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Daily tech links for .net and related technologies - Feb 10-12, 2010

SanjeevAgarwal — Wed, 10 Feb 2010 06:58:00 GMT

Daily tech links for .net and related technologies - Feb 10-12, 2010 Web Development 'Unobtrusive' asynchronous Form in ASP.NET MVC - Tomasz Peczek ASP.NET MVC security checklist Multi-tenancy in ASP.NET MVC - Views - Rob Ashton Default Values in ASP.NET MVC Action Parameters - David Hayden Quick Tips About ASP.NET MVC – UI Helpers and Templates - Nuno Silva Quick Tips About ASP.NET MVC – Editor Templates - Nuno Silva ASP.NET MVC Quick Tips – Pass data to your master page -Nuno Silva ASP.NET MVC...(read more)

Architect 3 : Building Data Access Layer Using Microsoft Enterprise Library 4.1

StanleyGu — Wed, 10 Feb 2010 01:52:00 GMT

You have a Customer table with three fields: ID, LastName and FirstName. You are building a data access layer to retrieve all the records from the Customer table and return the result as a collection of Customer objects. You want implement it using Microsoft Enterprise Library.

1. In your Data Access Layer project, add references to the following Microsoft Enterprise Library DLLs:

Microsoft.Practices.EnterpriseLibrary.Data.dll

Microsoft.Practices.EnterpriseLibrary.Common.dll

Microsoft.Practices.ObjectBuilder2.dll

2. At App.config or Web.config, add the following dataConfiguration section:

3. At App.config or Web.config, add the following connectionString:

4. At the Data Entity Layer, create a entity class Customer:

5. At the Data Access Layer, create a class CustomerDAL and make sure put the following using statements:

6. Create a method GetCustomers in the CustomerDAL class with the following implementation:

Visual Studio 2010 RC Feedback Channel for Web Tools

Latest Microsoft Blogs — Tue, 09 Feb 2010 20:19:08 GMT

As you probably heard the Visual Studio 2010 RC is currently available for MSDN subscribers! You can download it from here http://msdn.microsoft.com/en-us/vstudio/dd582936.aspx . General public release is slated for Wed. The Web Development Tools Team Read More......(read more)

Most interesting from SharePoint 2010 Virtual Ignite Training: 2nd Day

Jevgeni Borozna — Tue, 09 Feb 2010 15:53:05 GMT

9 feb 2010: Virtual SharePoint 2010 Ignite Training for Developer

Notes:

Intellisense when editing Wiki-pages and other type of pages and inserting some page property. (When writing “[["…)
4 default Master Pages:

v4.master (default for SP 2010)
minimal.master
simple.master (For error pages or login pages. Not customizable, but pages can be replaced)
default.master (Old-style master page, as in SP 2007. Without ribbon and other new things. For supporting SP 2007 projects when migrating them)

New Rich Text Editor supports XHTML (source is a valid XHTML)
User Custom Action can be scoped to list / site / site-collection
Multiple forms per type (many New, Display or Edit or other type of forms per List or Library). On of them must be set as default form for each type (New, Display, etc)
Inline adding / editing items in a list (adding / editing items directly from List View, without opening New or Edit form)
Rows conditional formatting in list view
New properties on SPQuery:

SPQuery.Join
SPQuery.ProjectedFields

Use SPLinq instead of CAML to join lists (Building-time error vs runtime error)
Microsoft SharePoint Foundation 4.0 lists can now support 50M items
Unique columns must be indexed (automatically configured)
List Item Validation (Rule with formula. In SharePoint 2007 was possible to validate fields only)
Silverlight Client Object Model

The web part can contain custom properties that are sent to Silverlight via the InitParameter property
The XAP file can be deployed to LAYOUTS and loaded at run time
The Silverlight application can then make use of the Client OM

ECMAScript Client Object Model

ECMAScript Client OM is easily added to SharePoint ASPX page - reference:

_layouts/sp.js

SPMetal utility generates Entities for all site things (Lists, fields, etc) for using them with SharePoint Linq

TechDays 2010 session slides and source code

Fabrice Marguerie — Tue, 09 Feb 2010 15:30:00 GMT

My session about memory leaks in .NET is over. Everything went well.
Thanks Yann. Thanks to everyone who showed up.

