// Discovery of existing sessions
// Handles the addition, removal, or updating of a session
public async void DiscoverSessions()
{
try
{
RemoteSystemAccessStatus status = await RemoteSystem.RequestAccessAsync();
// Checking that remote system access is allowed - ensure capability in the project manifest is set
if (status != RemoteSystemAccessStatus.Allowed)
{
SendDebugMessage("Access is denied, ensure the \'bluetooth\' and \'remoteSystem\' capabilities are set.");
return;
}
// Create watcher to observe for added, updated, or removed sessions
m_sessionWatcher = RemoteSystemSession.CreateWatcher();
m_sessionWatcher.Added += RemoteSystemSessionWatcher_RemoteSessionAdded;
m_sessionWatcher.Removed += RemoteSystemSessionWatcher_RemoteSessionRemoved;
m_sessionWatcher.Start();
SendDebugMessage("Session discovery started.");
}
catch (Win32Exception)
{
SendDebugMessage("Session discovery failed.");
}
}
private static void OnSessionWatcherAdded(RemoteSystemSessionWatcher sender, RemoteSystemSessionAddedEventArgs args)
{
DebugString($"Session Added {args.SessionInfo.DisplayName}: {args.SessionInfo.ControllerDisplayName}");
AvailableSessions.Add(args.SessionInfo);
SessionListUpdated?.Invoke(null, EventArgs.Empty);
}
private void RemoteSystemSessionWatcher_RemoteSessionRemoved(RemoteSystemSessionWatcher sender, RemoteSystemSessionRemovedEventArgs args)
{
SendDebugMessage($"Session {args.SessionInfo.DisplayName}:{args.SessionInfo.ControllerDisplayName} was ended by host.");
SessionRemoved(this, new SessionEventArgs()
{
SessionInfo = args.SessionInfo
});
}
// Discovered sessions are joined, messsge channel established
private void RemoteSystemSessionWatcher_RemoteSessionAdded(RemoteSystemSessionWatcher sender, RemoteSystemSessionAddedEventArgs args)
{
SendDebugMessage($"Discovered Session {args.SessionInfo.DisplayName}:{args.SessionInfo.ControllerDisplayName}.");
SessionFound(this, new SessionEventArgs()
{
SessionInfo = args.SessionInfo
});
}
private async void RemoteSystemSessionWatcher_RemoteSessionAdded(RemoteSystemSessionWatcher sender, RemoteSystemSessionAddedEventArgs args)
{
Debug.WriteLine($"Discovered Session {args.SessionInfo.DisplayName}:{args.SessionInfo.ControllerDisplayName}.");
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
sessionNames.Add(args.SessionInfo);
SessionList.ItemsSource = sessionNames;
});
}
public void OnDescoverSessionAsync(object sender, RoutedEventArgs e)
{
if (sessionWatcher != null)
{
return;
}
// 建立 Watcher 來查看有哪些 Sessions 被建立或是刪除
sessionWatcher = RemoteSystemSession.CreateWatcher();
sessionWatcher.Added += (s, a) => {
// 將找到的 RemoteSystemInfo 加入 UI 顯示
RemoteSystemSessionInfo sessionInfo = a.SessionInfo;
var addedTask = dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
sessionList.Add(sessionInfo);
});
};
sessionWatcher.Removed += (s, a) => {
// 將已經結束的 session 從 UI 移除
var removedSession = a.SessionInfo;
var exist = sessionList.Where(x => x.ControllerDisplayName == removedSession.ControllerDisplayName && x.DisplayName == removedSession.DisplayName).FirstOrDefault();
if (exist != null)
{
var removedTask = dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
sessionList.Remove(exist);
});
}
};
sessionWatcher.Updated += (s, a) => {
// 講更新的 RemoteSystemInfo 加入到 UI
var updatedSession = a.SessionInfo;
var exist = sessionList.Where(x => x.ControllerDisplayName == updatedSession.ControllerDisplayName && x.DisplayName == updatedSession.DisplayName).FirstOrDefault();
if (exist != null)
{
var updatedTask = dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
sessionList.Remove(exist);
sessionList.Add(updatedSession);
});
}
};
sessionWatcher.Start();
}
public void EndSession()
{
if (m_currentSession != null)
{
m_currentSession.Dispose();
}
if (m_sessionWatcher != null)
{
m_sessionWatcher.Stop();
m_sessionWatcher.Added -= RemoteSystemSessionWatcher_RemoteSessionAdded;
m_sessionWatcher.Removed -= RemoteSystemSessionWatcher_RemoteSessionRemoved;
m_sessionWatcher = null;
}
SendDebugMessage("Session ended.");
}
public static async Task DiscoverSessionsAsync()
{
var status = await RemoteSystem.RequestAccessAsync();
if (status == RemoteSystemAccessStatus.Allowed)
{
_sessionWatcher?.Stop();
AvailableSessions.Clear();
_sessionWatcher = RemoteSystemSession.CreateWatcher();
_sessionWatcher.Added += OnSessionWatcherAdded;
_sessionWatcher.Removed += OnSessionWatcherRemoved;
_sessionWatcher.Updated += OnSessionWatcherUpdated;
_sessionWatcher.Start();
}
}
public async void DiscoverSessions()
{
Debug.WriteLine("InsideSessionDiscovery");
try
{
RemoteSystemAccessStatus status = await RemoteSystem.RequestAccessAsync();
if (status != RemoteSystemAccessStatus.Allowed)
{
Debug.WriteLine("Access Denied");
return;
}
m_sessionWatcher = RemoteSystemSession.CreateWatcher();
m_sessionWatcher.Added += RemoteSystemSessionWatcher_RemoteSessionAdded;
m_sessionWatcher.Start();
Debug.WriteLine("Starting Discovery");
}
catch (Win32Exception)
{
Debug.WriteLine("Discovery Failed");
}
}
