matter the culture and anything else these symbols should compare equally I think.

it's like trying to sort

(a , b)
and
(ac, bc)

for both sets String.Compare should return the same result.

That's right--it shouldn't matter what the cultureInfo is--either "'" < "*" or "'" > "*". The rest doesn't matter.

I ran this same test in C last night. The strcmp() function in C works as I expected it to.

String.Compare uses word sort rules, not string sort rules. This give different weights to characters so that things like I'll is close to Ill, even though by string sort rules theres a big difference in the 2nd character.

So it's assigning a different weight to the ' character based on wether or not it's part of a "word".


If you don't want it to act this way (and want to do a string compare instead of a word compare), you need to get the CompareInfo object from the current culture, and pass in StringCompare as the CompareOptions param:

Result1 = CultureInfo.CurrentCulture.CompareInfo.Compare(test1, test2, CompareOptions.StringSort);

Result2 = CultureInfo.CurrentCulture.CompareInfo.Compare(test3, test4, CompareOptions.StringSort);

I don't like this behavior too much either. And I don't like that String.Compare has no overload with a CompareOptions param.

Sounds like you should try a callback. It's available in ASP.NET 2.0 but you can make it work in 1.1 also.

Checkout info here: http://www.koinos.com/PermaLink.aspx?guid=76cf4bc7-d64a-4110-9af4-81d8bc65210f

You'll basically have to get a string back and then parse it and stuff it into the drop down list but it will work.

What about using Javascript to replace whatever the postback is doing?

Sounds like a good idea. How would you suggest doing this in the DataView.Sort method?

No, they don't teach common sense in college courses because it is common sense.

"It's hard being a self-taught programmer sometimes. Will they cover this issue when I get to my relational database courses in college?"
No way! :)

I agree it's common sense to leave them out of the view. Once you understand how a view is used in a query, you'll understand putting them in the view is weird: select * from myview, where myview is select * from foo, does:
select * from (select * from foo) as Myview

so adding the order by in a view is not logical, normally you wouldn't put it there also if you would use a normal query.

It must not be as common-sense as you think because I've seen it just about everywhere I ever worked. And most people I've worked with have experience and degrees.

The mentality that I had (and other programmers I've worked with have had) is that Sql Server does stuff behind the scenes to optimize the query. What Sql Server does has always been something of a mystery, but I'm starting to see the underlying work now. The execution plan is starting to make sense.

Additionally, none of the books or Sql 2k Documentation covers the issue at all except to say that it's not possible to use ORDER BY in a view except with TOP is also specified.

Further, there are articles that specifically recommend that you do it: http://www.microsoft.com/sql/techinfo/tips/development/ORDERBY.asp

Follow up:
What you've said makes sense AFTER the fact, but hindsight is 20/20.

There are actually ways to make it work, FWIW -- it is one of the major topics I will be dealing with at my TechEd talks in Orlando and Amsterdam (DAT290 and DBA319), for both Shiloh (SQL Server 2000) and Yukon (SQL Server 2005).

Care to offer any spoilers?

Heh heh heh -- after my blog is back up maybe I'll post some stuff on this issue -- it is an interesting one.

Right now the whole MSDN blog site seems to be down though. Hopefully they will fix that soon!

Scratch the maybe -- I will post something this afternoon, after they get it back up. :-)

We have very strong migrations technology (www.artinsoft.com) but do not have a Fortran tool, but tons of previous experience. Coould you put me in contact with your friend? Thanks

Yeah, I've always felt that ORDER BY is bad anyway. The problem I've got is that the current project I am on won't let me do a sort any other way.

Wally

Excellent! Thanks.

In my project, I use the ORDER BY when returning the values from the procedure--I'm just taking care not to use ORDER BY before that point, i.e., in the views.

Chris McKenzie blogged about a situation that I will be talking about in my upcoming TechEd presentations...

There you go, Chris. Enjoy. :-)

Any time -- my favorite part is how in SQLS 2000 it was a hack, but in SQLS 2005 they did the work in the engine to make it a genuine feature!

No need to shout though. I can hear even the whispers if they link to me.... :-)

Okay, I tried Phillip's suggestion and it doesn't work. Any other ideas?