You can download the slides and the source code of the sample application (PhotoLight).

Ma session sur les fuites de mémoire en .NET est terminée. Tout s'est bien passé.
Merci Yann. Merci à toutes les personnes qui sont venues.

Vous pouvez télécharger les transparents et le code source de l'application exemple (PhotoLight).

Je pense que l'enregistrement de la session sera rapidement mis en ligne par Microsoft.

Format the email subject in the Elmah Error Logging Module

Jeff Widmer — Tue, 09 Feb 2010 15:16:36 GMT

Elmah error logging modules and handlers for ASP.NET is a great module for logging asp.net errors to many different and configurable repositories. One of the repositories that Elmah works with is email. You can easily set up Elmah to send emails by changing the elmah configuration section in your web.config.

You can find a sample of all the different elmah web.config settings here. The email configuration settings are the following:

<errorMail 
  from="elmah@example.com" 
  to="admin@example.com" 
  subject="..."
  async="true|false"
  smtpPort="25"
  smtpServer="smtp.example.com" 
  userName="johndoe"
  password="secret" 
  noYsod="true|false" />

Only the from and to settings are required. If you leave off the subject attribute you will get the default subject line which is something like this:

Error (System.Exception): This is a test exception

Which is made up of the type of exception followed by the exception message:

Error (Exception.Type): Exception.Message

But did you know you can configure the subject line with these pieces of information and also add something more specific for the application you are working on? For example, I always like the Exception Message in my error email prefixed by the application name and the environment. For example:

My Web Application (STAGING): This is a test exception

You can do that by specifying the String.Format parameters in the configuration section subject attribute like this:

<errorMail 
  from="elmah@example.com" 
  to="admin@example.com" 
  subject="My Web Application (STAGING): {0}"
  />

Now the Exception Message will replace the {0} in the email subject and you can more easily filter the emails that appear in your inbox (hopefully though there will not be so many). You can also include the Exception Type by adding {1} to the subject anywhere you want.

Here is the line of code from the Elmah project:

mail.Subject = string.Format(subjectFormat, error.Message, error.Type).Replace('\r', ' ').Replace('\n', ' ');

Technorati Tags: Elmah

Overriding Inheritance for IIS 6.0 Virtual Directories

adweigert — Tue, 09 Feb 2010 14:46:00 GMT

If you have an IIS site that has a mixture of ASP.NET 1.1 and 2.0 virtual directories below it, changing the root site ASP.NET settings could affect the virtual directory ASP.NET settings as well since IIS inherits except for explicit overrides. This little PowerShell script will take each setting and persist it to the virtual directory so you are able to freely change the root site settings without affecting the applications below it.

Please remember to backup your IIS settings before you do this, just incase it has adverse affects on your IIS server.

function Persist-IIsSettings ( $obj ) {
    Write-Host $obj.Path
    
    $obj.Properties.GetEnumerator() |% {
        $propertyName = $_.PropertyName
        $value        = $obj.Get($propertyName)
        
        if ( -not ($value -is [System.__ComObject]) ) {
            $obj.Put($propertyName, $value)
        }
    }
    
    $obj.SetInfo()

    $obj.Children |% { Persist-IIsSettings $_ }
}

Persist-IIsSettings ([ADSI]"IIS://localhost/W3SVC/1/ROOT")

Visual Studio 2010 RC is out

Jeev — Tue, 09 Feb 2010 13:35:00 GMT

Visual Studio Release Candidate is out. See the post from Scott Guthrie. If you are interested in finding out what are the changes from VS 2008 or .NET 3.5; I strongly suggest that you check out this series of blog posts

Another post from Mike Taulty listing out what is new

Visual Studio 2010 RC is available

DigiMortal — Tue, 09 Feb 2010 09:30:00 GMT

VS2010 RC is out now and available for MSDN users since now. Other guys have to wait until tomorrow when VS2010 RC is made publically available. Reading first news I discovered that most important thing is hardly improved performance of VS2010 RC IDE. All your feedback is welcome to VS2010 RC Connect site.

