验证ViewState MAC失败

Question

Sorry if this is duplicate but I've been going crazy for the past two hours over this.

After changing the Master Page in ASP.NET MVC 1.0 application, I keep getting this familiar error when I try a postback without filling in the mandatory form elements which are validated by the server:

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

The new page refers to a lot of jQuery code with lightboxes, superfish etc. Could that be a problem while doing a postback?

If I revert back to the original master, the error disappears and I'm able to validate form fields. Both masters are located in the same path.

I know a lot of other guys have faced this issue but I was unable to find anything which could help me.

Thanks.

Edited and added

After a little debugging, I've realized that a directive in the master page:

<% Html.RenderAction("menu", "nav"); %>

is creating the problem. The directive asks the "menu" action of the controller "nav" to inject a partial view Menu.ascx. If I delete this line from the new master page, everything works OK. My app's left bar navigation relies on this directive to work properly. Is there any way I can get around this? Very mysterious.

Answer 1

Are you using Html.AntiForgeryToken() anywhere on this page? Sometimes when I am testing locally with multiple different sites and / or port changes this will happen to me. If it does I clear my browser cache and it works just fine.

Answer 2

I did experienced the same problem two days ago . :)

A simple restart of the box has worked in my case so I did'nt investigate further.