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在ASP.NET MVC中json的应用(即JsonResult)（asp.net mvc 后台返回json数据方式 ）



1，博文简介


 本博文提供了两种解决方案。

a）ajax+Handler

b) ajax+ JsonResult


2，a)例子代码

1, /Views/Home/Index.aspx　　提交页面

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>

<!DOCTYPE html>

<html>
<head runat="server">
    <title>index</title>
    <script src="http://www.cnblogs.com/Scripts/jquery-1.4.4.js" type="text/javascript"></script>
    <script type="text/javascript">
        var login = function () {
            var data = { "username": $.trim($("#username").val()), "pwd": $.trim($("#pwd").val()) }

            //            $.post("/Handlers/Login.ashx", data, function (message) {
            //                if (message.success) {
            //                    alert(message.msg);
            //                }
            //                else {
            //                    alert(message.msg);
            //                }
            //            }, "json");

            $.ajax({ type: "post",url:"/Handlers/Login.ashx", data: data, success: function (message) {
                if (message.success) {
                    alert(message.msg);
                }
                else {
                    alert(message.msg);
                }
            },dataType:"json"
            });
        }
    </script>
</head>
<body>
<div id="nav">
<a>ajax+Handler</a> <a href="/Home/Index2" target="_blank" rel="external nofollow" >ajax+action</a>
</div>
    <div>
        <h3>Login</h3>
        Username:<input id="username" name="username" type="text" /><br />
        Userpass:<input id="pwd" name="pwd" type="password" /><br />
        <button type="button" οnclick="login()" >Submit</button>
    </div>
</body>
</html>


2, /Handlers/Login.ashx　　(处理程序)

using System.Web;

using System.Web.Script.Serialization;  //引用，序列化程序集
namespace Mvc1.Handlers
{
    /// <summary>
    /// Login 的摘要说明
    /// </summary>
    public class Login : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";

            string username = context.Request["username"];
            string pwd = context.Request["pwd"];

            message msg = null;
            if (username == "rain" && pwd == "m123")
            {
                msg = new message(true, "S");
            }
            else
            {
                msg = new message(false, "F");
            }
            //创建序列化对象
            JavaScriptSerializer jss = new JavaScriptSerializer();

            context.Response.Write(jss.Serialize(msg)); //返回json格式对象
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
        /// <summary>
        /// 提示信息
        /// </summary>
        class message
        {
            public bool success;
            public string msg;

            public message(bool success, string msg)
            {
                this.success = success;
                this.msg = msg;
            }

            public bool Success
            {
                get { return success; }
                set { success = value; }
            }
            public string Msg
            {
                get { return msg; }
                set { msg = value; }
            }
        }
    }
}


3，b)例子代码

1, /Views/Home/Index2.aspx

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>

<!DOCTYPE html>
<html>
<head runat="server">
    <title>Index2</title>
    <script src="http://www.cnblogs.com/Scripts/jquery-1.4.4.js" type="text/javascript"></script>
    <script type="text/javascript">
        var login = function () {
            var data = { "username": $.trim($("#username").val()), "pwd": $.trim($("#pwd").val()) }

//            $.post("/Home/Login", data, function (message) {
//                if (message.success) {
//                    alert(message.msg);
//                }
//                else {
//                    alert(message.msg);
//                }
//            }, "json");

            $.ajax({ type: "post", url: "/Home/Login", data: data, success: function (message) {
                if (message.success) {
                    alert(message.msg);
                }
                else {
                    alert(message.msg);
                }
            }, dataType: "json"
            });
        }
    </script>
</head>
<body>
    <div id="nav">
        <a href="/Home/Index" target="_blank" rel="external nofollow" >ajax+Handler</a>  <a>ajax+action</a>
    </div>
    <div>
        <h3>
            Login</h3>
        Username:<input id="username" name="username" type="text" /><br />
        Userpass:<input id="pwd" name="pwd" type="password" /><br />
        <button type="button" οnclick="login()">
            Submit</button>
    </div>
</body>
</html>

2, /Controllers/HomeController.cs


using System.Web.Mvc;

namespace Mvc1.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/

        public ActionResult Index()
        {
            return View();
        }
        //
        // GET: /Home/Index2
        public ActionResult Index2()
        {
            return View();
        }

        // Post: /Home/Login
        [HttpPost]
        public JsonResult Login()
        {
            string username=Request["username"];
            string pwd = Request["pwd"];

            message msg = null;

            if (username == "rain" && pwd == "m123")
            {
                msg = new message(true, "Success");
            }
            else
            {
                msg = new message(false, "Fail");
            }

            return Json(msg);
        }
    }

    class message
    {
        public bool success;
        public string msg;

        public message(bool success, string msg)
        {
            this.success = success;
            this.msg = msg;
        }

        public bool Success
        {
            get { return success; }
            set { success = value; }
        }
        public string Msg
        {
            get { return msg; }
            set { msg = value; }
        }
    }
}

原文链接:http://www.cnblogs.com/ylbtech/archive/2012/10/11/2719545.html

warn作者：ylbtech
出处：http://ylbtech.cnblogs.com/
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。