Dynamically adding combobox to Grid

[Administrator]

Hi ,
I am populating the Combobox dynamically in the GridDataBoundGrid.I am able to populate the combobox but when i click on this cell it crashes. Please tell me the way out of this problem and possible reasons why it is coming...I am giving you the information i got while running it...

Messages:
Object reference not set to an instance of an object.

Stack Trace:
at Syncfusion.Windows.Forms.Grid.GridControlBase.OnPaint(PaintEventArgs pe)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at Syncfusion.Windows.Forms.ScrollControl.WndProc(Message& msg)
at Syncfusion.Windows.Forms.Grid.GridControlBase.WndProc(Message& msg)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[Administrator]

Here is a KB link to one way you can dynamically control the contents of one dropdown based on the values set in another using CurretnCellShowingDropDown. http://www.syncfusion.com/Support/article.aspx?id=567 Here is a sample that does it in a slightly different manner using grid.Model,QueryCellInfo. How are you trying to do it? If you cannot use one of the above techniques, can you postt a sample project showing what you are trying to do?