protected async override void OnNavigatedFrom(NavigationEventArgs e)
{
base.OnNavigatedFrom(e);
// Tell Chatrrom you are leaving.
await SignalRChatHub.Invoke("LeaveChat", "DeviceID123", "ChatUserSam");
// Unwire event handler.
SignalRServerNotification -= new SignalRServerHandler(SignalRHub_SignalRServerNotification);
}
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
HubConnection chatConnection = new HubConnection("http://localhost:1141/");
SignalRChatHub = chatConnection.CreateHubProxy("ChatHub");
// Wire-up to listen to custom event from SignalR Hub.
SignalRServerNotification += new SignalRServerHandler(SignalRHub_SignalRServerNotification);
// Start connection back to Hub.
try
{
await chatConnection.Start();
if (chatConnection.State == Microsoft.AspNet.SignalR.Client.ConnectionState.Connected)
{
// Join the ChatRoom.
await SignalRChatHub.Invoke("JoinChat", "DeviceID123", "ChatUserSam");
// Listen to chat events on SignalR Server & wire them up appropriately.
SignalRChatHub.On <string>("addChatMessage", message =>
{
SignalREventArgs chatArgs = new SignalREventArgs();
chatArgs.ChatMessageFromServer = message;
// Raise custom event & let it bubble up.
SignalRServerNotification(this, chatArgs);
});
}
}
catch (Exception)
{
// Do some error handling.
}
}
