using Owin;
using Microsoft.Owin;
[assembly: OwinStartup(typeof(SignalRChat.Startup))]
namespace SignalRChat
{
 public class Startup
 {
  public void Configuration(IAppBuilder app)
  {
   // Any connection or hub wire up and configuration should go here
   app.MapSignalR();
  }
 }
}

using System;
using System.Web;
using Microsoft.AspNet.SignalR;
namespace SignalRChat
{
 public class ChatHub : Hub
 {
  public void Send(string name, string message)
  {
   // Call the addNewMessageToPage method to update clients.
   Clients.All.addNewMessageToPage(name, message);
  }
 }
}

public ActionResult Chat()

{

 return View();

}

@{
 ViewBag.Title = "Chat";
}
<h2>Chat</h2>
<div class="container">
 <input type="text" id="message" />
 <input type="button" id="sendmessage" value="Send" />
 <input type="hidden" id="displayname" />
 <ul id="discussion"></ul>
</div>
@section scripts {
 <!--Script references. -->
 <!--The jQuery library is required and is referenced by default in _Layout.cshtml. -->
 <!--Reference the SignalR library. -->
 <script src="~/Scripts/jquery.signalR-2.0.3.min.js"></script>
 <!--Reference the autogenerated SignalR hub script. -->
 <script src="~/signalr/hubs"></script>
 <!--SignalR script to update the chat page and send messages.-->
 <script>
  $(function () {
   // 建立对应server端Hub class的对象，请注意ChatHub(Hubs文件夹下的类名)的第一个字母要改成小写 
   var chat = $.connection.chatHub;
   // 定义client端的javascript function，供server端hub，通过dynamic的方式，调用所有Clients的javascript function 
   chat.client.addNewMessageToPage = function (name, message) { //这里的fuction(name,message)=>ChatHub.cs 中的Send(string name, string message)
    //当server端调用sendMessage时，将server push的message数据，呈现在wholeMessage中 
    $('#discussion').append('<li><strong>' + htmlEncode(name)
     + '</strong>: ' + htmlEncode(message) + '</li>');
   };
   // Get the user name and store it to prepend to messages.
   $('#displayname').val(prompt('Enter your name:', ''));
   // Set initial focus to message input box.
   $('#message').focus();
   //把connection打开 
   $.connection.hub.start().done(function () {
    $('#sendmessage').click(function () {
     //调用叫server端的Hub对象，将#message数据传给server 
     chat.server.send($('#displayname').val(), $('#message').val());
     $('#message').val('').focus();
    });
   });
  });
  // This optional function html-encodes messages for display in the page.
  function htmlEncode(value) {
   var encodedValue = $('<div />').text(value).html();
   return encodedValue;
  }
 </script>
}