ASP.NET中用AJAX实现无刷新求和~!!~~~~~~~

kiss0622 2008-11-05 09:29:12

第一次用AJAX,在网上找了个例子.调试不出来,各位帮帮忙~~~

Default.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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>无标题页</title>
<script type="text/javascript" language="javascript">

var xmlHttp;
function createXMLHttpRequst() {
try {
xmlHttp = new XMLHttpRequest();
} catch (trymicrosoft) {
try {
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (othermicrosoft) {
try {
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (failed) {
xmlHttp = false;
}
}
function addNumber()
{
createXMLHttpRequst();
var url = "Handler.ashx?num1="+document.getElementById("num1").value+"&num2="+document.getElementById("num2").value;
xmlHttp.open("GET",url,true);
xmlHttp.onreadystatechange=showResult;
xmlHttp.send(null);
}
function showResult()
{

if(xmlHttp.readyState==4)
{
if(xmlHttp.status==200)
{
document.getElementById("result").value=xmlHttp.responseText;
}
}
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<input id="num1" type="text" style="width:98px" onkeyup="addNumber();" value="0"/>+<input id="num2" type="text" style="width:98px" onkeyup="addNumber();" value="0"/>=
<input id="result" style="width:98px" type="text" />
</div>
</form>
</body>
</html>

Handler.ashx

<%@ WebHandler Language="C#" Class="Handler" %>

using System;
using System.Web;
using System.Data;
using System.Data.SqlClient;

public class Handler : IHttpHandler {

public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
int result = Convert.ToInt32(context.Request.QueryString["num1"]) + Convert.ToInt32(context.Request.QueryString["num2"]);
context.Response.Write(result);
}

public bool IsReusable {
get {
return false;
}
}

}

麻烦各位帮忙看看问题在哪??谢谢先>>>

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kiss0622 2008-11-05

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呵呵，多谢谢symbol441 用你的OK拉..散分~!~

symbol441 2008-11-05

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楼主建立连接时错误，试试修改



 function createXMLHttpRequst()

        {

        xmlHttp = false;

            try 

            {

                xmlHttp = new XMLHttpRequest();

            } 

            catch (trymicrosoft) 

            {

                try 

                {

                    xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");

                } 

                catch (othermicrosoft) 

                {

                    try 

                    {

                        xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");

                    } 

                    catch (failed) 

                    {

                        xmlHttp = false;

                    }  

                }

            }

            if (!xmlHttp)

            {

                alert("初始化XMLHttpRequest失败!");

            }

        }