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3.前台Demo页面.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DEMO.aspx.cs" Inherits="DEMO" %>
<!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 id="Head1" runat="server">
<title>无标题页</title>
<script type="text/javascript" language="javascript">
var xmlHttp;
function $(a){
return document.getElementById?document.getElementById(a):null;
}
function CreateXmlHttp()
{
try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); }
catch (e) { try { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); }
catch (e) { try { xmlHttp = new XMLHttpRequest(); }
catch (e) { xmlHttp = false; }}}
}
function AjaxProcess(url,id)
{
CreateXmlHttp();
xmlHttp.open("POST",url);
xmlHttp.onreadystatechange=function()
{
if(xmlHttp.readyState==4)
{
$(id).innerHTML=xmlHttp.responseText;
}
}
xmlHttp.send(null);
}
function ChangeProvince()
{
// + $("ddProvince").value
var id=$("divCity");
var url="AjaxProcess.aspx?action=City&iParent=3232|vfdvdf" + "&itype=Test_111";
AjaxProcess(url,"divCity");
}
</script>
</head>
<body>
<form id="form1" runat="server">
省份:<asp:DropDownList ID="ddProvince" runat="server" onchange="ChangeProvince();"></asp:DropDownList><br /><br />
<span id="divCity"></span>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:TP_ZDConnectionString %>"
SelectCommand="SELECT AutoCode, sName FROM S_Province"></asp:SqlDataSource>
</form>
</body>
</html>
后台.cs页面:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Collections.Generic;
using System.Drawing;
using System.Reflection;
public partial class DEMO : System.Web.UI.Page
{
protected DataRow EnterDR;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ProCity();
}
}
public void ProCity()
{
ddProvince.DataSource = SqlDataSource1;
ddProvince.DataTextField = "sName";
ddProvince.DataValueField = "AutoCode";
ddProvince.DataBind();
ListItem item = new ListItem("---请选择---", "");
ddProvince.Items.Insert(0, item);
}
}
上面写的不清楚,也许会纯在些遗漏,下面提供一个demo下载有需要的可以下载来看,里面还有个省份-市区数据库:
http://download.csdn.net/user/sunchaohuang