Hi Sandeep,
Thank you for your interest in Syncfusion products.
We have analyzed the reported query in our end, We have three events to fire on drop down, Please use these event in your application, the below codes help to you to get the correct event.
this.gridDataBoundGrid1.CurrentCellShowingDropDown += new GridCurrentCellShowingDropDownEventHandler(gridDataBoundGrid1_CurrentCellShowingDropDown);
this.gridDataBoundGrid1.CurrentCellShowedDropDown += new EventHandler(gridDataBoundGrid1_CurrentCellShowedDropDown);
this.gridDataBoundGrid1.CurrentCellCloseDropDown += new PopupClosedEventHandler(gridDataBoundGrid1_CurrentCellCloseDropDown);
Please let me know if you have any concerns.
Regards,
Vinish K