SignalR OnConnected Not Hitting But Still Able to Invoke Client Side Functions From Server - signalr

Question

I have the following TestHub that does nothing but invoke a client side sayHello() function.
public class TestHub:Hub
{
public void SayHello()
{
Context.Clients.All.sayHello();
}
public override Task OnConnected()
{
//do some custom stuff
return base.OnConnected();
}
}
On the client, I have the following:
var connection = $.hubConnection('http://localhost:12345/signalr');
var proxy = connection.createHubProxy('TestHub');
proxy.on('sayHello',function(){
console.log('sayHello fired');
})
connection.start().done(function(){
console.debug('Connected');
})
When I call SayHello() on my TestHub the client prints out the following perfectly fine
sayHelloFired
and when the proxy first loads, it prints the following to the console perfectly fine.
Connected
However, if I throw a breakpoint in the OnConnected() method on TestHub, then it does not hit.
All the posts discussing similar problems suggest that their is no handlers being subscribed on the client side, but that is not the case here. How could this be working and OnConnected() is never fired?

Answer 1

Your code didn't compile for me because of the
Context.Clients.All.sayHello();
Line. Context here tries to refer to Hub.Context which is an HubCallerContext class. I think you want to refer to Hub.Clients which is an IHubCallerConnectionContext.
I replaced that line to
Clients.All.sayHello();
And my breakpoint got invoked.
However I am surprised you made it run and got messages on console.
BTW You are right about that, when using javascript clients, if there is no subscription to any event in the hub, the OnConnected methond won't be invoked.
But that is not the case here.