SignalR + MVC5 简单示例

本文和前一篇文章很类似，只不过是把 SignalR 应用在了 MVC 中

新建项目，选择 MVC 模板

　　安装 SignalR

Install-Package Microsoft.AspNet.SignalR

　　在项目中添加文件夹 Hubs

　　在 Hubs 文件夹中添加 SignalR Hub Class (V2)

　　代码如下

using System;using System.Collections.Generic;using System.Linq;using System.Web;using Microsoft.AspNet.SignalR;namespace SignalRChatMVC5.Hubs{  public class ChatHub : Hub  {    public void Send(string name, string message)    {      // Call the addNewMessageToPage method to update clients.      Clients.All.addNewMessageToPage(name, message);    }  }}

　　添加OWIN Startup Class

　　代码如下

using System;using System.Threading.Tasks;using Microsoft.Owin;using Owin;[assembly: OwinStartup(typeof(SignalRChatMVC5.Startup))]namespace SignalRChatMVC5{  public class Startup  {    public void Configuration(IAppBuilder app)    {      // Any connection or hub wire up and configuration should go here      app.MapSignalR();    }  }}

　　在 HomeController 中添加方法 Chat

public ActionResult Chat(){  return View();}

　　右击添加 View

　　代码如下

@{  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='/images/loading.gif' data-original="~/Scripts/jquery.signalR-2.2.0.min.js"></script>  <!--Reference the autogenerated SignalR hub script. -->  <script src='/images/loading.gif' data-original="~/signalr/hubs"></script>  <!--SignalR script to update the chat page and send messages.-->  <script>    $(function () {      // Reference the auto-generated proxy for the hub.      var chat = $.connection.chatHub;      // Create a function that the hub can call back to display messages.      chat.client.addNewMessageToPage = function (name, message) {        // Add the message to the page.        $('#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();      // Start the connection.      $.connection.hub.start().done(function () {        $('#sendmessage').click(function () {          // Call the Send method on the hub.          chat.server.send($('#displayname').val(), $('#message').val());          // Clear text box and reset focus for next comment.          $('#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>}

　　运行效果（开启两个浏览器窗口）