ASP.NET Idle Web Page Error

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Dear Experts,

I have an asp.net web page and it has a button to click and once click that button it's getting few results in a data grid view.

My problem is once I load that page via web browser and after 5 minutes once I'm clicked the button it produced following error:

C#

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.

This problem not occur while I'm testing in Visual Studio in my hard drive and before 5 minutes no problem. Problem occur when it's idle for few minutes and start to do a search.

(Not exactly 5 minutes, around something)

Please help me.

Posted 18-Jan-14 6:31am

abdulsafran

Updated 18-Jan-14 8:06am

Sampath Lokuge

v2

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Comments

Wombaticus 18-Jan-14 14:03pm

This is an annoying problem which can be caused by a number of issues. IF you Google it you will find all sorts of advice, none of which helped me. Eventually I stumbled across something that worked, but it may only help you if your application is using the .NET 4 or 4.5 framework - in which case try adding
<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID" />
to the <system.web> section of your web.config file.
If that's not applicable, or doesn't help, try Googling this error - as I say, there is a ton of information out there....

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Sampath Lokuge · Answer 1 · 2014-01-18T08:13:00

Solution 1

Please check the below mentioned links for more info.I hope it'll help to you.

Validation of viewstate MAC failed

Validation of viewstate MAC failed

Validation of viewstate MAC failed

Validation of viewstate MAC failed

Posted 18-Jan-14 8:13am

Sampath Lokuge