1、方式一：访问.aspx

客户端：

function Del(Id) {    if (confirm("确认要删除？")) {        $.ajax({            type: "Post",            url: "FormSet.aspx/Del",            data: "{'Id':'" + Id + "'}",            contentType: "application/json; charset=utf-8",            dataType: "json",            success: function (data) {                ShowTip("删除成功！刷新后显示", "success");            },            error: function (err) {                ShowTip("不能删除！此字段已经投入使用", "error");                return false;            }        });    }}

服务器端：

[WebMethod]        public static string GetFormSet(string str)        {            StringBuilder sb = new StringBuilder();            List
     
       list = new BLL.w_FromSet().GetList("where FromSet_FlowType_Id=" + str + "");            foreach (Model.w_FromSet model in list)            {                sb.Append("
      " + model.FromSet_Name + "");            }            if (str == "0")            {                sb.Insert(0, "
      ==请选择==");            }            return sb.ToString();        }