Eilon Lipton's Blog - All Comments

Run a Http Response Filter together with an Ajax Update Panel

Erik Lenaerts — Fri, 29 Aug 2008 19:46:05 GMT

This post continues from part one . In this previous post we created a Http Response Filter that translated

re: Sys.WebForms.PageRequestManagerParserErrorException - what it is and how to avoid it

Vince Miccio — Fri, 29 Aug 2008 13:17:12 GMT

Thanks - I was using a button in an update panel to kick off a Crystal Report via an ExportToHttpResponse call to open the report as a PDF file. One of the arguments to the function is the Response object. I got the parser error exception until I added the postback trigger as mentioned in RiskyT's comment.

This is the reason I keep using and recommending Microsoft's products. I was able to find this solution to a nasty problem in just a few minutes of Googling. I feel comfortable I won't be left out there dangling in the wind. Great job all!

-->Vince

Handling Null Database Values Using Data Source Controls

Maíra Wenzel's Blog — Fri, 29 Aug 2008 01:38:42 GMT

This topic Handling Null Database Values Using Data Source Controls has now been updated on MSDN to fix

re: Sys.WebForms.PageRequestManagerParserErrorException - what it is and how to avoid it

RiskyT — Tue, 26 Aug 2008 21:12:20 GMT

I got this error while doing some coding that didn't actually require a Response.Write, but the UI worked a lot better if I did it that way. It's a modal popup in an iFrame that needs to do something, and on success it writes out javascript to close itself.

The page uses several updatepanels to update various parts of the form, then on AddToCart it does a complete page postback.

I got this to work by putting this in the update panel that caused the page postback:

<asp:PostBackTrigger ControlID="pricingHeader" />

</Triggers>

Hope that helps someone.

re: Sys.WebForms.PageRequestManagerParserErrorException - what it is and how to avoid it

Jilani — Sat, 23 Aug 2008 09:42:13 GMT

hi, in my client site its not showing but my client getting this message they got “thin Client Environment”

i didnt use Response.Write(). but still getting my client following message:

"Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.

Details: Error parsing near ‘

<!DOCTYPE HTML PUB’."

can anyone tell me whats the reason?? its urgent

re: MVC: Locking the RouteCollection

Bruce Pierson — Thu, 21 Aug 2008 06:01:58 GMT

I have a thread safe dictionary that uses ReaderWriterLockSlim. I decided your method made things more explicit, so I set my dictionary to be "thread-unsafe", added the GetXXLock() methods and ran it in a test method. Here's the test method:

[TestMethod]

public void TestSafeDictionary()

{

Random rand = new Random(1000);

ISafeDictionary<string, string> dict =

new SafeDictionary<string, string>();

dict.SetSafety(ThreadSafeType.None);

for (int i = 0; i < 50; i++)

{

Thread tenum = new Thread(

o =>

{

using (dict.GetReadLock())

{

foreach (object item in ((IEnumerable)o))

Thread.SpinWait(10000);

}

});

Thread tmutate = new Thread(

o =>

{

using (dict.GetWriteLock())

{

IDictionary<string, string> d = o as IDictionary<string, string>;

string randKey = rand.Next().ToString();

if (!d.ContainsKey(randKey))

d.Add(randKey, randKey);

}

});

Thread tenumkeys = new Thread(

o =>

{

using (dict.GetReadLock())

{

foreach (string key in ((IDictionary<string, string>)o).Keys)

Thread.SpinWait(10000);

}

});

Thread tenumvals = new Thread(

o =>

{

using (dict.GetReadLock())

{

foreach (string key in ((IDictionary<string, string>)o).Values)

Thread.SpinWait(10000);

}

});

tenum.Start(dict);

tmutate.Start(dict);

tenumkeys.Start(dict);

tenumvals.Start(dict);

}

This test resulted in a massive cascade of exceptions, all the same type:

"One of the background threads threw exception: System.Threading.SynchronizationLockException: The lock is being disposed while still being used. It either is being held by a thread and/or has active waiters waiting to acquire the lock.

at System.Threading.ReaderWriterLockSlim.Dispose(Boolean disposing)

at System.Threading.ReaderWriterLockSlim.Dispose()"

So it appears the using() statement will be a non-starter in a true multi-threaded environment.

re: Using ObjectDataSource to do the dirty work for your custom data source

fairbanj — Wed, 20 Aug 2008 22:46:41 GMT

The problem I am having is the way that ObjectDataSource is when passing in a DataSet. The selection works great, but the update requires a method on the object that has all the parameters in the updated row... why not just return a DataRow? This makes it impossible for me to use a generic object over different tables. I even tried to use the params keyword to allow a variable parameter list and it still barfs. Very frustrating.

re: Sys.WebForms.PageRequestManagerParserErrorException - what it is and how to avoid it

BlueG — Tue, 19 Aug 2008 12:12:26 GMT

Can someone give me a tip for solving this problem?:

I have textbox with user login, button "OK" and updatePanel with label (error messages).

I change login, hit "OK". Server checks, if changed login is available (must be unique).

- if no, error is shown /* { lblError.Visible=true; updPnlError.Update() } */ - THIS WORKS FINE

- if login is available, i save change and than I WANT TO REDIRECT TO ANOTHER PAGE - How can i do that?? (In (STUPID) IE7, Server.Transfer() and Response.Redirect() don't work - both shows the PageRequestManagerParserErrorException)

Thx..

Sys.WebForms.PageRequestManagerParserErrorException

cnblogs.com — Tue, 12 Aug 2008 08:41:44 GMT

最近需要用timer局部刷新label，是用.NET 2008的AJAX 扩展的 ScriptManager ， ScriptManager ，Timer控件，结果在运行的时候就出现异常： Microsoft

re: MVC: Unit testing controller actions that use TempData

Haacked — Sun, 10 Aug 2008 19:12:06 GMT

This post is now out-dated due to MVC Preview 4 which makes testing TempData much easier.