這是採用ajax技術,重新整理是肯定的,是在我們察覺不到的速度完成.XMLHTTP犧牲頁面的方法,我們之所以看不見重新整理,是因為所有的工作都是在犧牲頁面上進行的,裡面"翻江倒海"的"折騰",我們看不見,效率上差些!
AjaxPro.dll 下載地址 http://ajaxpro.schwarz-interactive.de/download/ajaxpro.zip
Web.Config
<?xml version="1.0"?>
<configuration>
<system.web>
<httpHandlers>
<add verb="POST,GET" path="ajax/*.ashx" type="Ajax.PageHandlerFactory, Ajax" />
<add verb="POST,GET" path="ajaxpro/*.ashx" type="AjaxPro.AjaxHandlerFactory,AjaxPro.2"/>
</httpHandlers>
</system.web>
</configuration>
AjaxTest.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AjaxTest.aspx.cs" Inherits="AjaxTest" %>
<!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 runat="server">
<title>無標題頁</title>
</head>
<body>
<script language="javascript" type="text/javascript">
function areaResult()
{
var area=document.getElementById("DropDownList1");
//alert(area.value);
AjaxTest.GetCityList(area.value,get_city_Result_CallBack);
}
function get_city_Result_CallBack(response)
{
if (response.value != null)
{
document.all("DropDownList2").length=0;
var ds = response.value;
if(ds != null && typeof(ds) == "object" && ds.Tables != null)
{
for(var i=0; i<ds.Tables[0].Rows.length; i++)
{
var name=ds.Tables[0].Rows[i].name;
var id=ds.Tables[0].Rows[i].id;
document.all("DropDownList2").options.add(new Option(name,id));
}
//document.all("TextBox1").value="";
}
}
return
}
</script>
<form id="form1" runat="server">
<asp:DropDownList ID="DropDownList1" runat="server">
</asp:DropDownList>
<asp:DropDownList ID="DropDownList2" runat="server">
</asp:DropDownList>
<br />
</form>
</body>
</html>