asp.net mvc4 signalR后台自推送

1.在引用中添加signalr后首选要引入Startup.cs类，在VS2012中添加Signalr后没有Startup.cs类然后就会报错代码如下

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using Owin;

using Microsoft.Owin;

[assembly: OwinStartup(typeof(CarportManage.Startup))]

namespace CarportManage

{

    public class Startup

    {

        public void Configuration(IAppBuilder app)

        {

            // Any connection or hub wire up and configuration should go here

            app.MapSignalR();

        }

    }

}

2写一个发送类

 using Microsoft.AspNet.SignalR;

 using System;

 using System.Collections.Generic;

 using System.Linq;

 using System.Web;

 namespace CarportManage.Models

 {

     public class seedmessage:Hub

     {

         public void Send(object message)

         {

             IHubContext chat = GlobalHost.ConnectionManager.GetHubContext<seedmessage>();

             chat.Clients.All.add(message);

         }

     }

 }

3后台代码调用发送类

using CarportManage.Models;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.Mvc;

namespace CarportManage.Controllers

{

    public class AlertController : Controller

    {

        //

        // GET: /Alert/

        CardManageEntities3 db = new CardManageEntities3();

        public ActionResult Index()

        {

            return View();

        }

        public ActionResult show()

        {

            return View();

        }

        public ActionResult insert(FormCollection from)

        {

            int success;

            try

            {

                CardManage t = new CardManage();

                t.userName = from["add_name"];

                t.userTel = from["add_tel"];

                t.carNum = from["add_carNum"];

                t.userDep = from["add_dep"];

                t.fixedCarport = from["add_fixedCarport"];

                db.CardManage.Add(t);

                db.SaveChanges();

                seedmessage s = new seedmessage();

                s.Send(t);

                success = ;

            }

            catch (Exception)

            {

                success = ;

            }

            //new { success = true }

            return Content(success.ToString());

        }

    }

}

4前端代码块

    Layout = null;

}

<!DOCTYPE html>

<html>

<head>

    <meta name="viewport" content="width=device-width" />

    <script src="~/Scripts/jquery-1.7.1.js"></script>

    <script src="~/Scripts/jquery.signalR-2.1.2.js"></script>

    <script src="~/Scripts/jquery.signalR-2.1.2.min.js"></script>

       <script src="~/signalr/hubs"></script>

     <script type="text/javascript">

         var pushHub = $.connection.seedmessage;

        pushHub.client.add= function (message) {

            alert(message.userName);

            alert(message.userTel);

        }

        $.connection.hub.start();

    </script>

    <title>接收端</title>

</head>

<body>

    <div>

    </div>

</body>

</html>