Asp.NET MVC中使用SignalR实现推送功能_实用技巧_

 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' }; /// 
 /// 供客户端调用的服务器端代码 /// 
 ///  public void Send(string message) { var name = GenerateRandomName(4); // 调用所有客户端的sendMessage方法 Clients.All.sendMessage(name, message); } /// 
 /// 产生随机用户名函数 /// 
 /// 用户名长度 ///  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"; } 
Chat
 @section scripts {  } 

 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' }; /// 
 /// 供客户端调用的服务器端代码 /// 
 ///  public void Send(string message) { var name = GenerateRandomName(4); // 调用所有客户端的sendMessage方法 Clients.All.sendMessage(name, message); } /// 
 /// 客户端连接的时候调用 /// 
 ///  public override Task OnConnected() { Trace.WriteLine("客户端连接成功"); return base.OnConnected(); } /// 
 /// 产生随机用户名函数 /// 
 /// 用户名长度 ///  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(); } } 

 /// 
 /// 启动SignalR服务，将SignalR服务寄宿在WPF程序中 /// 
 private void StartServer() { try { SignalR = WebApp.Start(ServerUri); // 启动SignalR服务 } catch (TargetInvocationException) { WriteToConsole("一个服务已经运行在：" + ServerUri); // Dispatcher回调来设置UI控件状态 this.Dispatcher.Invoke(() => ButtonStart.IsEnabled = true); return; } this.Dispatcher.Invoke(() => ButtonStop.IsEnabled = true); WriteToConsole("服务已经成功启动，地址为：" + 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("客户端连接，连接ID是: " + Context.ConnectionId)); return base.OnConnected(); } public override Task OnDisconnected(bool stopCalled) { Application.Current.Dispatcher.Invoke(() => ((MainWindow)Application.Current.MainWindow).WriteToConsole("客户端断开连接，连接ID是: " + Context.ConnectionId)); return base.OnDisconnected(true); } } public class Startup { public void Configuration(IAppBuilder app) { // 有关如何配置应用程序的详细信息，请访问 http://go.microsoft.com/fwlink/?LinkID=316888 // 允许CORS跨域 //app.UseCors(CorsOptions.AllowAll); app.MapSignalR(); } }