Validation of viewstate MAC failed

Question

Message: 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. Source: System.Web Inner Exception:System.Web.UI.ViewStateException: Invalid viewstate. Client IP: 80.79.116.251 Port: 59340 User-Agent: Mozilla/4.0 (compatible; MSIE 7.0b; Windows NT 6.0)
ViewState: 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...
Stack Trace: at System.Web.UI.ViewStateException.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) at System.Web.UI.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) at System.Web.UI.HiddenFieldPageStatePersister.Load() at System.Web.UI.Page.LoadPageStateFromPersistenceMedium() at System.Web.UI.Page.LoadAllState() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpCont ext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.login_aspx.ProcessRequest(HttpContext context) in c:\\Windows\\Microsoft.NET\\Framework\\v2.0.50727\\Temporary ASP.NET Files\\root\\79794658\\835d6695\\App_Web_h5zykaqc.25.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

I tried suggested solution from this article http://blogs.msdn.com/b/tom/archive/2008/03/14/validation-of-viewstate-mac-failed-error.aspx inherit from the BasePage class but I'm still getting occasionally errors above.

I'm using master page and content page so content page inherited from BasePage class. Maybe someone suggest other working solution?

Answer 1

生成机器密钥并将其放入您的web.config http://aspnetresources.com/tools/machineKey中 ，这总是对我有帮助;）