Re: view state mac failed

Hi Nalaka,

Thanks for your response.

The ASP.NET's ViewState is by default persisted through the

<input name="__VIEWSTAT" ... />

html hidden field. Therefore, it is likely that the commision Unction
scripts has corrupt the hidden field's value. If you can build a very
simple page to reproduce the problem, you can view the page's client-side
html source (in web browser) and check those client scripts to see whether
any of them is accessing the hidden form element.

Another troubleshooting approach is use some http trace tools (such as
fidder or tcptrace or trace utility) to capture the page's http request/
response. We can verify the <input name="__VIEWSTAT" ... /> value after it
is sent to client and before it is postback again to server. If there
value is different, there is certainly some client-script that has modified
it.

Hope this helps some.

Regards,

Steven Cheng
Microsoft MSDN Online Support Lead


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