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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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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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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Dec 8, 2010
I am getting an error : Unable to load Print control with the defalt print option of the report viewer
there is a RSClient.cab which we would need to install to get the print control running in every client but then all the clients in the organization would not have a the admin rights to install it.
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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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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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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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Feb 20, 2011
I have a reportviewer control which is running well on a form. I dont receive any error message. I can pass parameters successfully.The problem starts after placing Reportview control into a grid. I need several reports for different parameters at the same time. In this case, i receive boring "The request failed with HTTP status 401: Unauthorized" error. There is no reason to receive this message as reportviewer working on the form seperate.Is there any restriction not to use ReportViewer in the gridview.codes below.
ASPX
[Code]....
VBA
[Code]....
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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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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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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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Dec 21, 2010
In my master.page I load a Web form:
<script type="text/jscript">$("#LoginInformation").load("LoginInformation.aspx");</script>
But when I have a ListView or DataView, etc... with a pager, I get problems when I click on 'next page'.Then I get the error: Validation of viewstate MAC failed. When I don't use Jquery's load function, I don't get an error.
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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
fv.PageIndex = gv.SelectedIndex + (gv.PageIndex * gv.PageSize); // causes the FormView to use the same selected record as the GridView
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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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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Mar 28, 2011
i am trying to call a report with a ReportViewer control using this code:
[Code]....
but i am having this error
Microsoft.Reporting.WebForms.MissingReportSourceException = the source of the report definition has not been specified.
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Jan 4, 2010
I've got a web app developed in VS 2008, using the .net 3.5 framework.Within the app I've got the reportviewer control. It's pointing to a report built in VS 2005 as my server uses SQL Server 2005, and therefore Reporting Services 2005.When I click the print button on the report viewer toolbar I get "Unable to load client print control".When I go to the report directly (http://servername/reports) and click the print button from there it works.I assume that it's to do with the versions I'm using. I do have the report viewer 2008 installed on the server.What's the best way to fix it? I'd rather not develop the app in VS 2005, but will if that's the only way.
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Jan 7, 2010
I have created a page with a ReportViewer on it and have connected it to our reporting server. The problem is thou i get that error message: "The request failed with HTTP status 401: Unauthorized. "when i try to view it. It only works when i run the project in debug mode in CS 2008.Also my site is based on Integrated Windows authentication.
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Mar 23, 2010
I want to do ReportViewer, and i want have created a DataSet. I fail to drag the data table from ToolBox. My ToolBox doesn't exist any data table. The output i want to archive is something like this in my DataSet
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Jan 19, 2011
i have these message in only one user of my web ASP.NET application.
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey & validation algorithm. AutoGenerate cannot be used in a cluster.
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Nov 9, 2010
After changing the Master Page in ASP.NET MVC 1.0 application, I keep getting this familiar error when I try a postback without filling in the mandatory form elements which are validated by the server:
"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."
The new page refers to a lot of jQuery code with lightboxes, superfish etc. Could that be a problem while doing a postback?
If I revert back to the original master, the error disappears and I'm able to validate form fields. Both masters are located in the same path.
After a little debugging, I've realized that a directive in the master page:
<% Html.RenderAction("menu", "nav"); %>
is creating the problem. The directive asks the "menu" action of the controller "nav" to inject a partial view Menu.ascx. If I delete this line from the new master page, everything works OK. My app's left bar navigation relies on this directive to work properly. Is there any way I can get around this?
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Apr 29, 2010
I am trying a MVC 2 application on my computer's IIS and when I go to a page that contains a form I 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.
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.
------------------------------
What is strange is that on the begining the form is ok but after a while I started to get this error.And why at the start everything was ok and after a while I started to get this error?
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Jan 12, 2011
For many of the pages I build, I don't wish to have the ReportViewer visible until firing an event such as a button click. Using .Net 4.0 and ReportViewer10, however, throws the error "Message: Sys.ArgumentNullException: Value cannot be null. Parameter name: panelsCreated[1]" if you try to keep a panel containing the ReportViewer hidden until after a button click.Since I couldn't find much about this topic online, I'd basically been working around this for some time until I figured out today that if you reset the ReportViewer ReportPath in the code behind in the button click (even if it's the same path as in the aspx page), you can successfully keep the ReportViewer hidden until the button click.
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Jul 6, 2010
I have created many reports in my ASP.Net 3.5 app's and using VB Code-behind. I have the following code that will take the report from the reportviewer and on a click of a button, export it to PDF. So now, I can hide the reportviewer and just have the button click events generate my PDF's. I do not know how to tweak this code to enable me to print directly from another button's click event without the reportviewer being visible.
[Code]....
What I am looking for is how to fill the tableadapter that I am using in the .xsd dataset file to the I do not have to incorporate reportviewers anymore?I know my code above would need to be adjusted so that its not looking at ReportViewer1 for the Report/Data... But I do not know how to do this.
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May 27, 2010
I have a ReportViewer control on an ASP.Net page and an RDLC set up that uses a TableAdapter that pulls one record. This works fine.I'd like to have the *same* RDLC use a different TableAdapter (schema of table is the exact same, but may have multiple records). I've tried putting two DataSets in my RDLC and having the code dynamically select which one to use, but it's not working quite right for me.
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Jul 25, 2010
i am able to bind ds to GridView. So can i also bind ds to reportViewer???I have search online and mostly require to add new DataSet(right-click project ->add new item->DataSet ) and Report(right-click project ->add new item->Report) to bulid the report.Is there a way for me to bind ds to reportViewer like i bind ds to GridView??
[Code]....
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