Invalid viewstate.

[Mandar Saoji]

Hello Experts,

I found so many below enteries in my server's Event Log.
Please let us know what is this and will it affect any further.

Exception information:
    Exception type: HttpException
    Exception message: Invalid viewstate.

--------------------------------------------------
Event Type: Warning
Event Source: ASP.NET 2.0.50727.0
Event Category: Web Event
Event ID: 1309
Date:  7/9/2010
Time:  4:31:51 PM
User:  N/A
Computer: zCon-25
Description:
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 7/9/2010 4:31:51 PM
Event time (UTC): 7/9/2010 11:31:51 PM
Event ID: 4941ea0cd25f420cbbb8f4161e4e6b0e
Event sequence: 51426
Event occurrence: 270
Event detail code: 0
 
Application information:
    Application domain: /LM/W3SVC/1/Root/zCon-9-129229739136548100
    Trust level: Full
    Application Virtual Path: /zCon
    Application Path: C:\Inetpub\wwwroot\zCon.Net\
    Machine name: zCon-25
 
Process information:
    Process ID: 4148
    Process name: w3wp.exe
    Account name: zCon\SGupta
 
Exception information:
    Exception type: HttpException
    Exception message: Invalid viewstate.
 
Request information:
    Request URL: http://zCon-25/Ventures/WebResource.axd?d=qP0xs7JwfD7vLDM_
    Request path: /zCon-25/WebResource.axd
    User host address: 206.111.236.194
    User: lgant
    Is authenticated: True
    Authentication Type: Forms
    Thread account name: zCon\SGupta
 
Thread information:
    Thread ID: 11
    Thread account name: zCon-25\SGupta
    Is impersonating: True
    Stack trace:    at System.Web.UI.Page.DecryptStringWithIV(String s, IVType ivType)
   at System.Web.Handlers.AssemblyResourceLoader.System.Web.IHttpHandler.ProcessRequest(HttpContext context)
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
 
 
Custom event details:

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

[Simon]

Hi Mandar Saoji,

This error may not be directly related to RadControls for ASP.NET AJAX.

Please see these two threads discussing the same issue in StackOverflow for more information:

• Invalid viewstate error
• Erratic Invalid Viewstate issue in a .NET application

Kind regards,
Simon
the Telerik team