Erro em aplicação Asp.net MVC

Question

Pessoal,

boa tarde... estou desenvolvendo uma aplicação usando o framework 3.5 e mvc, deu um erro que não consigo resolver nem a pau..... ele é esse...
Se alguem ai já passou por isso é puder me ajudar fica agraçdecido

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.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: 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.

Source Error:

Line 20: <div id="logindisplay"> Line 21: Line 22: <% Html.RenderPartial("LoginUserControl"); %> Line 23: Line 24: </div>

Source File: d:\Projects\Syscap\Source\AdminWeb\AdminWeb\AdminWeb\Views\Shared\Site.Master    Line: 22

Stack Trace:

[HttpException (0x80004005): Unable to validate data.] System.Web.Configuration.MachineKeySection.GetDecodedData(Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Int32& dataLength) +2657984 System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +203 [ViewStateException: Invalid viewstate. Client IP: 127.0.0.1 Port: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; pt-BR; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4 ViewState: /wEPDwUJOTI0NjcyNTU5ZGQ= Referer: http://localhost:1772/User/NewUser Path: /User/NewUser] [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.ThrowError(Exception inner, String persistedState, String errorPageMessage, Boolean macValidationError) +267 System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) +282 System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) +4 System.Web.UI.Util.DeserializeWithAssert(IStateFormatter formatter, String serializedState) +37 System.Web.UI.HiddenFieldPageStatePersister.Load() +198 System.Web.UI.Page.LoadPageStateFromPersistenceMedium() +83 System.Web.UI.Page.LoadAllState() +35 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7350 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213 System.Web.UI.Page.ProcessRequest() +86 System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18 System.Web.UI.Page.ProcessRequest(HttpContext context) +49 System.Web.Mvc.ViewPage.RenderView(ViewContext viewContext) +87 System.Web.Mvc.ViewUserControl.RenderView(ViewContext viewContext) +150 System.Web.Mvc.WebFormView.RenderViewUserControl(ViewContext context, ViewUserControl control) +60 System.Web.Mvc.WebFormView.Render(ViewContext viewContext, TextWriter writer) +139 System.Web.Mvc.HtmlHelper.RenderPartialInternal(String partialViewName, ViewDataDictionary viewData, IViewEngine engine) +315 System.Web.Mvc.Html.RenderPartialExtensions.RenderPartial(HtmlHelper htmlHelper, String partialViewName) +42 ASP.views_shared_site_master.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in d:\Projects\Syscap\Source\AdminWeb\AdminWeb\AdminWeb\Views\Shared\Site.Master:22 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +98 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20 System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +59 System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +68 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121 System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +37 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20 System.Web.UI.Control.Render(HtmlTextWriter writer) +7 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121 System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22 System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199 System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20 System.Web.UI.Page.Render(HtmlTextWriter writer) +26 System.Web.Mvc.ViewPage.Render(HtmlTextWriter writer) +42 System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25 System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121 System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7350 System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +213 System.Web.UI.Page.ProcessRequest() +86 System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +18 System.Web.UI.Page.ProcessRequest(HttpContext context) +49 ASP.views_user_newuser_aspx.ProcessRequest(HttpContext context) in c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\a7b83c1f\5ad55eca\App_Web_rgyosiqe.0.cs:0 System.Web.Mvc.ViewPage.RenderView(ViewContext viewContext) +87 System.Web.Mvc.WebFormView.RenderViewPage(ViewContext context, ViewPage page) +74 System.Web.Mvc.WebFormView.Render(ViewContext viewContext, TextWriter writer) +105 System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +542 System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ActionResult actionResult) +16 System.Web.Mvc.<>c__DisplayClass13.<InvokeActionResultWithFilters>b__10() +17 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +369 System.Web.Mvc.<>c__DisplayClass15.<InvokeActionResultWithFilters>b__12() +20 System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ActionResult actionResult, IList`1 filters) +372 System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +389 System.Web.Mvc.Controller.ExecuteCore() +177 System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +20 System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +4 System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +123 System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +36 System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +4 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +358 System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +64

Answer 1

Olá Henry,

 

Acho muito esquisito esse erro acontecer, justamente porque não há ViewState no ASP .NET MVC .

 

Por acaso você está utilizando algum server control do ASP .NET?

Pode mostrar como está o ASPX da página que provoca esse erro?

 

De qualquer forma, veja se o artigo abaixo ajuda:

http://blogs.msdn.com/tom/archive/2008/03/14/validation-of-viewstate-mac-failed-error.aspx

 

Abraços,
Caio Proiete

Answer 2

Henry,

só complementando a resposta do Caio, parece que você está misturando WebForms com o MVC Framework... Verifique isso...

 

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Ricardo Oneda
http://oneda.mvps.org/blog

Answer 3

Os dois estavão certos, na minha master page tinha um form com runat = "server", eu tinha uma pag. que tinha uma gridview e não tinha o runat server nessa pag. Ai qdo tirei na master page e coloquei nassa pagina funcionaou....

Answer 4

Ricardo, resolvi o meu problema tirando o runat="server" do meu form e colocando no lugar o using (Html.BeginForm()) {}



Muito obrigado.


[]´s

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Diego Koga