Chris:
Just a personal recommendation..consider rolling a 2nd character and keeping it quasi up to date...you might find the paladin class bland to play after a while...

great game though :) gl (different server)

Blogging and playing WoW... nice!

Also, while re-rolling, one would hope that you might come up with a more creative and personal-to-you-name than Kahlan. Definitely NOT some form of Richard, lol!

<People tend to be more interactive with those who created a char name, rather than someone who "borrowed" it from a book... At least, I am that way with folks playing in AC2 >

RePost:
http://www.yeyan.cn/Database/ORDERBYViews.aspx

hello sir,
i was strucked at form authentication in reproting services so pls help me
and my problem was when i am configuring the files, reportmanger in the browser is saying as error could not found so pls help and suggest me

I use OnItemDataBound when I have to and not when I don't. I certainly run into both cases frequently. If, in the future, new needs require more advanced formatting/processing, it's typically trivial to move all/parts to the OnItemDataBound event.

"Always implement things when you actually need them, never when you just foresee that you need them" sums up my view of this one...

I'm afraid I'm with your co-worker.

I generally use server tags in the HTML, particularly if I've got some weird and wonderful formatting going on in my table. I find it easier to picture what's going on with all the layout and content bunched together.

Although I also use <%# GetMyWeirdlyFormattedString(Container.DataItem("Name")) %>

if it's very weird.

Oh well. Guess we're all different

We build DataGrid columns in code-behind.
1)Declaration of DataGridColumn on page level makes easy to reference it on every DataGrid event(by Column index)
2)We can change the way Grid looks and behaves by changing code in one place(Lets say we have corporative Date format and you want to change it)
3)In future we will be able to hold Grid columns information in configuration file/database

I too am with your co-worker. Doing it The Declarative Way makes it, IMO, easier to maintain (a designer can add/remove things if he/she like without having to worry about breaking dependent code). Doing everything on ItemDataBound also means that you somehow have to find the right controls (assuming you don't build the whole control hierarchy for each item there). This _may_ be problematic in certain situations when dealing with container controls (read: controls implementing INamingContainer).

Sometimes you have to do more than simply output data in the data object. In that case I would add helper methods in the code behind and call that, like Benjimawoo suggested. That way I think you generally have the best of both worlds.

Or you could stay away from the DataGrid altogether. We have used repeaters extensively across our applications. We wrote a custom paging control as well as built in sorting. The render time on a repeater is much shorter than a datagrid and you can control the html without having to override the lifecycle methods of the control.

I figure someone will say something about tediousness of writing html with the repeater, but we code generate most everything for list pages, and even if we have to customize something at least 60% or more of the work has already been done.

I believe that any DataLayer must be a simple code block, that they allow operations against DB.

That code block would not have to know on the Business Entities. Single to specialize it is to execute the operations (Store Procedures and SQL Sentences) against the engine DB (SQL, Oracle, DB2, etc.), with which this setting.

Finally, I invite to you to download the DataLayer.Primitives Public Version.

This is very cool Data Layer :)

DataLayer.Primitives - Readme!
http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=1389

Cheers,

Javier Luna
http://guydotnetxmlwebservices.blogspot.com/

1) I didn't think anybody used GridLayout

2) What's wrong with Trace.axd?

1) lots of people use GridLayout: some of us got religion on FlowLayout late in the game, and others of us inherited projects that used GridLayout and can't change it right now.

2) I didn't know about Trace.axd until you mentioned it, but it appears to only log errors. I'm interested in Trace for reasons other than errors.

I stand corrected: Trace.axd is good, but you still have to turn tracing on on the page for it to show up in Trace.axd. And if it's going to show up on the page, I'd like it to be put someplace useful. :-)

Check out my ASP.NET Development Helper tool. It lets you hide trace and view it in a separate window as well, without having to add script to your page.

http://www.nikhilk.net/ASPNETDevHelperTool.aspx

I rarely use DataGrids - I just find that they're too restrictive and I have too much overhead. I'm a big fan of simply using repeaters to code up lists that look/feel exactly the way I want. Everytime I start with a DataGrid I end up replacing it as the functionality of the list grows. That being said, I prefer the declarative method. When I'm already using an <asp:... > control I try to keep as much of the presentation with the control rather than pushing it into the code behind. It usually ends up cleaner and easier to read.

