State Management :: Error - Failed To Load Viewstate

Jun 25, 2010

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

But does it have to match across all the seperate apps on the cluster or is it in pairs?

IE... app1 on both clustered servers match or all apps on both servers have the same key?

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Similar Messages:

State Management :: Dynamically Added Controls And 'Failed To Load Viewstate' Error

May 23, 2010

I am writing a search results page for an airline booking system. I have Next/Previous buttons to view flights for the next or previous days. The way i have done my results grid is that i use an HtmlTable and dynamically add rows, cells and controls into the cells. This gives ultimate flexibility given that we can add any control type we want and have it function as it does everywhere else in the system. As you should be aware - i must recreate these controls each time the page is reloaded (in the page_init event) since asp does not handle this automatically.

When they go next/previous it refreshes the flight data and re-populates the grids. If they select a flight in the return grid (by checking the RadioButton), and go next on the FIRST leg grid, the selection of the return leg stays the same after the postback
- which is great. But the problem is, if the flight they selected on the return leg is no longer available it will not create the control and i get the following error;

"Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 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."

Is there any way to tell asp.net that if you do not find the control anymore, simply ignore it rather than throwing the error? The nature of this design is that there potentioally WILL be a different layout after the page is posted back.

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

Oct 9, 2010

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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State Management :: Webpage Error Details / Validation Of Viewstate MAC Failed?

Apr 28, 2010

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)
Timestamp: Wed, 28 Apr 2010 07:39:24 UTC

Message: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 500
Line: 4723
Char: 21
Code: 0
URI: http://www.shoeslocation.com/ScriptResource.axd?d=w3IpLZb6A3e5QHkk7kOTg4vdE8qw_8oIJ-6Kv5NpYYlCqyodfByoMbMvCI7RsUpH3U_p3tMqnuLd_nCq_qPaX4weg2w6s1FlfA_eQbVY-nU1&t=55414254

Before that I used to get the following 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.So I added the following to the Pages tag in the web.config validateRequest="false" enableEventValidation="false" viewStateEncryptionMode ="Never"

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State Management :: Validation Of Viewstate MAC Failed?

Dec 29, 2010

In our control environment, we've started, somewhat intermittently, getting:

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.

on our website.It also suggests:

Source Error: The source code that generated this unhandled exception can only be shown when compiled in debug mode. To enable this, please 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>
<system.web>
<compilation debug="true"/>
</system.web>
</configuration>

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.

We already have compilation debug as true. We have upgraded our website to ASP.NET 4.0, although our middle tier components are still at 3.5. As we do in out production machine configs (which are using ASP.NET 3.5) we have

<section type="System.Web.Configuration.MachineKeySection, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=abcabc123123" allowDefinition="MachineToApplication"/>

we also have one in the new .NET 4.0 machine.config:

<section type="System.Web.Configuration.MachineKeySection, System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=abcabc123123" allowDefinition="MachineToApplication" />

This control environment is not in a server farm. Why is it suggesting that I turn on debug, when it's already on. Why isn't it showing me my source code?

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State Management :: Validation Of Viewstate MAC Failed ...?

Mar 1, 2011

I have this 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.

my website was designed using dotnet 2003 worked under dotnet framework 1.0 the website was working fine then i had to upgrade the server to windows 2008 iis 7.0 so i configured the website to work under dotnet frame work 2.0 and the problem started to show up

i have tried many

enableViewStateMac="false" viewStateEncryptionMode="Never" enableEventValidation="false"
<machineKey validationKey="AutoGenerate,IsolateApps" validation="SHA1" decryption="Auto" decryptionKey="AutoGenerate,IsolateApps" />

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State Management :: Viewstate Verification Failed - Invalid

Aug 9, 2010

I am having this problem with, it seems, Viewstate. This issue only occurs on certain machines, if I browse the website myself it works fine but if another user browses the pages they will lock up and timeout with the error "Viewstate verification failed. Reason: Viewstate was invalid." appering in the event log. Full error is as follows:

Event code: 4009
Event message: Viewstate verification failed. Reason: Viewstate was invalid.
Event time: 8/9/2010 12:09:17 PM
Event time (UTC): 8/9/2010 11:09:17 AM
Event ID: 343dfca250394b109bb5d03b2324f04a
Event sequence: 103
Event occurrence: 4
Event detail code: 50204
Application information:
Application domain: /LM/W3SVC/1/Root/AnseoEnterprise-3-129258250982968750
Trust level: Full
Application Virtual Path: /AnseoEnterprise

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State Management :: DataControlField Does Not Load ControlStyle From Viewstate?

