How to capture SignalR native client losing connection with server

Question

I am working on a .net client application which utilizes SignalR. I want to notify the user if the connection is down for some reason. How can I capture the disconnect event using the native client?

Answer 1

The client will go into the reconnecting when the connection dies.

Therefore you can tie into the Reconnecting event to see when the connection goes down:

var connection = new Connection("http://myEndPointURL");

connection.Reconnecting += () =>
{
    Console.WriteLine("The connection has gone down, shifting into reconnecting state");
};

Hope this helps!

Answer 2

I was able to capture StateChanged to detect changes in the connection and notify the user.

        connection.StateChanged += (statechange) =>
            {
                Console.WriteLine("Changing from " + statechange.OldState + " to " + statechange.NewState);
            };

This gives me a mechanism to notify the user when the connection is dropped or successfully reconnected.