I believe that any DataLayer must be a simple code block, that they allow operations against DB.

That code block would not have to know on the Business Entities. Single to specialize it is to execute the operations (Store Procedures and SQL Sentences) against the engine DB (SQL, Oracle, DB2, etc.), with which this setting.

Finally, I invite to you to download the DataLayer.Primitives Public Version.

This is very cool Data Layer :)

DataLayer.Primitives - Readme!
http://forums.microsoft.com/msdn/ShowPost.aspx?PostID=1389

Cheers,

Javier Luna
http://guydotnetxmlwebservices.blogspot.com/

My 2 cents:

I go with the repeater/code behind approach for the simple reason that a code change will break at compile time.

This:
<%# Container.DataItem("AttorneyName")%>
will not break until you visit the page if you've changed the object that is populating the control.

This:
private void repeater_ItemDataBound(object sender, RepeaterItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.AlternatingItem || e.Item.ItemType == ListItemType.Item)
{
// Get the object for this row.
AnObject o = e.Item.DataItem as AnObject;
if (o!= null)
{
// Set the fields.
Label name = e.Item.FindControl("labelName") as Label;
if (name != null)
{
name.Text = o.Name;
}
}
}

Will break at compile time if AnObject has changed.
Of course, this means you have strongly typed objects instead of SQL queries but the only place a SQL query should exist is in the DAL.

I know VB is getting (back) the differing scopes of properties.

The secret thing would be pretty nice. It would clean up the code since the variable declartion would be in the property.

I think you'll find whidbey already does your first wish (differently scoped getter/setters for properties)

public int Testint
{
get
{
return 1;
}
protected set
{
//set stuff
}
}

or in VB:
Public Property TestInt() As Integer
Get
Return 1
End Get
Protected Set(ByVal value As Integer)
'Set Stuff
End Set
End Property

Very handy feature for the exact reason you've already covered - being able to add an 'internal' modifier to a set is also useful

Good news for some .NET developers

Good news for some .NET developers

Glad to see we get half of this. Shame about the other half though. I like Wedgebert's idea of putting the 'secret' member in the property:

<pre>
public int Property1
{
int m_iProperty1;
get
{
return m_iProperty1;
}
set
(
m_iProperty1 = value;
)
)
</pre>

Very concise syntax. Keeps the member hidden even from the rest of the class so you have to use the property to access it.

I realize, of course, that both of these features could be accomplished through subclassing but I thought this would be more elegant.

Oh, I see it was Chris who came up with the idea in his VB example. This VB stuff's all greek to me...

Congrats on the house - hope it's everything you want it to be.

My theory is this: Whenever a normal person plays with a handicapped one, for example in a video game or baseball or any competitive activity, normal people would have the subconscious tendency to perform below their usual. I have no basis for this, it's just one of my wild theories.

luke use the force... Anyways it does say how he does it.. he uses audio for it. I am sure since he doesn't have eyes he has a much better sence of hearing.

You can define an interface that just have the accessors and use something like this to use it:
http://www.ayende.com/Blog/DynamicCasterIsDone.aspx

object[] values = new object[datareader.FieldCount];
datareader.GetValues(values);

then in your bo, pass in the values array, and use datarow.ItemArray = values;
to set the values all at once.

it can't get any faster than that. Positive side effect: you don't pass around the datareader reference.

Why would you ever want to pass an ADO object to a constructor? I know you are not talking about a domain object, but even your factory or builder objects. Passing a DataReader can be very bad since it is created somewhere and then passed off. The connection to your datastore is open the whole time. A better approach would be for your repository object to have a builder method that gets the ADO object, extracts the info and builds (constructs) your object. Then the complete instance can be returned.

Good point--but that's sort of what I'm doing. My FACTORY objects simply return Interfaces. The implementation objects are declared as Friend so they cannot be accessed directly by external callers.

The code looks something like:

Public function GetMyObject() as IMyObject
' Code to build an IDataRecord Object.

dim myObj as IMyObject = New MyObject(MyIDataRecord)
Return myObj

End Function

Funny, we just ran into the exact same issue here with the same solution.

