int recordCount;

            var memberInfos = member.Paging(20, 1, "MemberId DESC", "", out recordCount);

            var memberIdSum = memberInfos.Sum(c => c.MemberId);

            Response.Write(memberIdSum.ToString());

            Response.Write("<br/>——————————————————-<br />");

 

            var dbHelper = DbFactory.AccessSqlServer;

            var dbPaging = DBPaging.Create(dbHelper);

            var ds = dbPaging.GetListByPage(20, 1, "Member", "", "MemberId DESC");

            var memberIdSum2 = from order in ds.Tables[0].AsEnumerable()

                               group order by order.Table into g

                               select new

                               {

                                   TotalDue = g.Sum(c => c.Field<Int32>("MemberId")),

                               };

            foreach (var row in memberIdSum2)

            {

                Response.Write(row.TotalDue+"<br />");

            }