DockingManager NullReferenceException

[Srinivasa]

Hi,

On the launch of the splitter window if the user tries to resize  the sub window by dragging/moving the splitter, A NullReferenceException is thrown.  The following is the stack message.
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   System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.Docking.DockSite.CalcSplitterMargin(Splitter& splitter)
   at Telerik.WinControls.Docking.DockSite.OnMouseDown(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseDown(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at System.Windows.Forms.ContainerControl.WndProc(Message& m)
   at Telerik.WinControls.Docking.DockSite.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.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
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Note: sub windows are the DockPanels which are added to the DockingManager using SetDock.

Thanks for any help,
Srinivas.

[Julian Benkov]

Hi Srinivasa,

The DockingManager control is now obsolete and it is not actively developed and supported. It is replaced with the RadDock control. It has a better API, can dock directly controls and Forms objects, there are many improvements in the save/load layout functionality and it supports our new theming mechanism. More information regarding the RadDock control you can found in our online documentation.

I hope this helps. Should you have further questions, do not hesitate to ask.

All the best,
Julian Benkov
the Telerik team