Signalr cast IHubContext to actual Hub

Question

I'm wondering if it's possible to Cast the result of var hub = GlobalHost.ConnectionManager.GetHubContext<ChatHub>(); To my actual ChatHub class. Because GlobalHost.ConnectionManager.GetHubContext<ChatHub>() as ChatHub fails

On my ChatHub class I have a method UpdateTime():

public void SendTimeUpdate(DateTime time, string auth)
{
    Clients.All.UpdateTime(time, auth);
}

And I want to call it from my other class. Since I can't cast to ChatHub and invoke the SendUpdate I have to go:

GlobalHost.ConnectionManager.GetHubContext<ChatHub>().Clients.All.UpdateTime(time, auth);

But if I go this road, the method SendTimeUpdate isn't added in the proxy script /signalr/hubs

Is there a solution for this problem? I want to get the typed Hub instance and not call stuff directly on the Clients property of the IHubContext.

So the method UpdateTime needs to be defined in your client code. Could you post whatever javascript you have? — mrtig

N. Taylor Mullen N. Taylor Mullen · Accepted Answer · 2014-01-13T05:51:54

No you cannot cast the result of ....GetHubContext<.... to your hub class. Sorry :(.

The GetHubContext approach returns an IHubContext when a Hub is only an IHub.

If you'd like to centralize the logic just make a method that you can call into from your hub and from your external service.

Signalr cast IHubContext to actual Hub

2 Answers