Thank you Google!

Aaron

123.- is valid because some number formats place the sign after the number.

Same goes for +, they are both valid because they are signs.

/ and * are false because they are only mathematical operators.

[)amien

i love u

I can understand that--but if the number format is valid then shouldn't double.parse() parse it correctly? Or if it's a matter of having to supply the number format, shouldn't the default format used by IsNumeric() correspond to the default format used by double.parse()?

I rather use RegEx for validation.

"but if the number format is valid then shouldn't double.parse() parse it correctly?"

I would guess that Isnumeric and Double.Parse both use the default format if one is not specified, and that this format isn't correct for the default culture/format of the app.

Double.TryParse should be really be used.

They should, but per the above example, they apparently do not.

Isn't IsNumeric a VB.Net function in the Microsoft.VisualBasic namespace. I'm guessing the the way IsNumeric checks for validity is different from Double.Parse. Maybe, the people who wrote VB.net at MS decided they would have IsNumeric work the same way as in previous version of VB and not have it work the same way as Double.Parse.

It is a legacy function from VBx, yes. I'm guessing that the issue probably never came up at MS. The casting functions (CDbl(), CInt(), CBool()) also existed in VBx. A quick check reveals that CDbl("123.-") yields -123.0. So what have we learned? That CDbl() is not a wrapped call to Double.Parse(). Intersting.

Microsoft.VisualBasic != mscorlib

The legacy VB functions are not just wrappers around the .NET framework, since they retain the legacy behavior.

Lesson learned: Avoid Microsoft.VisualBasic namespace if you want predictable and consistant behaviour as other .net languages.

Check this out with Reflector:
Microsoft.VisualBasic.Conversion.Val(String) : Double

hey check the microsoft kb or google , something like this was reported.just do some searching

I did. I didn't find anything in the knowledge base. Google gave me a whopping two pages of search results, all of which were other programmers complaining about the same problem--but no one having a solution, apparently. Further, I posted to two microsoft newsgroups about it.

I did file an official but report with Microsoft about the problem though.

How are you going to verify the printed output?
I'm pretty sure that it is possible to programatically set the file output. At worst,you're looking at doing it via mocking the UI for the system itself.

I would suggest you would ask in the TDD mailing list here:
http://groups.yahoo.com/group/testdrivendevelopment/

What I do is print to pdf. You can download pdfcreator for free and set it to print to a pdf in a directory without asking for the filename.

http://sourceforge.net/projects/pdfcreator/

If you have any questions send me an email to cdonges at google's web email service.

Thanks, I'll look into making that same class.

And I agree. I'm not a DBA and yet I find the number of questions during a developer interview are database questions, some involving DTS packages, replication, backup jobs, etc. I mean I know how to do those things, but not off the top of my head....

I am not a DBA either but if you need to update the statistics by executing sp_updateStats there might be something wrong with the properties of the indexes as updating the stats should be the responsability of the SQL Server there might be however some rare occassions where you want to be in control of the update of the stats but not for regular use. Ask your DBA or if you have access check the indexes of the tables for the options automatically update statistics.

That's the whole problem. We don't have a DBA. I guess we do if you count me, since I'm the person responsible for developing and maintaining the database schema; but we don't have a person who's career focus is on databases, and knows how to fine tune them to get the best performance out of them.

I'm learning an enormous amount about SQL Server. But I still think if I had my way, I'd spend my time on the coding side of things.

As a side note: I've never actually worked at a place where they have separate DBA's and developers. <tongue in cheek>Do they actually exist? </tongue in cheek>

If the problem was due to out of date index statistics why would there be any differences when executing the query in query analyzer or a client application? Sounds a little bit odd but then I am not a DBA either.

Aye, that struck me as weird too. But I verified it 6 ways to Sunday. I even ran both queries through the Sql Profiler. The query in Query Analyzer had about 8000 reads, but the one running in the app had about 130,000 reads. The query text was identical though. I'd be interested in learning how that happened if anyone knows.

"I've never actually worked at a place where they have separate DBA's and developers."

