ASP.NET MVC-获取用户的登录状态

我认为一种选择是使用一些实时解决方案。例如SignalR。用户登录后，将其连接到集线器。OnConnected（）操作保存其状态。然后OnDisconnected（）从“ OnlineRepository”中删除。

用示例更新这是我在asp.Net Mvc 5应用程序中执行此操作的方法。

• 持有单个用户的Model类，例如：

  
      public class SingleConnection 
      {
          public SingleConnection()
          {
              ConnectionId = new List();
          }
          public string Id { get; set; }
          public List ConnectionId { get; set; }
      }
  

• 连接映射类，有助于添加/删除列表中的用户和从列表中获取用户

  
      public class ConnectionMapping
      {
          private readonly List _connections = new List();
          public int Count
          {
              get
              {
                  return _connections.Count;
              }
          }
          public void Add(string key, string connectionId)
          {
              lock (_connections)
              {
                  var sn = _connections.Where(x => x.Id == key).FirstOrDefault();
                  if (sn != null) // there is a connection with this key
                  {
                      _connections.Find(x => x.Id == key).ConnectionId.Add(connectionId);
                  }
                  else
                  {
                      _connections.Add(new SingleConnection { Id = key, ConnectionId = new List { connectionId } });
                  }
              }
          }
          public List GetConnections(string id)
          {
              var con = _connections.Find(x => x.Id == id);
              return con != null ?  con.ConnectionId : new List();
          }
          public List AllConnectionIds() 
          {
              List results = new List();
               var allItems = _connections.Where(x => x.ConnectionId.Count > 0).ToList();
               foreach (var item in allItems)
               {
                   results.AddRange(item.ConnectionId);
               }
               return results;
          }
          public List AllKeys() 
          {
              return _connections.Select(x => x.Id).ToList();
          }
          public void Remove(string key, string connectionId)
          {
              lock (_connections)
              {
                  var item = _connections.Find(x => x.Id == key);
                  if (_connections.Find(x => x.Id == key) != null)
                  {
                      _connections.Find(x => x.Id == key).ConnectionId.Remove(connectionId);
                      if (_connections.Find(x => x.Id == key).ConnectionId.Count == 0)
                      {
                          _connections.Remove(item);
                      }
                  }
              }
          }
      }
  

  • 在我的中心班

  
  private void IsActive(string connection, bool connected) 
  {
      Clients.All.clientconnected(connection, connected);
  }
  public override Task OnConnected()
  {
      string name = Context.User.Identity.Name;
      _connections.Add(name, Context.ConnectionId);
      IsActive(name, true);
      return base.OnConnected();
  }
  public override Task OnDisconnected(bool stopCalled)
  {
      string name = Context.User.Identity.Name;
      _connections.Remove(name, Context.ConnectionId);
      IsActive(name, false);
      return base.OnDisconnected(stopCalled);
  }
  public override Task OnReconnected()
  {
      string name = Context.User.Identity.Name;
      if (!_connections.GetConnections(name).Contains(Context.ConnectionId))
      {
          _connections.Add(name, Context.ConnectionId);
      }
      IsActive(name, false);
      return base.OnReconnected();
  }
  

• 在_Layout.cshtml中

  
  // reference scripts
  // add a callback or the OnConnected() Will not fire
  chat.client.clientconnected = function (id,active){
  /*
  this will be called everytime a user connect or disconnect to the hub
  */
  }
  $.connection.hub.start();
  

现在，我可以实时获取所有在线用户。
注意：这是一个InMemory解决方案。其他解决方案在这里

希望这可以帮助...