Insert lookupedit value to xtragrid and in xtragrid double click on a cell and that value should display in lookupedit

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C#

DevExpress

I created one XtraGrid and added some values with the help of LookUpEdit and some TextBoxes. I want to modify the values what I have added into grid here. I am using getfocusedrowcellvalue to get values from grid into TextBoxes. How can I get that getfocusedrowcellvalue to LookUpEdit?

example:- txtdrmk.Text = Convert.ToString(gridView3.GetFocusedRowCellValue("remark"));//to get value from selected cell to text box.

cmbper // this is my lookupedit.

What I have tried:

I tried by giving like this

cmbper.text=Convert.ToString(gridView3.GetFocusedRowCellValue("person"));

it is showing that name in lookup edit but when I tried to select different name that dropdown first time showing empty and second time only it is showing names.