I'd hate to work at those places then ;-). Most of the gigs I've worked have had a very clear distinction between DBA's and Devs...quite simply put I wouldn't want devs (with our wreckless nature) in charge of production DB's.

They way I see it is this: Devs are in charge of A) coming up with the schema B) writing sprocs/functions/etc C) writing tests against the db whereas DBA's are in charge of A) administrative tasks like scheduling backups/defining security/etc B) monitoring the db for performance issues C) cleaning up whatever messes users/devs make on the db D) pretty much any issues w/ *production* databases. The roles are very much seperate in most IT departments. As they should be.

> I also added a DBMaintenance object to my application class so that I can update statistics whenever the need arises.

Do you think it is a good idea to allow your client code execute such low-level db stuff?

Yes I do because this app/db is something that we deploy as an intranet solution to our customers. Our customers by and large do not have an IT staff, and will need to be able to manage their data without hiring expensive technical people. We provide a means to do backups other periodic data maintenance already. We do all of this through our app.

To put the point another way: if the customer runs into the problem that I did, they would call customer service. Customer service would be unable to resolve the issue, and they would call... ME. So, if I put a troubleshooting screen in the app they can try all the standard things I would try without having to call us.

Comments, criticisms?

PingBack from http://geeknotes.wordpress.com/2007/03/21/datarow-adaptation-to-idatarecord/

Building pda with hard drive is a challenge and balance between battery and the circuitry in embedding more chips. Juice consuming parts in pda are mainboard with processor with less instruction set compared to desktop line processors, they can provide enough battery to use pda for couple of hours or half a day or so. if they put hard disk into pda they have to provide battery power to hard disk for it to seek data and write data , solid state memory cards consume less memory compared to hard disk. The conclusion of the story is PDA's are going to become bulky, because they have put bigger size batteries to supply enough power to all parts of pda

Hi, can you elaborate a bit more on the approach you came up with. Are you also working with vouchers_

Hi Chris,

I encounter the same problem with VS.NET 2005 sp1. Have you found a solution to this problem?

If so, please help !

( cmanoliu @ bouyguestelecom . fr )

Regards,

Catalin

Fin all you need to know here :

s1.bitefight.se/c.php

Hey C# guys i wanted to tell you that the vb.net and c#.net are not comparable.

The reason is that c# is only static language.

This means that you must declare all of your types at design time. You can not get on the other side of the compiler. This is called Early Binding. But visual basic.net supports both Early and Late binding. For the end user - the customer this means that vb.net applications are more flexibile, more professional and more fast then a c# app's.

For the vb.net programmers this means less code and more but also more knoledge to do it.

In vb.net you can do both things. So to say that you are a professional vb.net programmer you must be able to make your application work in both sides of the compiler.

In vb.net you can play with your application at runtime in the same way you do it at design time. So to say that you are a vb.net pro you must have perfect skills to work with the code and also with the vb compiler at the same time.

This is one big reason why peoples choose c# becose it's easier then vb but c# and c++ and j# are static languages.

VB is static and dynamic at the same time. You can make vb only static by setting Option Strict off butt you probably wont do that becose you dont want to lose the power that gives you vb.net as the only dynamic languge.

I just wanted to notice to you that vb.net is better but requires more knoledge and skills in order to deal with the runtime as you do it only in design time with the other languages.

You can read some articles on the web about this.

Sincerely

~Frenkie~ MCTS Win Dev (Visual Basic 2005)

Last few days are very frusting days for me because of sql server2005 report server configurtion. I have a web application which is using report sever situated on different machin and report server database is present on the third machin.

I want to access my web application from fourth client machine. So i want infoarmation regarding what type of security model(different account settings ) I should use to access reports from my application.

I am confuse about following account settings

IIS virtual directory:

1>which account should i use for report server application pool (network service or domain account).

2>Should i enable the anonymous access if yes then which account should i use for it so that not every client need to add on report server

3>Should i check the integrated authentication on for reports server virtual directory

Report server

1>if I would using anonymous access then should I need to add anonymous account user on report server and also will this account need permission on report server folder

2>Will this work for both type of authentication for datasource

Yes, Vb.net apps are "more fast".

