Exception log -- could not handle

Category: ASP.NET
09 Mar 2016 04:14
Joined: 18/10/2011
Level: Bronze
Points: 14
Points: 5
Exception log -- could not handle
Hi

I am getting below error in exception log table... Please let me know the solution. Thanks.

ASP.NET session has expired or could not be found AspNetSessionExpiredException at Microsoft.Reporting.WebForms.ViewerDataOperation..ctor()
at Microsoft.Reporting.WebForms.HttpHandler.GetHandler(String operationType)
at Microsoft.Reporting.WebForms.HttpHandler.ProcessRequest(HttpContext context)
at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

http://abc/Reserved.ReportViewerWebControl.axd?OpType=SessionKeepAlive&ControlID=0d2e9ff348de4955923 2016-03-09 12:43:41.793 Microsoft.Reporting.WebForms.ViewerDataOperation
#765084
09 Mar 2016 09:10
Joined: 13/06/2007
Level: Gold
Points: 20603

Points: 3
This error occurred If you set KeepSessionAlive to false, the user session is kept active as long as the user interacts with the Web page. The user session will expire after a period of inactivity in the Web page. If the ASP.NET session expires, the message "ASP.NET session has expired or could not be found" is displayed when the user interacts with the ReportViewer again
Have you set 'KeepSessionAlive ' to false any where ? if yes then remove that attribute
Thanks
Koolprasd2003
Editor, DotNetSpider MVM
Microsoft MVP 2014 [ASP.NET/IIS]
#765087
09 Mar 2016 10:19
Joined: 03/05/2013
Level: Gold
Points: 15349
Points: 3
Hi,

While Generating Report viewers sometimes session may expire due to several reasons, to overcome this we have 2 options one is KeepSessionAlive to false and another one is to keep session alive at handler side by call some script over there, refer below link this might be helpful to you.

morrenth.com/handle-error-aspnet-session-has-expired-or-could-not-be-found-at-microsoftreportingwebformsviewerdataoperation.aspx
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N@veen
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#765093
09 Mar 2016 11:04
Joined: 18/10/2011
Level: Bronze
Points: 14
Points: 1
There is no 'KeepSessionAlive' attribute in my code.
Should I increase the timeout value somewhere in the reports?

Joined:	18/10/2011
Level:	Bronze
Points:	14

Joined:	13/06/2007
Level:	Gold
Points:	20603

Joined:	03/05/2013
Level:	Gold
Points:	15349

Joined:	18/10/2011
Level:	Bronze
Points:	14

Exception log -- could not handle

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