public static DataTable List2Dt( ref List<DB.Stru.老龄办.敬老优待证> lst )
        {
            DB.Orm.老龄办.敬老优待证 orm = new DB.Orm.老龄办.敬老优待证();
            DataTable dt = orm.GetBlank();

            foreach ( DB.Stru.老龄办.敬老优待证 o in lst )
            {
                DataRow dr = dt.Rows.Add();
                o.Stru2Dr( ref dr );
            }

            return dt;
        }