Enough said about the quality of VB.Net developers lol

From the blog: "OOP: C, C++, C#, VB .NET"

BTW, C is not an OOP langauge

-------------------------------------------------

In reply to Jeffrey Palermo:

"What if you programmed in COBOL.Net and could write any OO app better than any c# programmer."

This would be a very impresive feat since Cobol is not an OO language!

-------------------------------------------------

In reply to Pedro Silva:

"But, there are definitely teams at Microsoft that use VB for development."

If you can point me to one single Microsoft product that is written in VB I will be astounded.

-------------------------------------------------

In reply to Frenkie .Net 2.0 MCTS Windows Developer(vb.net 2005):

"vb.net applications are more flexibile, more professional and more fast then a c# app's."

Actually dynamically bound code is slower than statically bound code.

"this means less code and more"

Did you read this after typing it?

"This is one big reason why peoples choose c# becose it's easier then vb but c# and c++ and j# are static languages."

Do you not realise that Visual Basic is a form of BASIC or Beginners All-purpose Symbolic Instruction Code? Its a language designed for people who have little programming experieance to learn programming techniques.

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Ok... so BASIC was made for beginners...  Do you understand that VB.Net is a huge expansion from the original BASIC written by Bill Gates?  C++, and C# are all huge expansions that started there as well.  I'm guessing that you honestly almost never use VB, and most likely don't understand how close they actually are... Not statistically speaking, but just progmatically.  VB is now extremly close to the way programming is done in the more prestegious languages such as C#, and C++.  They can all get the same projects done, but in different ways.  There are differences, such as pointers, and Header Files, but if you like one better than another, thats up to you.  There are still languages avaliable that do what BASIC did, and they are the languages for beinners.  At the same time, I will admit that in this world, VB is less respected than C, and C++... but that is because it used to have a lot less functionality. The new 2005 versions are incredible, and are all almost even in my eyes.  I use VB for most of my projects, but I've used C++ too, and its not that much more complicated at all, but I can tell you that it's tedious.  Why would someone choose a slow tedious language to develop on, over a fast one only at the cost of a very trivial amount of performance that basically all machines today would have no trouble dealing with.  One reason I can see for it, is for extreme gaming, or some other type of full CPU performance program.  Another may be to gain acknolegment with people who find C, and C++ better. But thats about it... So, I believe that you will find that they are very simmilar, but with small differences.  But... SCG... please dont think that the Visual Basic today is within the same skill level of the original... It can be, but it can also expand to do what top level languages do.

Hey, I also wanted to say that it still is a good idea to switch to C++, or C#... mainly because they are simply more respected languages.  I don't fully understand why, but they are.  If you don't like them, then swith back... I don't want to fully switch either, but I know that thats what I should do, so I'll pray, and hope for the best!  I on't see how i could hurt... at most I'll just become a better programmer! (O... and in my last post I wasnt really talking to you Chris, I was talking to SCG... sry, jus didnt want u to think i was yelling at you)

“Do you understand that VB.Net is a huge expansion from the original BASIC written by Bill Gates?”

BASIC was not originally written by Bill Gates. According to wikipedia: Basic was “designed in 1963, by John George Kemeny and Thomas Eugene Kurtz at Dartmouth College.

“I'm guessing that you honestly almost never use VB, and most likely don't understand how close they actually are...”

I have a good amount of experience in VB2005 and I despise it. I cannot see how any reasonable programmer can be more productive in VB than in more or less any other language. Its got a good IDE but the language will always matter more than the IDE.

Here are a few of the things I hate about VB:

1.

   Sub Main()

       Console.WriteLine(DoSomething(Nothing))

   End Sub

   Function DoSomething(ByRef x As Integer) As Integer

       Return x

   End Function

Can you guess what this writes to the console? Unbelievably it is 0! This should throw an exception! Actually it probably should not even compile!

2.

   Sub Main()

       Console.WriteLine(DoSomething("This compiles!!!"))

   End Sub

   Function DoSomething(ByVal x As Integer) As Integer

       Return x

   End Function

The above code actually compiles!

3. Dumbed down syntax: Me.X instead of this.X. Could the “me” keyword possibly be anymore condescending to the people who have to use it? Also “Friend” instead of “internal” and unbelievably; “MyBase” instead of “base” or “super.” Other nasties include “MustInherit” and “MustOverride.”

