同事的代码，帮忙修改的，为了实现页面跳转回来后，状态的保持，Service 使用了Session。  主要的JS    $.ajax({            url: "/ws/StaffInfo.asmx/Note",//路径/方法            type: "POST",            contentType: "application/json",            data: "{id:'" + id + "',sex:'" + sex + "',dep:'" + dep + "',sql:'" + sql + "',page:'" + page + "'}",            dataType: "json",            success: function (res) {                //var th = res.d;                //alert(th);                window.open("AddStaffInfo.aspx?id=" + getid + "", "_self");            },            error: function (XMLHttpRequest, textStatus, errorInfo) {                alert("请求失败");            }            //error: function (data) {            //    alert("请求失败");            //}        });           //此处使用 Session，必须加的特性       [WebMethod(EnableSession = true)]        public string Note(string id, string sex, string dep, string sql,string page)       {                Session["WebServiceStaffIsopen"] = true;                Session["WebServiceStaffId"] = id;                Session["WebServiceStaffSex"] = sex;                Session["WebServiceStaffDep"] = dep;                              Session["WebServiceStaffPage"] = page;                         string s = Microsoft.JScript.GlobalObject.unescape(sql);                Web.StaffInfo.Id = id;                Web.StaffInfo.Sex = sex;                Web.StaffInfo.Dep = dep;                Web.StaffInfo.Sql = s;                Web.StaffInfo.Index = page;                Web.StaffInfo.Isopen = true;                if (s.Trim().ToLower() == "true")                {                    Web.StaffInfo.Sql = "1=1";                    Session["WebServiceStaffSql"] = "1=1";                }                else                {                    Web.StaffInfo.Sql = s;                    Session["WebServiceStaffSql"] = s;                }                return s + id + sex + dep + page;        }