private void delete_dm_giang_vien(int ip_i_row_del)
 {
     try
     {
         decimal v_dc_id_ma_giang_vien = CIPConvert.ToDecimal(m_grv_dm_danh_sach_giang_vien.DataKeys[ip_i_row_del].Value);
         m_us_dm_giang_vien.dcID = v_dc_id_ma_giang_vien;
         m_us_dm_giang_vien.DeleteByID(v_dc_id_ma_giang_vien);
         m_lbl_thong_bao.Text = "Xóa bản ghi thành công";
         get_form_search_data_and_load_to_grid();
     }
     catch (Exception v_e)
     {
         throw v_e;
     }
 }