Home / Community & Support / Developer Productivity Tools Forums / ASP.NET AJAX > TabStrip > TabStrip With Multipage - Controls not rendering when Within RadGrid

• Pratik

  Posted on Feb 7, 2012 (permalink)

  Hi,
  
  I have a RadGrid within which I use Tabstrip with Multipage as Edit FormTemplate. But when I Change the tabs (OnTabClick) its throws an Object Reference Error.
  
  Below is the stack Trace of the errror
  
  Source: System.Web
  
  Message: Exception of type 'System.Web.HttpUnhandledException' was thrown.
  
  Stack trace: at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.assetresource_manageresource_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\1d05cdea\b7de89b2\App_Web_d4fj34vj.0.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
  

  Inner Exception

  
  Source: Telerik.Web.UI
  
  Message: Object reference not set to an instance of an object.
  
  Stack trace: at Telerik.Web.UI.RadComboBox.OnInit(EventArgs e) at System.Web.UI.Control.InitRecursive(Control namingContainer) at System.Web.UI.Control.AddedControl(Control control, Int32 index) at System.Web.UI.ControlCollection.Add(Control child) at Telerik.Web.UI.GridPagerItem.InitializePagerItem(GridColumn[] columns) at Telerik.Web.UI.GridPagerItem.SetupItem(Boolean dataBind, Object dataItem, GridColumn[] columns, ControlCollection rows) at Telerik.Web.UI.GridTableView.CreateTopPagerItem(Boolean useDataSource, GridColumn[] copiedColumnSet, Boolean isPagingEnabled, GridTHead thead) at Telerik.Web.UI.GridTableView.CreateControlHierarchy(Boolean useDataSource) at Telerik.Web.UI.GridTableView.CreateChildControls(IEnumerable dataSource, Boolean useDataSource) at System.Web.UI.WebControls.CompositeDataBoundControl.CreateChildControls() at System.Web.UI.Control.EnsureChildControls() at Telerik.Web.UI.GridTableViewBase.get_Controls() at Telerik.Web.UI.GridTableView.GetGridTable() at Telerik.Web.UI.RadGrid.PrepareRowsVisibility(GridTableView view) at Telerik.Web.UI.RadGrid.PrepareItems() at Telerik.Web.UI.RadGrid.ControlPreRender() at Telerik.Web.UI.RadCompositeDataBoundControl.OnPreRender(EventArgs e) at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Control.PreRenderRecursiveInternal() at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  
  Probably the multipage controls are not yet intiated at the time of tabclick. Not sure how this can be resolved. I am using stable release of Telerik Q3 2011
  
  Any support/help is appreciated. Let me know if anyone needs markup/codebehind pasted over here.
  
  Regards,
  Pratik.

  Reply

• Paul Butler

  Posted on Feb 22, 2012 (permalink)

  Hi...
  
  I have the same sort of issue but my issue is within an ASPWizard control.
  
  Does anyone have any idea how we should be fixing this?
  
  Also, this issue is new to .net 4.0 assemblies or one of the later versions of RadControls cause I am only getting this with the newer controls. The required functionality works fine with the version I was using beforehand.
  
  Any help would be appreciated.

  Reply


• John Fetherolf

  Posted on Feb 22, 2012 (permalink)

  We are having the same issue as well.  We have a RadGrid in a RadTabStrip control, but have taken the RadGrid out of the TabStrip.  The Object Reference error that occurs after "Telerik.Web.UI.RadComboBox.OnInit()" still firing.  So, we believe the issue is related to the RadGrid pager.  This seems to have started with the Telerik.UI.dll 2011 Q2 release.
  
  One additional note, we have a custom skin.
  
  Any help would be appreciated.

  Reply

• Paul Butler

  Posted on Feb 22, 2012 (permalink)

  I can confirm that the problem did not exist in v2010.2.929.40.
  
  I have reverted back to that version for now until we have a proper solution.
  

  Reply

• John Fetherolf

  Posted on Feb 22, 2012 (permalink)

  Just an FYI.  We tried upgrading from 2011 Q1 to 2011 Q2 when we noticed the issue for the first time.  Have been using 2011 Q1 for almost a year now with no issue.

  Reply

• Dimitar Terziev Dimitar Terziev

  Posted on Feb 24, 2012 (permalink)

  Hello guys,
  
  We are not familiar with such problem with the latest version of our controls, so in order to troubleshoot it could any of you please open a support ticket and provide a runnable sample which could be debugged and tested locally?
  
  Greetings,
  Dimitar Terziev
  the Telerik team

  If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now.

  Reply

• Alex

  Posted on Feb 29, 2012 (permalink)

  Hi Guys, I have the same issue "

  TabStrip With Multipage - Controls not rendering when Within RadGrid

  "
  did you find a solution for it?
  
  Thanks
  

  Reply

• Oskar Smith

  Posted on Apr 25, 2012 (permalink)

  Im having the same problem, any update to solve this issue?

  Reply

• Dimitar Terziev Dimitar Terziev

  Posted on Apr 27, 2012 (permalink)

  Hi Oskar,
  
  As I've suggested in my previous post, please open a support ticket and provide a runnable sample so we could test it locally in order to identify the cause of the issue that you are experiencing.
  
  Regards
  Dimitar Terziev
  the Telerik team

  If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed now.

  Reply

• Oskar Smith

  Posted on Apr 27, 2012 (permalink)

  Hi Dimitar, I´ve solved this issue validating earlier if the data source is null
  
  Regards

  Reply

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