private void LoadGiaoVien(int IDDonVi)
 {
     pGiaoVienInfo.IDNS_DonVi = IDDonVi;
     dtGiaoVien = oBGiaoVien.NangBacChuyenNgach_GetByIDNS_DonVi(IDDonVi);
     dtGiaoVien.Columns.Add("Chon", typeof(bool));
     if (dtGiaoVien.Rows.Count > 0)
     {
         for (int i = 0; i < dtGiaoVien.Rows.Count; i++)
         {
             dtGiaoVien.Rows[i]["Chon"] = 0;
         }
     }
     dtGiaoVien.AcceptChanges();
     grdGiaoVien.DataSource = dtGiaoVien;
     grvGiaoVien_FocusedRowChanged(null, null);
 }