Mar 12, 2011

Using ASP.NET with framework 4.0.30319, changes to the ControlStyle of a ButtonField in a GridView are not saved in Viewstate. Examining the source code suggests that this is because DataControlField.LoadViewstate does not load viewstate for the ControlStyle.

It's possible to work around this by overriding SaveViewState in the closest container and saving the state there.

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State Management :: Avoid Viewstate In Page Load Event?

Aug 30, 2010

I haveMaster Page -> ASPX page -> User ControlUser control page is contains all dynamic bind controls (e.g Repeater) depended on ASPX Page (Only one parameter say ItemNo)The problem is, if I bound user control on page load event with passing respective parameters then it's create to much view state (I checked source file and it's almost 1.5 MB)In other way if I put one textbox, and a command button and I pass required parameter on button click and load the control then page size is ok (I checked and it's < 500KB)

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Forms Data Controls :: GridView CustomWebControl Error For PageSizes Other Than 5/Failed To Load Viewstate

Mar 2, 2010

I'm developing a custom webcontrol from GridView.

I've run into this bizarre situation wherein I get the below error if I set page size other than 5 in the page using this control.

"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."

This GridView is a hierarchial type. I add a new GridView below each row in the webcontrol overriding OnRowDataBound.

If I set pagesize as 5 the paging works properly.

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Forms Data Controls :: Error On Page Index Change In Gridview / Failed To Load Viewstate

Apr 22, 2010

I have gridview control. visit [URL] but when i change page index of this i get error the following error

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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State Management :: Access Viewstate From Error Handler?

May 19, 2010

I'm handling errors from Global.asax - I would like to capture the viewstate of the page that participates in the error. Is there a way to do that?

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State Management :: Viewstate Error After Refreshing Page With Dynamically Loaded Controls

Jan 14, 2011

I have a page that loads a usercontrol dynamically. Depended on the user's actions, this control may be unloaded in Page_PreRender and a different control may be loaded instead. I am attempting to use the solution outlined by Mark DotNet Evans in this post:
http://forums.asp.net/p/1491790/3814320.aspx

This all works great, except if the user clicks the refresh button in the browser just after the change of usercontrol. Then, I get an error

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. ...

I assume the error is caused by the browser re-posting the request with the old viewstate that matched the control tree when the page was loaded, but no longer does. How can I prevent getting an error when the user reloads the page?

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Obout.com ComboBox "Failed To Load Viewstate" Error?

Jan 9, 2011

I have just downloaded Obout.com suite controls for ASP.NET 3.5 and 4.0. I made this because I wanted a DropDown with images near items.It is working well, but, still in the examples, when you set AutoPostBack property to true, and you select an item from the ComboBox controls you get the following error:"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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State Management :: ViewState And ObjectDataSource / Getting Values From Viewstate In GetTopThemes?

Jan 11, 2011

I have problem getting values from viewstate in GetTopThemes.

<asp:ObjectDataSource
ID="sourceGetTopThemes"
runat="server"
TypeName="DBConnection"
SelectMethod="GetTopThemes"
EnableViewState="true"></asp:ObjectDataSource>

[Code]....

}

[Code]....

when the page is not Posted back, I saved all values in the viewstate.

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State Management :: ViewState - Does The Master Page Have Its Viewstate

Apr 30, 2010

I have been getting this error a lot lately with some of my users, and I had a couple of concerns with view state and I have read so many articles but I am still lost..

1. I use masterpage on all the pages and I need viewstate for some of the pages but..

There is a page where a user will fill out the information and then submit this data to a cgi server, and it is where I get most of the Client Disconnected errors, what would happen if I disable viewstate when they click on that button?

Now when a user browses from one page to another, does the view state from the previous page get deleted? If not how would I delete it?

Does the master page have its own viewstate? Would I be able to make sure none of items on my master page are using the viewstate?

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Failed To Load Viewstate?

Apr 29, 2010

Yes, it's the infamous viewstate again! Now I am aware that problems can ocurr if you load controls in the wrong order or if the viewstate IDs are incorrect after postbacks etc etc. But my issue is that I am not really creating any controls dynamically - I only have one user control on the page.

