Forms Data Controls :: Viewstate MAC Failed Error -- With A Weird Twist?

Mar 8, 2011

I'm getting the old "Validation of viewstate MAC failed" error when I click the submit button on my form. (Seehttp://blogs.msdn.com/b/tom/archive/2008/03/14/validation-of-viewstate-mac-failed-error.aspx) The thing is I'm getting the error even when the page is completely loaded (it can be sitting there for five minutes before I hit submit but I still get the error). This isn't even a particularly lengthy page (which is one of the preconditions). It uses a DetailsView (which I understand is another precondition for this error), but it's the only databound control on the page. Also, whenever users get this error (which is 100% of the time when they click Submit), they lose their login authentication and have to log back in. This page/site has been in use for about six months but the error suddenly started a few weeks ago without any changes being made to the code.

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I'm developing a custom webcontrol from GridView.

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"Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request."

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Web Forms :: Validation Of Viewstate MAC Failed - How To Fix This Error

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I have simply created two aspx pages for testing purpose, Page1.aspx and Page2.aspx.

Page1.aspx code is as follows:

[Code]....

And Page2.aspx simply have this code:

[Code]....

Now,when i run Page1.aspx and press the button i am getting this error. Can anyone tell me why this error is occuring ?

ERROR:

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
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I have an application that works fine, problem rise when a page is waiting for the user response for more than 20 min and then user click a link on the form. The application response with the following error -

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Error - Validation Of Viewstate MAC Failed

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I don't know what is causing this. The weird thing is, eventually, it goes away (as in, i get to see the web application form), BUT my web app does not work properly. I have image buttons that are not showing the image that I set at imageButton.ImageUrl. It works fine when I run it on my local machine (IIS), but when I try it on one of those free hosting sites, it will go as far as showing the interface (which has the image buttons), but when I click, it suppose to be set with an image.

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Validation Of Viewstate MAC Failed / How To Repair This Error

Aug 19, 2010

have this error in server..

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. 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:

The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, follow one of the below steps, then request the URL:

1. Add a "Debug=true" directive at the top of the file that generated the error. Example:

<%@ Page Language="C#" Debug="true" %>

or:

2) Add the following section to the configuration file of your application:

<configuration>
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<compilation debug="true"/>
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Note that this second technique will cause all files within a given application to be compiled in debug mode. The first technique will cause only that particular file to be compiled in debug mode.

Important: Running applications in debug mode does incur a memory/performance overhead. You should make sure that an application has debugging disabled before deploying into production scenario.

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When i keep the .aspx page open or iden for long period on browser and then clicks on button after some time , it shows me the

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when i run my project i got bellow error...

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I read you can set matching keys in web.config files across a cluster.

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I deploy a simple web app,that works fine on my local system, on a remote server. The webform consist of a Menu control and a Listview control. If I browse the page and then leave it for like 20 minutes untouched and then try to select an entry from the menu I am getting the following error -

Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; InfoPath.1; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; AskTB5.6)
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Before that I used to get the following error -

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if my website when session of user expire i get the following error.

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Configuration :: Error Message After Page Is Idle For 10 Minutes / Validation Of Viewstate MAC Failed

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I have a problem in my web site ...

When ever i left my website idle ...

The following message is displayed ...

After this message is displayed , no pages is able to access ....

The error message is :

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

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Jun 12, 2010

I have a FormView and a GridView connected to the same datasource inside of a MultiView where one view is for the grid and the other for the form. The GridView has selection enabled and when the user selects a record in the GridView I make sure that the same record is selected in the FormView.mv.ActiveViewIndex = vIndexForm; // causes the MultiView to change views from the grid to the form
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This should cause a PageIndexChanged event (it doesn't), so I called by event handler explicitly. In the event handler I change the mode to FormViewMode.Edit. This should cause a ModeChanged event (again it doesn't), so again I called it explicitly.Finally in the ModeChanged event I get the DataItem for the FormView so that I can update some special fields that require some special formatting, however fv.DataItem is null which means I can't do any special formatting. At this point the FormView shows and the regular fields are fine. If I now hit the Cancel button the FormView fires the ChangedMode event at which point I changed the MultiView's ActiveViewIndex back to the view with the grid. The grid displayes just fine, but if I do a select of a row within the GridView again I get the "Failed to load viewstate" error.I can only assume that I'm either doing something in the wrong order or at the wrong time and it's tripping me up.

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Forms Data Controls :: Failed To Load Viewstate When Gridview Control - Replace Gridview With Datagrid

Apr 5, 2010

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

The above error occurs with gridview control , when used with template field columns with item template / and edit templates etc.
updating a row within gridview, at the time of loadiong it loads perfectly fined, but when tried to modify an existing row within gridview control, then it produces the error. Make sure the grid view control has to be a child control which manages the child table info with in a master form. to reproduce the above problem the grid view must be loading the child records info of a master within the masterform, meaning both master data and gridview data all to be managed in one single form.

I had to replace gridview control with datagrid and then it worked perfectly fine. I wasted almost 4 days of my time., there is no way we could figure out the problem. here is the full info of the problem.

Server Error in '/' Application.

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

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: Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

Source Error:

[Code]....

Stack Trace:

[HttpException (0x80004005): Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.] System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +306 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134 System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221 System.Web.UI.Page.LoadAllState() +312 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661

Version Information: Microsoft .NET Framework Version:2.0.50727.3603; ASP.NET Version:2.0.50727.3082

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State Management :: Failed To Load Viewstate. The Control Tree Into Which Viewstate Is Being Loaded Must Match ?

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Now here is the weird thing. First i am running it locally on the built in vs2008 web server.I load my control in fine, do a postback from a linkbutton, locally on my machine it all works fine, no issue.However when it goes onto my host, it falls over with the message:

Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.Now i also load controls dynamically and use postbacks and things in the admin area of the site...and that works fine, however my front end just keeps failing? See the code behing below:

[Code]....

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I'm getting the following error in our QA environment but only through the IIS7 reverse proxy. If I hit the application server directly it works fine. In our DEV environment it works fine through the proxy or directly.

I'm not really sure where to go with this,
Server Error in '/' Application.

Padding is invalid and cannot be removed.

Description: An unhandled exception occurred during the execution of the current web request.

Exception Details: System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed.

Source Error:An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:[CryptographicException: Padding is invalid and cannot be removed.]
System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset,
[code]....
Version Information: Microsoft .NET Framework Version:2.0.50727.4952; ASP.NET Version:2.0.50727.4927

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Web Forms :: Validation Of Viewstate MAC Failed?

Sep 2, 2010

this avoids a MAC error

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.

I add this to webconfig and it works

<pages validateRequest="false" enableEventValidation="false" viewStateEncryptionMode="Never" enableViewStateMac="false">

why does it work and what an earth is this error as it makes no sense to me. it is to do with sessions.

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[Code]....

Forms Data Controls :: Failed to convert parameter value from a DataControlFieldCell to a String - GridView Error?

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This is the Firefox error console window when I clicked on any page.

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[URL]

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[Code]....

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[Code]....

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[Code]....

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