dropdownlit  ${ InitData; function InitData { $.ajax({ type:"POST", dataType:"json", url: "Handler.ashx", data:{"n":n}, success:function{ $.each{ var pro=$; $.appendTo; } function GetCity { var city=$; city.html; $.ajax({ type:"POST", dataType:"json", url: "Handler.ashx", data:{"n":n}, success:function{ $.each{ $(""+ n.A_Num1 +">"+ n.A_Name +"").appendTo; }    

前台dropdownlist.html

using System;using System.Web;using System.Data;public class Handler : IHttpHandler{ Common coObj = new Common(); public void ProcessRequest { if (context.Request.Params["n"] != null) { string num = context.Request.Params["n"].ToString(); context.Response.ContentType = "text/plain"; string str = "select * from address where a_num2=" + num; DataTable dt = coObj.GetTable; string json = JSONHelper.DataTableToJSON; context.Response.Write; } } public bool IsReusable { get { return false; } }}

本文实例讲述了jQuery+JSON实现AJAX二级联动的方法。分享给大家供大家参考,具体如下:

希望本文所述对大家jQuery程序设计有所帮助。

后台Handler.ashx

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