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 public string GetName()
        {
            string str = "";
            SPSecurity.RunWithElevatedPrivileges(delegate()
            {
                SPSite site = new SPSite("http://win2012moss:6003");
                SPWeb web = site.OpenWeb();
                SPList list = web.Lists["用户通讯录"];
                SPQuery query = new SPQuery();
                SPListItemCollection sic = list.GetItems(query);
                System.Data.DataTable dt = sic.GetDataTable();
                if (dt.Rows.Count > 0)
                {
                    str = dt.Rows[0]["UserName"].ToString();
                }
                else
                {
                    str = "wushuju";
                }
            });
            return str;
        }