To find out more follow these links:

Before installing RC you must uninstall all previous versions of VS2010 and .NET Framework 4.0. It seems like another long nights of hacking and discovering new stuff are waiting for us. :)

VS 2010 / .NET 4 Release Candidate

ScottGu — Tue, 09 Feb 2010 07:39:56 GMT

[In addition to blogging, I am also now using Twitter for quick updates and to share links. Follow me at: twitter.com/scottgu]

This afternoon we made available the VS 2010 and .NET 4 release candidates. You can find download links here.

Right now the downloads are available only to MSDN subscribers. Starting Wednesday (Feb 10th) everyone will be able to download them (regardless of whether you are a MSDN subscriber or not).

Background on the Release Candidate

I blogged about us deciding to ship a public VS 2010 release candidate last December. The primary motivation behind releasing a public RC was to ensure that we could get broad testing and feedback on the performance and stability work we’ve been doing since the last public VS 2010 Beta 2 release.

Over the last few months we’ve been releasing interim builds to a small set of folks who have been helping us validate fixes and measure very large projects and solutions. The feedback from them has been extremely positive the last few weeks – which is why we are now opening up today’s build to a much wider set of people to people to try out.

The RC has only been out a few hours so far – but the feedback so far on Twitter has been nice to see:

@DanWahlin: The performance improvements with Visual Studio 2010 RC compared to previous builds are huge. Really happy with what I'm seeing so far.
@peterbromberg: VS2010 RC: I must admit, I am impressed. Major speed and performance improvements. They are obvious immediately!
@Nick_Craver: RC performance is ridiculously faster, can't wait to switch over full time!
@Rlz2cool: Just tried VS2010 RC. One word incredible. Super fast, great build with things I saw in earlier releases fixed. So awesome.
@ddotterer: Trying out VS2010 RC: Snappier UI, much faster intellisense, significant build time reduction, etc. Overall: AWESOME JOB
@tomkirbygreen: Oh my goodness, VS2010 RC is much, much faster. Kudos to the VS perf team and everyone else. Uninstalling Visual Studio 2008 :-)
@JoshODBrown The developers on the Visual Studio 2010 RC must have had their usual beverages replaced with unicorn tears or something. #VS2010 #awesome
@jbristowe: Holy Butterball! VS 2010 RC is crazy fast. It makes me feel like this: http://bit.ly/cPaOvE

Reporting Issues

Our goal with releasing the public RC build today is to get a lot of eyes on the product helping to find and report the remaining bugs we need to fix. If you do find an issue, please submit a bug report via the Visual Studio Connect site and also please send me an email directly (scottgu@microsoft.com) with details about it. I can then route your email to someone to investigate and follow-up directly (which can help expedite the investigation).

If you do install and use the VS 2010 RC we’d also really appreciate if you would fill out this survey about your experiences.

Answers to a few questions and known issues

Here are a few answers to some questions/known issues:

If you have previously installed VS 2010 Beta 2 on your computer you should use Add/Remove Programs (within Windows Control Panel) to remove VS 2010 Beta2 and .NET 4 Beta2 before installing the VS 2010 RC. Note that VS 2010 RC can be installed on the same machine side-by-side with VS 2008 and VS 2005.
Silverlight 3 projects are supported with today’s VS 2010 RC build – however Silverlight 4 projects are not yet supported. We will be adding VS 2010 RC support for SL4 with the next public Silverlight 4 drop. If you are doing active Silverlight 4 development today we recommend staying with the VS10 Beta 2 build for now.
We recently identified a crashing bug that can impact systems that have multi-touch and some screen-readers enabled. We are working on a patch for people who are impacted by it.
We recently found an issue where project upgrades from VS 2008 can take a long time to complete if the project has .xsd files within them. If you think VS is taking a long time on a project upgrade give it a few more minutes to complete before assuming it has hung – you might be running into this slow upgrade issue. Note that once the project is upgraded the performance should return to normal. We are working to fix this with the final release.

Hope this helps,

Scott