using System;
using Microsoft.AspNet.SignalR;

namespace SignalDemo
{
 public class ServerHub : Hub
 {
 private static readonly char[] Constant =
 {
 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
 'w', 'x', 'y', 'z',
 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
 'W', 'X', 'Y', 'Z'
 };

 /// <summary>
 /// 供客戶端調(diào)用的服務(wù)器端代碼
 /// </summary>
 /// <param name="message"></param>
 public void Send(string message)
 {
 var name = GenerateRandomName(4);

 // 調(diào)用所有客戶端的sendMessage方法
 Clients.All.sendMessage(name, message);
 }

 /// <summary>
 /// 產(chǎn)生隨機(jī)用戶名函數(shù)
 /// </summary>
 /// <param name="length">用戶名長(zhǎng)度</param>
 /// <returns></returns>
 public static string GenerateRandomName(int length)
 {
 var newRandom = new System.Text.StringBuilder(62);
 var rd = new Random();
 for (var i = 0; i < length; i++)
 {
 newRandom.Append(Constant[rd.Next(62)]);
 }
 return newRandom.ToString();
 }
 }
}

using Microsoft.Owin;
using Owin;

[assembly: OwinStartupAttribute(typeof(SignalDemo.Startup))]
namespace SignalDemo
{
 public partial class Startup
 {
 #region MyRegion
 public void Configuration(IAppBuilder app)
 {
 app.MapSignalR();
 ConfigureAuth(app);
 } 
 #endregion
 }
}

using System.Web.Mvc;

namespace SignalDemo.Controllers
{
 public class HomeController : Controller
 {
 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
{
 <!--引用SignalR庫(kù). -->
 <script src="~/Scripts/jquery.signalR-2.2.1.min.js"></script>
 <!--引用自動(dòng)生成的SignalR 集線器(Hub)腳本.在運(yùn)行的時(shí)候在瀏覽器的Source下可看到 -->
 <script src="~/signalr/hubs"></script>
 <script>
 $(function () {
 // 引用自動(dòng)生成的集線器代理
 var chat = $.connection.serverHub;
 // 定義服務(wù)器端調(diào)用的客戶端sendMessage來(lái)顯示新消息

 chat.client.sendMessage = function (name, message) {
 // 向頁(yè)面添加消息
 $('#discussion').append('<li><strong>' + htmlEncode(name)
 + '</strong>: ' + htmlEncode(message) + '</li>');
 };
 // 設(shè)置焦點(diǎn)到輸入框
 $('#message').focus();
 // 開(kāi)始連接服務(wù)器
 $.connection.hub.start().done(function () {
 $('#sendmessage').click(function () {
 // 調(diào)用服務(wù)器端集線器的Send方法
 chat.server.send($('#message').val());
 // 清空輸入框信息并獲取焦點(diǎn)
 $('#message').val('').focus();
 });
 });
 });

 // 為顯示的消息進(jìn)行Html編碼
 function htmlEncode(value) {
 var encodedValue = $('<div />').text(value).html();
 return encodedValue;
 }
 </script>
}

using System.Web.Mvc;
using System.Web.Routing;

namespace SignalDemo
{
 public class RouteConfig
 {
 public static void RegisterRoutes(RouteCollection routes)
 {
 routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
 routes.MapRoute(
 name: "Default",
 url: "{controller}/{action}/{id}",
 defaults: new { controller = "Home", action = "Chat", id = UrlParameter.Optional }
 );
 }
 }
}

public class ServerHub : Hub
 {
 private static readonly char[] Constant =
 {
 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
 'w', 'x', 'y', 'z',
 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
 'W', 'X', 'Y', 'Z'
 };

 /// <summary>
 /// 供客戶端調(diào)用的服務(wù)器端代碼
 /// </summary>
 /// <param name="message"></param>
 public void Send(string message)
 {
 var name = GenerateRandomName(4);

 // 調(diào)用所有客戶端的sendMessage方法
 Clients.All.sendMessage(name, message);
 }

 /// <summary>
 /// 客戶端連接的時(shí)候調(diào)用
 /// </summary>
 /// <returns></returns>
 public override Task OnConnected()
 {
 Trace.WriteLine("客戶端連接成功");
 return base.OnConnected();
 }

