If e.Row.RowType = DataControlRowType.DataRow AndAlso dgrd_WWWH_How.EditIndex = e.Row.RowIndex Then
Dim ddlresp As DropDownList = CType(e.Row.FindControl("ddlResp"), DropDownList)
Dim txtresp = CType(e.Row.FindControl("txtResp"), Label)
binddropdownlist()
ddlresp.Items.FindByText(txtresp.Text).Selected = True
End If
Try this code in Gridview RowDatabound Event