This post originated from an RSS feed registered with .NET Buzz by Damir Tomicic. Original Post: The "Viewstate is invalid for this page" error message does not provide sufficient information... Feed Title: Damir Tomicic : community powered Feed URL: http://tomicic.de/SyndicationService.asmx/GetRss Feed Description: stuff about .NET, community and life - in several languages. Latest .NET Buzz Posts Latest .NET Buzz Posts by Damir Tomicic Latest Posts From Damir Tomicic : community powered

Es war mir eine große Hilfe, vielleicht hilft es noch jemanden. Die Exceptions sind wesentlich lesbarer und freundlicher:

"... Because View State is stored in a hidden field on a Web page, it is vulnerable to tampering when data is being transferred between the client and the server. To help make View State more secure, ASP.NET validates View State to verify that it came from the correct page. If ASP.NET cannot validate View State, ASP.NET returns a message to the client browser that states that "viewstate is invalid for this page and might be corrupted". However, the message does not describe why View State is not valid. This hotfix provides additional information to help you troubleshoot View State errors. "

This hotfix [1] adds the following information to the error message for View State errors:

• IP address
• Port number
• User-Agent
• Value of the View State
• Http-Referer
• Path of the requested page

[1] http://support.microsoft.com/?id=831150