Hi Pawan,
Please try this.
//For showing the DropDownButton in a Cell with DataSource.
this.gridGroupingControl1.TableDescriptor.Columns[2].Appearance.AnyRecordFieldCell.CellType = "GridListControl";
this.gridGroupingControl1.TableDescriptor.Columns[2].Appearance.AnyRecordFieldCell.DataSource = ComboTable;
//For Display the clicked value from the DropDown...
this.gridGroupingControl1.TableDescriptor.Columns[2].Appearance.AnyRecordFieldCell.DisplayMember = "ComboName";
//For getting the value from the DropDown...
this.gridGroupingControl1.TableDescriptor.Columns[2].Appearance.AnyRecordFieldCell.ValueMember = "ComboID";
Here is a sample.
GGCDataSourceColumn.zipBest Regards,
Haneef