.net mvc中SignalR的使用配置

namespace SingralRedis.Hubs {     interface IChatHub     {         //服务器下发消息到各个客户端         void SendChat(string id, string name, string message);          //用户上线通知         void SendLogin(string id, string name);          //用户下线通知         void SendLogoff(string id, string name);          //接收客户端发送的心跳包并处理         void TriggerHeartbeat(string id, string name);     } }

using Microsoft.AspNet.SignalR; using System; using System.Collections.Generic; using System.Linq; using System.Timers;   namespace SingralRedis.Hubs {     public class ChatHub : Hub,IChatHub     {          public override System.Threading.Tasks.Task OnConnected()         {              string userName = Context.QueryString["userName"]; //获取客户端发送过来的用户名             string userId = Context.QueryString["userId"]; //获取客户端发送过来的用户名             string connectionId = Context.ConnectionId;             if (!string.IsNullOrEmpty(userId))             {                 SendLogin(userId, userName, connectionId);             }             //HttpContext.Current.Application.Add(userName, connectionId); //存储关系             return base.OnConnected();         }         public class UserChat         {             public UserChat()             {                 Count = 0;                 if (Timer == null) Timer = new Timer();                 Timer.Interval = 1000;  //1s触发一次                 Timer.Start();                 Timer.Elapsed += (sender, args) =>                 {                     Count++;                     if (Count >= 20)                     {                         action();  //该用户掉线了，抛出事件通知                         Timer.Stop();                     }                 };             }              private readonly Timer Timer;             public event Action action;             //public event Action action1;              public string UserId { get; set; }             public string ID { get; set; }             public string Name { get; set; }              //内部计数器（每次递增1），如果服务端每5s能收到客户端的心跳包，那么count被重置为0；             //如果服务端20s后仍未收到客户端心跳包，那么视为掉线             public int Count { get; set; }         }          public static class ChatUserCache         {             public static IList<UserChat> userList = new List<UserChat>();         }          private IList<UserChat> userList = ChatUserCache.userList;                        /// <summary>         /// 推送个单个用户         /// </summary>         /// <param name="name">用户名</param>         public void SendToUser(string name)         {             //根据username获取对应的ConnectionId             var user = userList.FirstOrDefault(v => v.Name == name);             if (user != null)             {                 Clients.Client(user.UserId).addNewMessageToPage("新的信息");             }         }          /// <summary>         /// 自发自收         /// </summary>         public void ReturnId()         {             Clients.Caller.CheckId(Context.ConnectionId);         }              /// <summary>         /// 获取全部用户         /// </summary>         public void GetAllUserList()         {             Clients.All.loginUser(userList);         }            public void SendChat(string id, string name, string message)         {             Clients.Client(id).GetChatMsg("<====用户 " + name +" 发送消息 "+ message+" ======>");                      }          public void SendLogin(string id, string name, string connectionId)         {             connectionId = string.IsNullOrEmpty(connectionId) ? connectionId = Context.ConnectionId : connectionId;              if (!userList.Any(v => v.ID == id))             {                 var userInfo = new UserChat() { UserId = connectionId, ID = id, Name = name };                 userInfo.action += () =>                 {                     //用户20s无心跳包应答，则视为掉线，会抛出事件，这里会接住，然后处理用户掉线动作。                     SendLogoff(id, name);                 };                 userList.Add(userInfo);             }             else             {                 var user = userList.FirstOrDefault(v => v.ID == id);                 user.UserId = connectionId;                 user.Count = 0;             }             Clients.All.loginUser(userList);                      }          public void SendLogoff(string id, string name)         {             var userInfo = userList.Where(x => x.ID.Equals(id) && x.Name.Equals(name)).FirstOrDefault();             if (userInfo != null)             {                 var name1 = userInfo.Name;                  if (userList.Remove(userInfo))                 {                     Clients.All.logoffUser(userList);                       SendChat(id, name, "<====用户 " + name + " 退出了讨论组====>");                 }             }         }          public void TriggerHeartbeat(string id, string name)         {             var userInfo = userList.Where(x => x.ID.Equals(id) && x.Name.Equals(name)).FirstOrDefault();             if (userInfo != null)             {                 userInfo.Count = 0;  //收到心跳，重置计数器             }         }     } }