<%@ 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 }
