Jquery异步请求数据实例

一、Jquery向aspx页面请求数据

前台页面JS代码：

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

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

后台cs代码：

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

$("#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:

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：

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

后台代码:

<%@ 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;
        }
    }

}