PEAEWebSiteDataContext context = new PEAEWebSiteDataContext();
            var p = from n in context.tb_News
                    where n.cname == "校园信息"
                    select n;
            var pp = p.OrderByDescending(tb_News=>tb_News.issuedate).Take(1);var p1 = from n in context.tb_News
                    where n.cname == "活动安排"
                    select n;
            var pp1 = p1.OrderByDescending(tb_News=>tb_News.issuedate).Take(1);
            DataList1.DataSource = pp;
            DataList2.DataSource = pp1;
            DataList1.DataBind();
            DataList2.DataBind();