Want to win a PS4? Go Premium and enter to win our High-Tech Treats giveaway. Enter to Win

x
?
Solved

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. AutoGenera

Posted on 2008-10-08
4
Medium Priority
?
2,401 Views
Last Modified: 2012-08-13
Hi,

I am getting the following  error message...I have visual studio 2008 with sp1 and  .net framework 3.5,3.0 and 2.0 also....

I tried to to modify web.config by using
 ViewStateEncryptionMode="Never"
    EnableViewStateMac="false" EnableEventValidation="false" ...

I also add Machine key  tag in web.config still problem is there ........

I have one user control from which a pop up window get opened and when I hit any button or after postback i am getting this errror please help me.............

I am in trouble..........

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.
0
Comment
Question by:ShaileshShinde
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
4 Comments
 
LVL 27

Expert Comment

by:Sammy Ageil
ID: 22670488
Try using the PostBackUrl property instead of the normal postback
this should be done on the user control
Example myButton.PostBackUrl = "mypage.aspx";

post the code the control is using to open the page



0
 
LVL 1

Author Comment

by:ShaileshShinde
ID: 22684600
what u r talking about ? i am getting this error

I am getting the following  error message...I have visual studio 2008 with sp1 and  .net framework 3.5,3.0 and 2.0 also....

I tried to to modify web.config by using
 ViewStateEncryptionMode="Never"
    EnableViewStateMac="false" EnableEventValidation="false" ...

I also add Machine key  tag in web.config still problem is there ........

I have one user control from which a pop up window get opened and when I hit any button or after postback i am getting this errror please help me.............

I am in trouble..........

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.
0
 
LVL 1

Accepted Solution

by:
AugustReign earned 1500 total points
ID: 22754721
Try adding enableViewStateMac="false" to the <pages> tag in your web.config as well.  For example:
<pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode ="Never" enableViewStateMac="false">

Open in new window

0
 
LVL 1

Expert Comment

by:code4food
ID: 22854171
AugustReign,
 That did the trick for me! Good going! I am not the author of the original question, but I was looing for an answer to that very same problem and it worked perfectly. Thanks a million!
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
Video by: ITPro.TV
In this episode Don builds upon the troubleshooting techniques by demonstrating how to properly monitor a vSphere deployment to detect problems before they occur. He begins the show using tools found within the vSphere suite as ends the show demonst…
Want to learn how to record your desktop screen without having to use an outside camera. Click on this video and learn how to use the cool google extension called "Screencastify"! Step 1: Open a new google tab Step 2: Go to the left hand upper corn…

597 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question