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ViewStateException: Invalid viewstate loadViewstate function

Proposed ViewStateException: Invalid viewstate loadViewstate function

  • quinta-feira, 31 de maio de 2012 09:30
     
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    I had an error with ViewState, I called the Submit function in javascript to submit a form in asp.net and set target = "_blank" in the form tag to it open a new windows when submitting. 

    But when submitting, the page that is opened occurs an error with viewstate. 

    [ViewStateException: Invalid viewstate. 
	Client IP:
	Port:
	Referer: 
	Path: 
	User-Agent: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.162 Safari/535.19
	ViewState: 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...]

[HttpException (0x80004005): 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.]
   System.Web.UI.ViewStateException.ThrowMacValidationError(Exception inner, String persistedState) +11361534
   System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +11361969
   System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) +60
   System.Web.UI.HiddenFieldPageStatePersister.Load() +11362247
   System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +11442359
   System.Web.UI.Page.LoadAllState() +56
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +11436386
   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +11435902
   System.Web.UI.Page.ProcessRequest() +269
   System.Web.UI.Page.ProcessRequest(HttpContext context) +167
   ASP.t2_cert_mycertificate_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\cert\37249763\f5a891e8\App_Web_3ivgjqvh.9.cs:0
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +625
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +270

    can someone tell me why it occurs this error ? and how to fix it. I tried many way to fix but it doesn't affect. 

    I guess the page that receives data cannot parse ViewState of some controls.

     

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