Validation of viewstate MAC failed in Asp.net?

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SQL-Server-2012

error occur in asp.net

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.

Posted 5-May-14 23:51pm

RajeeshMenoth

Updated 6-May-14 19:50pm

v2

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3 solutions

Solution 1

follow the link for more info:

Validation of viewstate

To fix this need to set the EnableViewStateMAC property to false.

else you can also try this:

how-to-fix-the-validation-of-viewstate

Hope it helps :)

Posted 5-May-14 23:55pm

Sanket Saxena

Updated 6-May-14 0:13am

v2

Comments

[no name] 6-May-14 5:59am

EnableViewStateMAC its not secure for all time

Sanket Saxena 6-May-14 6:09am

did it resolves your issue or not?

[no name] 6-May-14 6:11am

no.still trying.

Sanket Saxena 6-May-14 6:13am

alright see my updated ans... a new link added.

[no name] 6-May-14 6:18am

ya i saw ur article i couldn't understand anything

Sanket Saxena 7-May-14 2:22am

The solution you have accepted is the same what is explained in the link i have shared. Generate a new machine key and applied over there. Good luck buddy :)

Solution 2

If you have more than one server that hosts your ASP.NET app, you should use the same machine key on all the servers. Otherwise, when a page served by one server posts back to another server, the second server will not be able to validate the viewstate.

Check this link for more information.
http://msdn.microsoft.com/en-us/library/ms998288.aspx[^]

Posted 5-May-14 23:58pm

Shameel

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RajeeshMenoth · Accepted Answer · 2014-05-06T19:33:00

HTML

<machineKey validation="SHA1" validationKey="A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1B2C3D4E5" decryption="Auto" decryptionKey="A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1"/>

I was wrote this code in vs2012 ultimate.u can wrote this code in wbconfg...