Count visitor online wrong

Question

User-1764397001 posted

This is my Code :

Startup

Imports Microsoft.Owin
Imports Owin

Public Class Startup
    Public Sub Configuration(app As IAppBuilder)
        app.MapSignalR()
    End Sub
End Class

MyHub

Imports Microsoft.AspNet.SignalR
Imports Microsoft.AspNet.SignalR.Hubs
<HubName("OnlineHub")>
Public Class OnlineHub
    Inherits Hub
    Shared _hitCount As Integer = 0

    Public Sub RecordHit()
        _hitCount += 1
        Clients.All.onRecordHit(_hitCount)
    End Sub

    Public Overrides Function OnDisconnected(stopCalled As Boolean) As System.Threading.Tasks.Task
        _hitCount -= 1
        Clients.All.onRecordHit(_hitCount)
        Return MyBase.OnDisconnected(stopCalled)
    End Function
End Class

My SCript

<script type="text/javascript">
        $(function () {
            
            var connection = $.hubConnection();
            var hub = connection.createHubProxy("OnlineHub");
            hub.on("onRecordHit", function (hitCount) {
                $('#pagehits').text(hitCount);
            });
            connection.start(function () {
                hub.invoke('RecordHit');
            });
        })
    </script>

I do not know why ?
In a time to use, it miscalculated.
You can see the image below. Negative Number

Please help me

Answer 1

User61956409 posted

Hi Huy,

As far as I know, we need to override the OnConnected,OnDisconnected,OnReconnected events of Hubs class to track user count. You could refer to the following articles to count online users.

https://www.simple-talk.com/dotnet/asp.net/tracking-online-users-with-signalr/

https://code.msdn.microsoft.com/SignalR-Simple-Users-On-88936819

http://deanhume.com/home/blogpost/get-the-number-of-users-that-are-online-using-signalr/1095

Best Regards,

Fei Han

Answer 2

User-1764397001 posted

I used second link to Fix it. Thanks so much! Have nice day