<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default17.aspx.cs" Inherits="Default17" %>
<!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>Untitled Page</title>
<script type="text/javascript">
var xmlHttp;
function createXMLHttpRequest()
{
if (window.ActiveXObject)
{
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
}
else if (window.XMLHttpRequest)
{
xmlHttp = new XMLHttpRequest();
}
}
function startRequest()
{
var ProvinceID=document.all("RadioButtonList1");
var pv;
for(i=0;i<ProvinceID.length;i++)
{
if(ProvinceID[i].checked)
{
pv=ProvinceID[i].value;
}
}
createXMLHttpRequest();
xmlHttp.onreadystatechange = handleStateChange;
xmlHttp.open("POST", "Default17.aspx?ProvinceID=" +pv, true);
xmlHttp.send(null);
}
function handleStateChange()
{
if(xmlHttp.readyState == 4)
{
if(xmlHttp.status == 200) //200(OK);404(not found)
{
var blist=document.getElementById("DropDownList1");
blist.length=0;
alert(xmlHttp.getResponseHeader("Content-Type"));
var rs = xmlHttp.responseXML;
var ss=rs.getElementsByTagName("Row");
for(var i=0;i<ss.length;i++)
{
var option = document.createElement("OPTION");
option.text = ss[i].getElementsByTagName("GRDTX")[0].childNodes[0].nodeValue;
option.value = ss[i].getElementsByTagName("GRUND")[0].childNodes[0].nodeValue;
blist.options.add(option);
}
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:DropDownList ID="DropDownList1" runat="server"></asp:DropDownList>
<asp:RadioButtonList ID="RadioButtonList1" runat="server">
<asp:ListItem>A</asp:ListItem>
<asp:ListItem>B</asp:ListItem>
<asp:ListItem>C</asp:ListItem>
</asp:RadioButtonList>
</form>
</body>
</html>
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;
public partial class Default17 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
this.RadioButtonList1.Attributes.Add("onclick", "return startRequest();");
if(ProvinceID!="")
｛ //You can call service function here.Then if the xmlHttpRequest send request.the function will be used.
GetCityByProvinceID(ProvinceID);
｝
}
}
//property
#region property
private string ProvinceID
{
get
{
if (Request["ProvinceID"] != null && Request["ProvinceID"].ToString() != "")
{
return Request["ProvinceID"];
}
else
{
return "";
}
}
}
#endregion
//GetCityByProvinceID
#region GetCityByProvinceID
private void GetCityByProvinceID(string ProvinceID)
{
string xml = "<Data>";
xml += "<Row>";
xml += "<GRDTX>" + ProvinceID + "</GRDTX>";
xml += "<GRUND>" + ProvinceID + "</GRUND>";
xml += "</Row>";
xml += "</Data>";
Response.ContentType = "text/xml";
Response.Write(xml);
Response.End();
}
#endregion
}