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C# XMLHttpRequest对象—Ajax实例

2014-10-25 05:24 555 查看

Get:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript">
window.onload = function () {
document.getElementById("btnGet").onclick = function () {
//第一步，创建XMLHttpRequest对象
var xhr = null;
if (typeof (XMLHttpRequest) != undefined) {
xhr = new XMLHttpRequest();
}
else {
xhr = new ActiveXObject("Microsoft.XMLHttp");
}
//第二部，设置异步回调函数。
xhr.onreadystatechange = function () {
//xhr对象状态，0=已创建XMLHttpRequest对象,1=open,2=send,3=onready等待响应,4=成功。
if (xhr.readyState == 4) {
//status 响应状态
if (xhr.status >= 200 && xhr.status < 300 || xhr.status == 304) {
document.getElementById("div1").innerHTML = xhr.responseText; //xhr.responseText 响应体
}
}
}
//第三步，打开对象，设置请求方式和访问路径
xhr.open("Get", "GetTime.ashx?id=17&name=" + window.encodeURIComponent("张三"), true);
//第四步，send()
xhr.send(null);
};
};
</script>
</head>
<body>
<div id="div1"></div>
<input type="button" value="无刷新异步获取" id="btnGet" />
</body>
</html>

Post:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script type="text/javascript">
window.onload = function () {
document.getElementById("btn").onclick = function () {
var xhr = null;
if (typeof (XMLHttpRequest) != undefined) {
xhr = new XMLHttpRequest();
}
else {
xhr = new ActiveXObject("Microsoft.XMLHttp");
}
xhr.onreadystatechange = function () {
if (xhr.readyState == 4 && xhr.status == 200) {
document.getElementById("div1").innerHTML = xhr.responseText + "<hr />";
//获取响应报文头信息
var date = xhr.getResponseHeader("Date");
document.getElementById("div2").innerHTML = date + "<hr />";
//获取所有响应报文头信息
var all = xhr.getAllResponseHeaders();
document.getElementById("div3").innerHTML = all + "<hr />";
}
}
//通过Post方式请求
xhr.open("Post", "GetTime.ashx", true);
//需要添加请求报文头，Content-Type.
xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
//通过键值对的方式传值。
var name = document.getElementById("name").value;
xhr.send("id=18&name=" + name);
};
};
</script>
</head>
<body>
<div id="div1"></div>
<div id="div2"></div>
<div id="div3"></div>
<input type="text" id="name" value="李四" />
<input type="button" value="提交" id="btn" />
</body>
</html>

GetTime.ashx:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Web;

namespace MyPerson.UI.Ajax
{
/// <summary>
/// GetTime 的摘要说明
/// </summary>
public class GetTime : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//Thread.Sleep(1000);
string id = context.Request["id"];
string name = context.Request["name"];
context.Response.Write(DateTime.Now.ToString() + "<br/>编号：" + id + "<br/>姓名：" + name);
}

public bool IsReusable
{
get
{
return false;
}
}
}
}

JQuery版：

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script src="../Scripts/jquery-1.7.1.js"></script>
<script type="text/javascript">
$(function () {
$("#btnGet").click(function () {
$.ajax({
type: "GET",
url: "GetTime.ashx",
data: {id: 17, name: "张三"},
dataType: "text",
success: function(data) {
$('#div1').html(data);
}
});
});
});
</script>
</head>
<body>
<div id="div1"></div>
<input type="button" value="无刷新异步获取" id="btnGet" />
</body>
</html>

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