Get number of listeners, clients connected to SignalR hub

by

There is no way to get this count from SignalR as such. You have to use the OnConnect() and OnDisconnect() methods on the Hub to keep the count yourself.

Simple example with a static class to hold the count:

public static class UserHandler
{
    public static HashSet<string> ConnectedIds = new HashSet<string>();
}

public class MyHub : Hub
{
    public override Task OnConnectedAsync()
    {
        UserHandler.ConnectedIds.Add(Context.ConnectionId);
        return base.OnConnectedAsync();
    }

    public override Task OnDisconnectedAsync(Exception exception)
    {
        UserHandler.ConnectedIds.Remove(Context.ConnectionId);
        return base.OnDisconnectedAsync(exception);
    }
}

You then get the count from UserHandler.ConnectedIds.Count.

More Related Contents:

  1. SignalR doesn’t use Session on server
  2. SignalR – Checking if a user is still connected
  3. Passing data between different controller action methods
  4. MVC Razor view nested foreach’s model
  5. How to implement real time data for a web page
  6. How to get current user timezone in c#
  7. Why Interface Layer/Abstract classes required in our project? [closed]
  8. Passing object in RedirectToAction
  9. Adding your own HtmlHelper in ASP.NET MVC 3
  10. C# mvc 3 using selectlist with selected value in view
  11. ViewModel validation for a List
  12. What happens in BeginProcessRequest()?
  13. How to set web.config file to show full error message
  14. How to use custom Authorize attribute for roles as well as a specific user?
  15. @Html.HiddenFor does not work on Lists in ASP.NET MVC
  16. Run command line code programmatically using C#
  17. Redirect to another page when user is not authorized in asp.net mvc3
  18. DisplayFormat ApplyFormatInEditMode
  19. Multiple signalR connections/hubs on your website
  20. Signalr/Hub not loading in IIS 7 but working correctly in Visual Studio
  21. How to use multiple form elements in ASP.NET MVC
  22. Can gzip compression be selectively disabled in ASP.NET/IIS 7?
  23. Determine if a number can be made with prepicked numbers and times
  24. The provider is not compatible with the version of Oracle client
  25. How to implement “Access-Control-Allow-Origin” header in asp.net
  26. How can I export a GridView.DataSource to a datatable or dataset?
  27. Easiest way to parse “querystring” formatted data
  28. GeneralLink in Sitecore
  29. Change cell color on different values – Gridview
  30. When to use Request.Cookies over Response.Cookies?

Leave a Comment