null exception in program.cs due to show dialog

3 posts, 0 answers
  1. Harshvardhan
    Harshvardhan avatar
    4 posts
    Member since:
    May 2012

    Posted 09 May 2012 Link to this post

    Hi Team,

    I have been facing this issue, whenever i show a dialog or a messagebox in the valuevalidating event . I get a null exception error in
    the program.cs file . but this does not occuur if i show the dialog in anyother event .please let me know the solution for this.

  2. Harshvardhan
    Harshvardhan avatar
    4 posts
    Member since:
    May 2012

    Posted 09 May 2012 Link to this post

    Here is the detailed exception tht is thrown

    System.NullReferenceException was unhandled
      Message=Object reference not set to an instance of an object.
           at Telerik.WinControls.UI.RadTreeViewElement.EndEditCore(Boolean commitChanges)
           at Telerik.WinControls.UI.TreeViewTextBoxEditor.OnKeyDown(KeyEventArgs e)
           at Telerik.WinControls.UI.BaseTextBoxEditor.TextBoxItem_KeyDown(Object sender, KeyEventArgs e)
           at System.Windows.Forms.KeyEventHandler.Invoke(Object sender, KeyEventArgs e)
           at Telerik.WinControls.RadItem.OnKeyDown(KeyEventArgs e)
           at Telerik.WinControls.UI.RadTextBoxItem.TextBoxControl_KeyDown(Object sender, KeyEventArgs e)
           at System.Windows.Forms.Control.OnKeyDown(KeyEventArgs e)
           at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
           at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
           at System.Windows.Forms.Control.WndProc(Message& m)
           at System.Windows.Forms.TextBoxBase.WndProc(Message& m)
           at System.Windows.Forms.TextBox.WndProc(Message& m)
           at Telerik.WinControls.UI.HostedTextBoxBase.WndProc(Message& message)
           at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
           at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
           at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
           at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
           at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
           at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
           at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
           at System.Windows.Forms.Application.Run(Form mainForm)
           at Cognizant.iFrame.UI.Program.Main() in D:\ACoE R&D Team Member\Harsh\development projects\iFrame2.0 new\Source Code\iFrame2.0\Cognizant.iFrame.UI\Program.cs:line 16
           at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
           at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
           at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
           at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
           at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
           at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
           at System.Threading.ThreadHelper.ThreadStart()
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  4. Jack
    Jack avatar
    2335 posts

    Posted 14 May 2012 Link to this post

    Hello Harsh,

    I am not able to reproduce this issue when using our latest release - Q1 2012 SP1. I recommend you to test this version. If the issue continues to appear, please send us your code and we will research the issue in detail. Thank you in advance.
    Kind regards,
    the Telerik team
    RadControls for WinForms Q1'12 release is now live! Check out what's new or download a free trial >>
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