Hi Pawan,
This can be achieved by handling the TableControlCurrentCellCloseDropDown event. In the event, you can retrieve the selected dropdown value by using the renderer of the corresponding cell type. The following is the code snippet
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// TableControlCurrentCellCloseDropDown
GridCurrentCell cc = this.gridGroupingControl1.TableControl.CurrentCell;
GridComboBoxCellRenderer cr = cc.Renderer as GridComboBoxCellRenderer;
Console.WriteLine(cr.ListBoxPart.SelectedValue);
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Sample:
GGC_DropDown3.zipKindly let us know if you need any further assistance.
Have a nice day.
Best regards,
Madhan