Dropdown find control in gridview

foreach (GridViewRow row in grdDisplay.Rows)
        {
            DropDownList drdList =  (DropDownList)                                                                                    (grdDisplay.Rows[row.RowIndex].Cells[0].FindControl("ddlfindledgername"));
            drdList.Items.Clear();
            drdList.DataTextField = "LedgerName";
            drdList.DataValueField = "LedgerCode";
            drdList.DataSource = dt2;
            drdList.DataBind();
        }