CellBeginEdit

[David Storey]

Hi,

Ive created a grid, one of my columns in the grid is a GridViewLookupColumn.  Ive subscribed to the CellBeginEdit event because I want to prevent users from editing certain cells.  When the condition is met in the event handler I set e.Cancel to true so that the editor is not displayed.  All works fine until the form is closed (disposed), I then get the following exception (stack trace), can somebody help please?

   at Telerik.WinControls.UI.PopupEditorBaseElement.ClosePopup(RadPopupCloseReason reason)

   at Telerik.WinControls.UI.PopupEditorBaseElement.DisposeManagedResources()

   at Telerik.WinControls.UI.RadComboBoxElement.DisposeManagedResources()

   at Telerik.WinControls.DisposableObject.PerformDispose(Boolean disposing)

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.UI.GridViewEditManager.Dispose()

   at Telerik.WinControls.UI.RadGridView.savedForm_FormClosed(Object sender, FormClosedEventArgs e)

   at System.Windows.Forms.Form.OnFormClosed(FormClosedEventArgs e)

   at System.Windows.Forms.Form.CheckCloseDialog(Boolean closingOnly)

   at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FContinueMessageLoop(Int32 reason, Int32 pvLoopData, MSG[] msgPeeked)

   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(Int32 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.RunDialog(Form form)

   at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)

   at TelerikDataGridView.Form1.radGridView1_CellDoubleClick(Object sender, GridViewCellEventArgs e) in C:\Documents and Settings\dms\My Documents\Visual Studio 2008\Projects\TelerikDataGridView\TelerikDataGridView\Form3.cs:line 96

   at Telerik.WinControls.UI.RadGridView.OnCellDoubleClick(Object sender, GridViewCellEventArgs e)

   at Telerik.WinControls.UI.RadGridView.OnMouseDoubleClick(MouseEventArgs e)

   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

   at Telerik.WinControls.RadControl.WndProc(Message& m)

   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(Int32 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.RunDialog(Form form)

   at System.Windows.Forms.Form.ShowDialog(IWin32Window owner)

   at TelerikDataGridView.Form4.button1_Click(Object sender, EventArgs e) in C:\Documents and Settings\dms\My Documents\Visual Studio 2008\Projects\TelerikDataGridView\TelerikDataGridView\Form4.cs:line 23

   at System.Windows.Forms.Control.OnClick(EventArgs e)

   at System.Windows.Forms.Button.OnClick(EventArgs e)

   at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)

   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ButtonBase.WndProc(Message& m)

   at System.Windows.Forms.Button.WndProc(Message& m)

   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(Int32 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 TelerikDataGridView.Program.Main() in C:\Documents and Settings\dms\My Documents\Visual Studio 2008\Projects\TelerikDataGridView\TelerikDataGridView\Class1.cs:line 16

   at System.AppDomain._nExecuteAssembly(Assembly 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)

   at System.Threading.ThreadHelper.ThreadStart()

[Martin Vasilev]

Hi David Storey,

I have already answered your question in your first support ticket, but I'm just posting the answer here for the community:
 
The issue will be addressed in some of the next releases. Currently, there is a work-around using EndEdit method and canceling CellBeginEdit event:

void radGridView1_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
{
    if (radGridView1.Columns[e.ColumnIndex].FieldName == "Status")
    {
        e.Cancel = true;
        this.radGridView1.EndEdit();
    }
}

Greetings,
Martin Vasilev
the Telerik team

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