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XMLHttpRequest无刷新更新页面(XML文档格式)

技术2022-05-11  0


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<%@ 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 }


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