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Validation of viewstate MAC failed
It was the action attribute on the <form> tag that somehow messed things up. I removed it after the page has loaded and then everything works.
/Peter
Jun 05, 2014 10:43
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Hi!
I'm getting "Validation of viewstate MAC failed" in an IFrameComponent. I've tried disabling EnableViewstateMac, EnableEventValidation, ViewStateEncryptionMode... both on the page, web.config and on the controls. Nothing seems to help. I read that machinekey also could be an issue but it doesn't seem like it in my case.
The error occurs when I click a button that posts to the server. When debugging all values are correct and no exceptions are thrown.
In another IFrameComponent that has an input field and a button the error occurs if I type in the input field and hit enter. If I type and the click the button with the mouse everything works as expected.
I worked around that problem by wrapping the input and button in a panel with the defaultbutton set. Sadly that doesn't work for my new component.
Has anyone else had this problem?
/Peter