usually when an exception is thrown u get a page saying "Server Error in "/"" (something like that - the main exception message of ASP.NET).

however, I use an updatepanel, and the exceptions which are thrown during the partial update, doesn't show that error page, instead the page is sent back to the browser and the exception is considered as a client-side error and is shown by the browser's status bar

does anyone know how to make the exception thrown from the server?

Ps. can exceptions in web be thrown as in win applications (a yellow line, like debugging steps)?

Weitzhandler,

If your web project is run in debug mode, from the IDE, you can just put a breakpoint in your code the same as in a winforms app.  To get a redirect to an error page, you need to set up a customError page in you web config, and then set the AllowCustomErrorsRedirect  property on your script manager to true.  Here's a good post about your other options for handling asp.net ajax exceptions:

 http://weblogs.asp.net/zeeshanhirani/archive/2008/05/24/handling-errors-in-asp-net-ajax.aspx

James

can't I just get such a page:

Line 10: 	'lblItemsInCart
Line 11: 	Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Line 12: 		Response.Write(Int32.Parse("sdf"))
Line 13: 
Line 14: 

[FormatException: Input string was not in a correct format.]
   System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal) +7467367
   System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info) +119
   System.Int32.Parse(String s) +23
   **.Page_Load(Object sender, EventArgs e) in E:\Projects\************.aspx.vb:12
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   wc.BasePage.OnLoad(EventArgs e) in E:\Projects\*****************.vb:80
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

When an error occurs during partial-page updates in UpdatePanel controls, the default behavior is that a browser message box is displayed with an error message.

http://asp.net/ajax/documentation/live/tutorials/CustomizingErrorHandlingforUpdatePanel.aspx

In server code you can customize error handling by setting the AsyncPostBackErrorMessage property and handling the AsyncPostBackError event of the ScriptManager control. In client code you can customize error handing by handling the endRequest event of the PageRequestManager class.