PeerWatcher.Added Événement

// Register
event_token Added(TypedEventHandler<PeerWatcher, PeerInformation const&> const& handler) const;

// Revoke with event_token
void Added(event_token const* cookie) const;

// Revoke with event_revoker
PeerWatcher::Added_revoker Added(auto_revoke_t, TypedEventHandler<PeerWatcher, PeerInformation const&> const& handler) const;

public event TypedEventHandler<PeerWatcher,PeerInformation> Added;

function onAdded(eventArgs) { /* Your code */ }
peerWatcher.addEventListener("added", onAdded);
peerWatcher.removeEventListener("added", onAdded);
- or -
peerWatcher.onadded = onAdded;

Public Custom Event Added As TypedEventHandler(Of PeerWatcher, PeerInformation) 

Type d'événement

Configuration requise pour Windows

Remarques

Important

Pour Windows Phone applications 8.x, l’appel de PeerFinder.ConnectAsync à partir d’un gestionnaire d’événements Added échoue. Au lieu de cela, appelez-le en dehors de ce gestionnaire d’événements, par exemple, lorsque l’utilisateur a explicitement choisi de se connecter à un homologue.

Une fois que vous avez démarré PeerWatcheren appelant la méthode Start, l’événement Addedevent est déclenché pour chaque application homologue trouvée dans la plage sans fil. PeerWatcher continue l’analysedes applications homologues dans la plage jusqu’à ce que vous appeliez la méthode Stop. À l’aide de Addedevent, vous pouvez afficher des applications homologues à l’utilisateur à mesure qu’elles sont trouvées.

private PeerWatcher _peerWatcher;
private bool _peerWatcherIsRunning = false;
private bool _peerFinderStarted = false;

// The list of peers discovered by the PeerWatcher.
ObservableCollection<PeerInformation> _discoveredPeers = new ObservableCollection<PeerInformation>();
void PeerFinder_StartPeerWatcher(object sender, RoutedEventArgs e)
{
    if (!_peerFinderStarted)
    {
        // PeerFinder must be started first.
        return;
    }

    if (_peerWatcherIsRunning)
    {
        // PeerWatcher is already running.
        return;
    }

    try
    {
        if (_peerWatcher == null)
        {
            _peerWatcher = PeerFinder.CreateWatcher();

            // Add PeerWatcher event handlers. Only add handlers once.
            _peerWatcher.Added += PeerWatcher_Added;
            _peerWatcher.Removed += PeerWatcher_Removed;
            _peerWatcher.Updated += PeerWatcher_Updated;
            _peerWatcher.EnumerationCompleted += PeerWatcher_EnumerationCompleted;
            _peerWatcher.Stopped += PeerWatcher_Stopped;
        }

        // Empty the list of discovered peers.
        _discoveredPeers.Clear();

        // Start the PeerWatcher.
        _peerWatcher.Start();

        _peerWatcherIsRunning = true;
    }
    catch (Exception ex)
    {
        // Exceptions can occur if PeerWatcher.Start is called multiple times or
        // PeerWatcher.Start is called the PeerWatcher is stopping.
    }
}

protected override void OnNavigatingFrom(NavigatingCancelEventArgs e)
{
    if (_peerWatcher != null)
    {
        // Remove event handlers.
        _peerWatcher.Added -= PeerWatcher_Added;
        _peerWatcher.Removed -= PeerWatcher_Removed;
        _peerWatcher.Updated -= PeerWatcher_Updated;
        _peerWatcher.EnumerationCompleted -= PeerWatcher_EnumerationCompleted;
        _peerWatcher.Stopped -= PeerWatcher_Stopped;

        _peerWatcher = null;
    }
}

private void PeerWatcher_Added(PeerWatcher sender, PeerInformation peerInfo)
{
    var result = Dispatcher.RunAsync(CoreDispatcherPriority.Low, () =>
    {
        lock (this)
        {
            _discoveredPeers.Add(peerInfo);
        }
    });
}

S’applique à

Voir aussi

• Proximité et appui (C#/VB/C++)
• Exemple de proximité