private void delete_excel_import_hoc_vien()
 {
     if(!CGridUtils.IsThere_Any_NonFixed_Row(m_fg)) return;
     if(!CGridUtils.isValid_NonFixed_RowIndex(m_fg, m_fg.Row)) return;
     if(BaseMessages.askUser_DataCouldBeDeleted(8) != BaseMessages.IsDataCouldBeDeleted.CouldBeDeleted) return;
     US_EXCEL_IMPORT_HOC_VIEN v_us = new US_EXCEL_IMPORT_HOC_VIEN();
     grid2us_object(v_us, m_fg.Row);
     try {
         v_us.BeginTransaction();
         v_us.Delete();
         v_us.CommitTransaction();
         m_fg.Rows.Remove(m_fg.Row);
     }
     catch(Exception v_e) {
         v_us.Rollback();
         CDBExceptionHandler v_objErrHandler = new CDBExceptionHandler(v_e,
             new CDBClientDBExceptionInterpret());
         v_objErrHandler.showErrorMessage();
     }
 }