网络编程 发布日期：2025/11/15 浏览次数：1
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：
后台Handler.ashx
<%@ WebHandler Language="C#" Class="Handler" %>
using System;
using System.Web;
using System.Data;
public class Handler : IHttpHandler
{
Common coObj = new Common();
public void ProcessRequest(HttpContext context)
{
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(str);
string json = JSONHelper.DataTableToJSON(dt);
context.Response.Write(json);
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
前台dropdownlist.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <title>dropdownlit </title> <meta name="Generator" content="EditPlus" /> <script type="text/javascript" src="/UploadFiles/2021-04-02/jquery-1.5.2.js">希望本文所述对大家jQuery程序设计有所帮助。