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A solution for the Sys.Webforms.PageRequestManagerServerErrorException problem

Posted By:      Posted Date: October 21, 2010    Points: 0   Category :ASP.Net

I was receiving the Sys.Webforms.PageRequestManagerServerErrorException error with an ASP.NET AJAX project I was working on.  I searched the Forums and other sources and found some common recommendations, but none worked.  Here's a summary of the cause and solution:

1) The web.config had the customErrors tag mode="RemoteOnly" and a custom Error page.  This caused the exception to happen with server deployments, but not show itself with local development environments.

2) The custom Error page causes the Response to AJAX Request to be altered and therefore causing the PageRequestManagerServerErrorException

3) Setting the AllowCustomErrorsRedirect="false" on the ScriptManager prevents the custom Error page from being used with AJAX Requests - http://msdn.microsoft.com/en-us/library/system.web.ui.scriptmanager.allowcustomerrorsredirect.aspx.

4) Define an OnAsyncPostBackError event handler on the ScriptManager to handle exceptions and set the OnAsyncPostBackErrorMessage to a user friendly error message the can be displayed to the user - http://msdn.microsoft.com/en-us/library/system.web.ui

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Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while
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Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the



 I am using Ajax RC 1.0

Initially my application was simple ASP.NET 2.0 application and later on client decided for implementing AJAX.

My form is containg datagridview inside UpdatePanel and one textbox also. datagridview is having all rows editable. I have master page implemented.

I am updating records on lost focus of any text box(inside datagridview  and outside also) 

Problem is that I am able to run my application locally without any problem. But when I am publishing my website on server it is giving me following error:

Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 500

I have uploaded following DLL's on server: AjaxControlToolkit.dll, AJAXExtensionsToolbox.dll, Microsoft.Web.Extensions.Design.dll and Microsoft.Web.Extensions.dll

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I am using VS2005, .net2.0, Ajax with Oracle 11g and ODP.Net. I have a report that I am calling from .aspx page.
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