Also not using standard terminology such as “Shared” instead of “static” and

4. The ridiculously verbose syntax:

Public Class Test

   Inherits TestBase

   Public Overloads Overrides Function ToString() As String

       Return ""

   End Function

   Public Overloads Overrides Function ToString(ByVal arg As String) As String

' Yes this actually compiles without an error! It does give a warning though

   End Function

End Class

Public MustInherit Class TestBase

   Public MustOverride Overloads Function ToString() As String

   Public MustOverride Overloads Function ToString(ByVal arg As String) As String

End Class

5. Allowing functions without a declared return type

“Hey, I also wanted to say that it still is a good idea to switch to C++, or C#... mainly because they are simply more respected languages.  I don't fully understand why, but they are.”

Many of the above complaints are about features that are supposed to make VB easier to use to novice programmers. This is why VB will never be taken seriously by expert coders.

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Is there any documented way to return a string value from a vba function when calling it from c# using the vsto / office interop? i tried using the invoke "run" but it runs against voids only and i tried passing an object to a vatient in vba but it did not return the data although the object was sent byref.

This is not a solution!!!!!!! This how to prevent to having this problem.

For now, I do have this problem and the question remains: How do I solve it? I can't go back to the privious account because some stupid ass did setup a new domain.

the report server cannot decrypt

Go to command prompt.

rskeymgmt -d on server.

In browser  http:\localhost\reports

Resetup  Windows Service Identity

This will work. I also faced same problem.

Follow below steps:

go to the directory:

C:\Program Files\Microsoft SQL Server\MSSQL\Reporting

Services\ReportServer\

or the equivalent program path on your computer and type

rsactivate -r -c RSReportServer.config

if rsactivate is not in your path (which it should be after an install) you will find it in

C:\Program Files\Microsoft SQL Server\80\Tools\Binn

or whatever path is the equivalent on your machine

There is a ViewState symptom to consider in the realm of programmatic versus declarative server control initiation debate; at least within the 2.0 framework.  

If you rely on a server control’s view state to retain its data across postbacks, so that you’re not required to continuously re-load the control every time the page refreshes, asp will store your entire data set for that control in view state (that’s about 136 lines x 1024 characters worth of view state for a single DropDownList control populated with approximately 5000 records).  All changes made to server controls via the code-behind file are lumped in with asp’s interpreted "user-initiated control changes" and so are preserved within view state rather than stored server-side.

Alternatively, declaratively binding a server control to a DataSource object, such as a SQLDataSource or an ObjectDataSource, will store the control’s associated dataset server-side eliminating the size-able view state that will travel to/from server and users' browsers for each page request.            

Similarly, any property setting changes made to controls in a programmatic manner, such as the control's styles, maxLength, databindings, etc will ALSO be recorded and maintained within the page's view state.

Is this really an issue when you're talking about rich server controls such as the GridView which already occupy more than a substantial amount of ViewState?  That all depends on your unique situation, but it's food for thought.    

This is from a long time ago, but nobody ever really addressed the big problem here, that many of us use SQL Server roles for application level security (we can debate the merits of that elsewhere). If you are giving a demo and need to give a user db_owner privileges to ensure they have access to all the tables and can reset anything they need to, suddenly the rest of your security goes haywire. Obviously you would want to carefully set the permissions to the different tables in a production environment, but a routine like below can tell you if a person is part of a role even if they are db_owner.

declare @username sysname

declare @role sysname

declare @return bit

set @role='dude'

set @username='ajc'

if exists( select 1 from sysusers where name=@role and issqlrole=1 )

BEGIN

if exists(

select

1

from( select uid from sysusers where name=@role and issqlrole=1 )role

inner join sysmembers on groupuid=role.uid

inner join ( select uid from sysusers where name=@username and issqluser=1 and hasdbaccess=1 )users on sysmembers.memberuid=users.uid

)

set @return=1

else

set @return=0

END

select @return result

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I designed reports using windows authentication in sql server 2005 express edition. when i am trying to deploy it is prompting for username and password.

i uploaded reports manually by using http://localhost/reportserver

i got view of report, but when i use report name in reportviewer in webform page not found error coming.