 /// <summary>
 /// 產(chǎn)生隨機(jī)用戶名函數(shù)
 /// </summary>
 /// <param name="length">用戶名長(zhǎng)度</param>
 /// <returns></returns>
 public static string GenerateRandomName(int length)
 {
 var newRandom = new System.Text.StringBuilder(62);
 var rd = new Random();
 for (var i = 0; i < length; i++)
 {
 newRandom.Append(Constant[rd.Next(62)]);
 }
 return newRandom.ToString();
 }
 } 

/// <summary>
 /// 啟動(dòng)SignalR服務(wù)，將SignalR服務(wù)寄宿在WPF程序中
 /// </summary>
 private void StartServer()
 {
 try
 {
 SignalR = WebApp.Start(ServerUri); // 啟動(dòng)SignalR服務(wù)
 }
 catch (TargetInvocationException)
 {
 WriteToConsole("一個(gè)服務(wù)已經(jīng)運(yùn)行在：" + ServerUri);
 // Dispatcher回調(diào)來(lái)設(shè)置UI控件狀態(tài)
 this.Dispatcher.Invoke(() => ButtonStart.IsEnabled = true);
 return;
 }

 this.Dispatcher.Invoke(() => ButtonStop.IsEnabled = true);
 WriteToConsole("服務(wù)已經(jīng)成功啟動(dòng)，地址為：" + ServerUri);
 }

public class ChatHub : Hub
 {
 public void Send(string name, string message)
 {
 Clients.All.addMessage(name, message);
 }

 public override Task OnConnected()
 {
 //
 Application.Current.Dispatcher.Invoke(() =>
 ((MainWindow)Application.Current.MainWindow).WriteToConsole("客戶端連接，連接ID是: " + Context.ConnectionId));

 return base.OnConnected();
 }

 public override Task OnDisconnected(bool stopCalled)
 {
 Application.Current.Dispatcher.Invoke(() =>
 ((MainWindow)Application.Current.MainWindow).WriteToConsole("客戶端斷開(kāi)連接，連接ID是: " + Context.ConnectionId));

 return base.OnDisconnected(true);
 }
 }

 public class Startup
 {
 public void Configuration(IAppBuilder app)
 {
 // 有關(guān)如何配置應(yīng)用程序的詳細(xì)信息，請(qǐng)?jiān)L問(wèn) http://go.microsoft.com/fwlink/?LinkID=316888
 // 允許CORS跨域
 //app.UseCors(CorsOptions.AllowAll);
 app.MapSignalR();
 }
 }

public IHubProxy HubProxy { get; set; }
 const string ServerUri = "http://localhost:8888/signalr";
 public HubConnection Connection { get; set; }

 public MainWindow()
 {
 InitializeComponent();

 // 窗口啟動(dòng)時(shí)開(kāi)始連接服務(wù)
 ConnectAsync();
 }

 /// <summary>
 /// 發(fā)送消息
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void ButtonSend_Click(object sender, RoutedEventArgs e)
 {
 // 通過(guò)代理來(lái)調(diào)用服務(wù)端的Send方法
 // 服務(wù)端Send方法再調(diào)用客戶端的AddMessage方法將消息輸出到消息框中
 HubProxy.Invoke("Send", GenerateRandomName(4), TextBoxMessage.Text.Trim());

 TextBoxMessage.Text = String.Empty;
 TextBoxMessage.Focus();
 }

 private async void ConnectAsync()
 {
 Connection = new HubConnection(ServerUri);
 Connection.Closed += Connection_Closed;

 // 創(chuàng)建一個(gè)集線器代理對(duì)象
 HubProxy = Connection.CreateHubProxy("ChatHub");

 // 供服務(wù)端調(diào)用，將消息輸出到消息列表框中
 HubProxy.On<string, string>("AddMessage", (name, message) =>
 this.Dispatcher.Invoke(() =>
 RichTextBoxConsole.AppendText(String.Format("{0}: {1}\r", name, message))
 ));

 try
 {
 await Connection.Start();
 }
 catch (HttpRequestException)
 {
 // 連接失敗
 return;
 }

 // 顯示聊天控件
 ChatPanel.Visibility = Visibility.Visible;
 ButtonSend.IsEnabled = true;
 TextBoxMessage.Focus();
 RichTextBoxConsole.AppendText("連上服務(wù)：" + ServerUri + "\r");
 }