public void delete(IList <QueryModel> qmList) { SqlConnection cn = null; SqlTransaction tc = null; try { cn = DbHelperSQL.getConnection(); tc = DbHelperSQL.startTransaction(cn); usersDal.del(cn, tc, qmList); DbHelperSQL.commitTransaction(tc); } catch (Exception dalEx) { DbHelperSQL.rollBackTransaction(tc); throw new MakeException(ExpSort.数据库, dalEx.Message); } finally { DbHelperSQL.closeConnection(cn); } }