// Event handler to process remote target's presence subscription state
// changes
private void RemotePresence_SubscriptionStateNotificationReceived(object sender,
RemoteSubscriptionStateChangedEventArgs e)
{
foreach (RealTimeAddress address in e.SubscriptionStateChanges.Keys)
{
if (address.Uri == _remoteUserUri)
{
Console.WriteLine("Target {0} subscription state has changed from {1} to {2}",
_remoteUserUri,
e.SubscriptionStateChanges[address].PreviousState,
e.SubscriptionStateChanges[address].State);
}
}
}
private void PresenceView_SubscriptionStateChanged(object sender, RemoteSubscriptionStateChangedEventArgs e)
{
var presenceView = (RemotePresenceView)sender;
var request = (CallbackRequest)presenceView.ApplicationContext;
foreach (var pair in e.SubscriptionStateChanges)
{
if (pair.Value.State == RemotePresentitySubscriptionState.Terminating)
{
this.RemoveRequest(request);
break; // We have only one target in the view. So, we should see this only once for the target.
}
}
}
/// <summary>
/// Log the subscription states that have changed.
/// </summary>
/// <param name="sender">
/// View that saw subscription state changes.
/// </param>
/// <param name="e">Data about the state changes</param>
private void RemotePresenceView_SubscriptionStateChanged(
object sender,
RemoteSubscriptionStateChangedEventArgs e)
{
// Extract the view that raised the event.
RemotePresenceView view = sender as RemotePresenceView;
// The event args can contain multiple StateChanged notifications
foreach (KeyValuePair <RealTimeAddress, RemotePresentityStateChange> stateChanged in
e.SubscriptionStateChanges)
{
Console.WriteLine("\nView: " + view.ApplicationContext
+ "; SubscriptionState for user: "******" has changed from: " + stateChanged.Value.PreviousState
+ " to: " + stateChanged.Value.State + ".");
}
}
void RemoteSubscriptionStateChanged(object sender, RemoteSubscriptionStateChangedEventArgs e)
{
bool completeAction = false;
lock (m_syncRoot)
{
foreach (KeyValuePair <RealTimeAddress, RemotePresentityStateChange> pair in e.SubscriptionStateChanges)
{
if (pair.Value.PreviousState == RemotePresentitySubscriptionState.Subscribing)
{
m_subCount++; // Went from subscribing to some other state. Could be Terminating or Subscribed or WaitingForRetry etc.
}
}
if (m_subCount == m_contacts.Count)
{
completeAction = true;
}
if (completeAction && m_presenceWaitAction != null)
{
m_presenceWaitAction.Complete(null);
}
}
}
void PersistentSubscriptionStateChangedEventHandler(object sender, RemoteSubscriptionStateChangedEventArgs e)
{
if (OnPersistentSubscriptionStateChanged != null)
RaiseEvent(OnPersistentSubscriptionStateChanged, this, e);
}
