Jquery异步请求数据实例代码

一、Jquery向aspx页面请求数据 
前台页面JS代码： 
代码如下:

$("#Button1").bind("click", function () {
    $.ajax({
        type: "post",
        url: "default.aspx",
        data: "name=" + $("#Text1").val(),
        success: function (result) {
            alert(result.msg);
        }
    });
}); 

代码如下:

<input id="Text1" type="text" value='张三'/>
<input id="Button1" type="button" value="提交" /> 

后台cs代码： 
 代码如下:

protected void Page_Load(object sender, EventArgs e)
{
    if (Request["name"] != null)
    {
        Response.ContentType = "text/json";
        Response.Write("{\"msg\":\"" + Request["name"] + "\"}");//将数据拼凑为Json
        Response.End();
    }
}

二、Jquery向WebService页面请求数据 
 代码如下:

$("#Button2").bind("click", function () {
    $.ajax({
        type: "post",
        contentType: "application/json",
        url: "WebService.asmx/HelloWorld",
        data: "{name:'" + $("#Text1").val() + "'}",
        datatype: "json",
        success: function (result) {
            alert(result.d);
        }
    });
});

<input id="Button2" type="button" value="向WebService提交" />

WebService代码 
代码如下:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
/// <summary>
/// Summary description for WebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConFormsTo = WsiProfiles.BasicProfile1_1)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
[System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService
{
    public WebService()
    {
        //Uncomment the following line if using designed components
        //InitializeComponent();
    }
    [WebMethod]
    public string HelloWorld(string name)
    {
        return "Hello World" + name;
    }
} 

三、Jquery向ashx请求数据和向页面相同 
Js代码： 
代码如下:

$("#Button3").bind("click", function () {
    $.ajax({
        type: "post",
        url: "Handler.ashx",
        data: "name=" + $("#Text1").val(),
        success: function (result) {
            alert(result.msg);
        }
    });
}); 

后台代码: 
代码如下:

<%@ WebHandler Language="C#" Class="Handler" %>
using System;
using System.Web;
public class Handler : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/json";
        context.Response.Write("{\"msg\":\"Hello World" + context.Request["name"] + "来自handler.ashx\"}");
        context.Response.End();
    }
    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}