More importantly, the issue seems to be occuring with just one user. What could be the problem? Corrupt browser cache?

ok - so I've narrowed it down a bit more. When I select an item from a drop down list control (which is a UserControl) - and then attempt to rebind my grid using the selected value, the error occurs.

The selectedvalue on postback seems to be zero every time (because the control is not in the viewstate somehow?!). The UserControl (containing the dropdownlist) is added at design-time.

[Code]....

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SQL Reporting :: ReportViewer - Failed To Load Viewstate?

Mar 16, 2011

My app is an ASP.NET 2.0 website. I use UpdatePanel to contain all UserControls. I also use ReportViewer control (local mode) for report function. When user click on "View Report" button, a javascript will be executed to open a new window which contains the ReportViewer control. Everything works well in my pc (Windows XP, IIS 5.1).

However, when I deploy the code to app server (Windows 2k3, IIS 6), I encounter a critical issue. After the report window is opened, whenever I click a button or change value of a DropDownList (UpdatePanel will be reloaded after these actions), an exception "Failed to load viewstate" is thrown.

I've tried to update the Report Viewer Redistributable 2005

(http://www.microsoft.com/downloads/en/details.aspx?FamilyID=e7d661ba-dc95-4eb3-8916-3e31340ddc2c) in the server to SP1 (assembly version: 8.0.50727.817),

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State Management :: How To Custom Controls And ViewState Management

Aug 24, 2010

I want to know that when we create custom controls, then is there State Management through ViewState done automatically or we have to handle it explicitely ?Since i have created Custom Controls that is behaving as if it is not maintaining its state on PostBack.

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C# - Validation Of Viewstate MAC Failed While Submit A Form On Page Load?

Jan 14, 2011

I have a sample page called Redirect.aspx with following content;

<body onload="document.forms.container.submit()">
<form id="container" runat="server" method="post" name="container">
<input type="hidden" value="<%=Request["APP_ID"]%>" name="APP_ID" />
</form>
</body>

the Page_Load method is following:

protected void Page_Load(object sender, EventArgs e)
{
container.Action = Configuration.Instance.PageToRedirect;
}

To this Redirect.aspx page, I'm directed from some external page. In the request context, I have APP_ID key, which is passed from this external page. Next, I want to pass this APP_ID value using POST to some other page, which is defined in the configuration. Unfortunately, I'm getting such error while redirecting:

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.

I don't want to disable view state validation (<pages enableViewStateMac="false">) because this is not the "solution" I want to apply.

Besides I don't understand why I'm getting such an error. Can someone get me through this ? Is there any other way to automatically submit a form on Page_Load event ?

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State Management :: Bug In .NET ViewState

May 20, 2010

I start with a blank ASP.NET page where I disable ViewState for the whole page with EnableViewState=False and even ViewStateMode=Disabled.keep adding various controls to the page -- Label, Table, Calendar, TextBox, DropDownList.Everything looks good, i.e. my __VIEWSTATE tag fluctuates between 24 and 28 characters.As soon as I add a single RadioButton (or CheckBox), the __VIEWSTATE shoots up to 130 characters. And it keeps growing by over 100 characters every time I add another RadioButton.

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State Management :: Set A Certain Viewstate To Nothing?

Apr 19, 2010

I have a code like this in the Me.LoadComplete event.

[Code]....

Now I would like to set this viewstate("data") = nothing on a certain button click in a user control (.ascx) in this page but it doesnt clear the viewstate. What am I doing wrong? In the onClick even of the button in the .ascx I write Me.viewstate("data") = Nothing

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State Management :: Viewstate / Use Textbox Value?

Jul 22, 2010

I want to use textbox value after I visit from current to other page then again to current page using viewstate but value should be the one when I was current page last time.

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State Management :: ViewState Value Set After 2nd Postback?

May 3, 2010

I am creating a simple string of values that get added to a label after a post back. I am setting the values thorugh ViewState. However, my appended values do not get updated until AFTER the 2nd postback. Example:

On Page_Load the label displays a "0";

If I enter a "1" in the text box and click the button the label still displays a "0";

If I click the button again (the 2nd postback) then my label correctly displays "0,1"; This works for whatever value I enter after. i.e. "0,1,35,hello world", etc.

What I am I missing? Code Below.

.ascx - I left out inherits and codebehind

[Code]....

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State Management :: Pop Up Change Viewstate?

Dec 22, 2010

have some viewstate value in my opener window ,when i close the popup i want to set new value in the opener viewstate.

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