How to generate Uri to send push notifications for windows phone 7

Question

Where do I register my app to get Uri to send push notifications

Answer 1

Hi Eric,
Thank you for your reply. I have created instance for HttpNotificationChannel. Plz find the below code:
 public MainPage()
/// Holds the push channel that is created or found.
            HttpNotificationChannel pushChannel;
// The name of our push channel.
string channelName = "TileSampleChannel";
            InitializeComponent();
// Try to find the push channel.
            pushChannel = HttpNotificationChannel.Find(channelName);
// If the channel was not found, then create a new connection to the push service.
if (pushChannel == null)
                pushChannel =
new HttpNotificationChannel(channelName);
// Register for all the events before attempting to open the channel.
                pushChannel.ChannelUriUpdated +=
new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
                pushChannel.ErrorOccurred +=
new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);
                pushChannel.Open();
// Bind this new channel for Tile events.
                pushChannel.BindToShellTile();
else
// The channel was already open, so just register for all the events.
                pushChannel.ChannelUriUpdated +=
new EventHandler<NotificationChannelUriEventArgs>(PushChannel_ChannelUriUpdated);
                pushChannel.ErrorOccurred +=
new EventHandler<NotificationChannelErrorEventArgs>(PushChannel_ErrorOccurred);
// Display the URI for testing purposes. Normally, the URI would be passed back to your web service at this point.
                System.Diagnostics.Debug.WriteLine(pushChannel.ChannelUri.ToString());
                MessageBox.Show(String.Format("Channel Uri is {0}",
                    pushChannel.ChannelUri.ToString()));
void PushChannel_ChannelUriUpdated(object sender, NotificationChannelUriEventArgs e)
            Dispatcher.BeginInvoke(() =>
// Display the new URI for testing purposes. Normally, the URI would be passed back to your web service at this point.
                System.Diagnostics.Debug.WriteLine(e.ChannelUri.ToString());
                MessageBox.Show(String.Format("Channel Uri is {0}",
                    e.ChannelUri.ToString()));
              But I am getting NullReferenceException at pushchannel.ChannelUri. And this ChannelUriUpdated event is not triggering. I am unable to get the channel uri.
 Any other way to register my app for getting the Uri? I would be very happy if u send solution.
        Thanks in advance.
Seetha