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Go to the Reporting Service Configuration Tool

Click Encryption Keys

Click the Delete Button

Awesome, deleting the key worked perfectly!  It's not like I have any sensitive info on my report server anyway.

Hi

I' have SQL RS previously configured using NT Authority\network service account. This works fine on LAN, I want to publish this site using SSL, is this possible. At present the RS configuration is on 2 servers, one db server and the RS server with no SSL configured. any help would be great. When Certs are setup in IIS, I get a page not found error. when SSL taken off the users can view the reports again. many thanks

Jenni

     Good idea!

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I just love VB for it's IDE, plain understandable syntax,

I don't know why C# should be case sensitive?

also, the VS2005 IDE for C# sucks, code completion of C# is very bad.

 have you ever was changing some code in C# then got lost by the lots of braces, and kept moving between the braces to find the missing one? This is a wast of time.

in VB.NET any one can understand a peice of code does, it's in plain english :)

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Thank God, I was going crazy trying to fix this. Deleting the key works perfectly (had to recreate my Data Sources, but man, that is an infitely simple solution)

Thanks!

Hi,I am facing the same problem,Did any one found a solution for this

Thank you for this (deleting the key), without that advice I would have been in big trouble.

when two user hits same information for viewing using sql 2005 report server it works only for one user.the other user cannot view the content and he can able to view only after refreshing..can anyone provide me solution for this problem plz..?

Usually, I don't leave comments...but dude to post such a simple solution deserves applause!

Thanks a lot! Einstein

I don't know the cause, but it seems that the page forgot the entire ViewState after the postback, and you can't see anything because of this.

In my case I cannot aply this fix, but it works if you call the Page_load code after every postback. Try it

Thnx... saved my day too...

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"Sub Main()

      Console.WriteLine(DoSomething("This compiles!!!"))

  End Sub

  Function DoSomething(ByVal x As Integer) As Integer

      Return x

  End Function

The above code actually compiles!"

To SCG: So what if it does compile? Only a MORON like yourself would try to use impicit conversion in such a string. The problem is actually in your BRAIN.

It is like you are demonstrating how a dog will bite your hand if you throw your own hand in its mouth!!!

You seem to lonely and psycopathic.

LET'S SEE WHAT YOU'RE SYING:

******************

1.

  Sub Main()

      Console.WriteLine(DoSomething(Nothing))

  End Sub

  Function DoSomething(ByRef x As Integer) As Integer

      Return x

  End Function

Can you guess what this writes to the console? Unbelievably it is 0! This should throw an exception! Actually it probably should not even compile!

****************************

IN FACT YOU HAVE NO REMOTE IDEA WHAT YOU'RE TALKING ABOUT. YOU WRITE CODE LIKE A TODDLER. SIMPLY BECAUSE YOUR SKILLS WERE DEPRECIATED BY NOT USING VB.

LET'S SEE WHAT THAT KID WRITES AGAIN:

******************************

3. Dumbed down syntax: Me.X instead of this.X. Could the “me” keyword possibly be anymore condescending to the people who have to use it? Also “Friend” instead of “internal” and unbelievably; “MyBase” instead of “base” or “super.” Other nasties include “MustInherit” and “MustOverride.”

Also not using standard terminology such as “Shared” instead of “static” and

***********************************

GUYS, I GOT IT! THAT LAD WAS BORN JUST YESTERDAY... HE HAS NO IDEA OF THE WORLD EXISTING BEFORE .NET... SO THAT'S WHY HE DOESN'T UNDERSTAND ANYTHING...

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Oh, thanks. We have been troubleshooting this issue for a couple of hours, and this post helped us figure out the reason of the problem. At the very least, Microsoft should've included a remark about this behavior in the documentation of IS_MEMBER.

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Hi,

does any one know, how to configure anonymous access on Reporting services 2008.

Thanks.

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Very easy!  All I had to do in Reporting Services Configuration manager was first to back up the key, then delete it.  Shazam!  The browser could connect to the report.

Thanks

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You don't have to answer.

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Thanks so much.. deleting the keys worked just fine..

does any one know, how to configure anonymous access on Reporting services 2008.

Thanks.

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