本篇文章主要是對Ajax級聯菜單的實例代碼進行了介紹，需要的朋友可以過來參考下，希望對大家有所幫助
1.Ajax.html 代碼如下: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>Ajax</title> <script type="text/javascript"> function loadXMLDoc(txt) { var xmlhttp; if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp = new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange = function () { if (xmlhttp.readyState == 4 && xmlhttp.status == 200) { var citys = xmlhttp.responseText.split(','); document.getElementById("citys").length = 1; for (i = 0; i < citys.length - 1; i++) { document.getElementById("citys").add(new Option(citys[i], citys[i])); } // document.getElementById("myDiv").innerHTML = xmlhttp.responseText; } } xmlhttp.open("GET","ajax/getdata.aspx?pro="+txt, true); xmlhttp.send(); } </script> </head> <body> <h2>AJAX</h2> <select id="Select1" onchange="loadXMLDoc(this.value)"> <option>請選擇省份</option> <option value="1">江蘇</option> <option value="2">上海</option> </select> <select id="citys"> <option>請選擇城市</option> </select> <div id="myDiv"></div> </body> </html> 2.getdata.aspx.cs 代碼如下: using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class ajax_getdata : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { string[] js=new string[]{"南京", "蘇州", "常州" , "無錫" , "鎮江"}; string pro=Request.QueryString["pro"]; if (pro == "1") { string temp = ""; for (int i = 0; i < js.Length; i++) { temp = temp + js[i]; temp = temp + ","; } Response.Write(temp); } else Response.Write(""); } }
