Validation of viewstate MAC failed Error

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Some times i am getting following error

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Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

http://go.microsoft.com/fwlink/?LinkID=314055

I have a link button - inside gridview, This link button item command event giving this error, last two years this website have no problem, Now only its happening..

Posted 15-Apr-14 21:00pm

Shajahan Sherafudeen

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Sanket Saxena · Answer 1 · 2014-04-15T21:07:00

Solution 1

I think the solution is already on code project please check it:

Check here

Posted 15-Apr-14 21:07pm

Sanket Saxena