• load()--直接将AJAX请求结果作为jQuery对象内容
  • $.get()--用get方式请求
  • $.post()--用post方式提交
  • ajaxStart()/ajaxComplete()/ajaxError()……--全局的ajax事件响应


DEMO：
建一个GenericHandler作AJAX请求服务端:CubeHandler.ashx

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

using System;
using System.Web;

public class CubeHandler : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/plain";
        int number = 0;
        int.TryParse(context.Request.Params["number"], out number);
        context.Response.StatusCode = 200;
        context.Response.Cache.SetCacheability(HttpCacheability.NoCache);
        context.Response.Write(string.Format("{0} cubed is {1}",number,Math.Pow(number, 3)));
    }
 
    public bool IsReusable {
        get {
            return true;
        }
    }
}

因为用的是Request.Params,所以这个handler能同时支持get和post，

<!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>
    <title>ajax</title>
    <script src="../scripts/jquery-1.2.3.intellisense.js" type="text/javascript"></script>
    <script type="text/javascript">
        $(function(){
            //设置指示器
            $('#divIndicator').ajaxStart(function(){$(this).show()})
                            .ajaxSuccess(function(){$(this).hide()})
                            .ajaxError(function(msg){$(this).hide();alert(msg);});
            //ajax get 请求
            $('#btnGetCubeInGet').click(function(){
                var number = $('#txtNumber').val();
                $.get('CubeHandler.ashx?number='+number,function(result){
                    alert(result);
                });
            });
            
            //ajax post 提交
            $('#btnGetCubeInPost').click(function(){
                var number = $('#txtNumber').val();
                $.get('CubeHandler.ashx',{'number':number},function(result){
                    alert(result);
                });
            });
        });
    </script>
    <style type="text/css">
        .indicator
        {
            color: #FF0000;
            position: absolute;
            top: 0px;
            right: 0px;
            display: none;
        }
    </style>
</head>
<body>
    <div id="divIndicator" class="indicator">
        <img src="indicator.gif" />loading</div>
    plz input a number:<input id="txtNumber" />
    <input type="button" id="btnGetCubeInGet" value="Get cube(get)" />
    <input type="button" id="btnGetCubeInPost" value="Get cube(post)" />
</body>
</html>


点击按钮后的效果：