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

 1 using Microsoft.AspNet.SignalR;
 2 using System;
 3 using System.Collections.Generic;
 4 using System.Linq;
 5 using System.Web;
 6 
 7 namespace CarportManage.Models
 8 {
 9     public class seedmessage:Hub
10     {
11         public void Send(object message)
12         {
13             IHubContext chat = GlobalHost.ConnectionManager.GetHubContext<seedmessage>();
14             chat.Clients.All.add(message);
15 
16         }
17     }
18 }

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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 = 1;

            }
            catch (Exception)
            {
                success = 0;

            }
            //new { success = true }
            return Content(success.ToString());
        }

    }
}

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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>

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