Windows Phone 8 : Using Push Notifications (part 6) - Handling Push Notification Errors

_myChannel.ErrorOccurred += channel_ErrorOccurred;

The event passes in an error argument that has an ErrorType property that can be used to determine the type of error. You should change the way you alert the user to this based on the type of error. In addition, the handler should use the Dispatcher to ensure that any reporting of these errors occurs on the UI thread (as the ErrorOccurred event could be thrown on any thread):

void channel_ErrorOccurred(object sender,
                           NotificationChannelErrorEventArgs e)
{
  Deployment.Current.Dispatcher.BeginInvoke(() =>
  {
    switch (e.ErrorType)
    {
      case ChannelErrorType.ChannelOpenFailed:
        MessageBox.Show("Failed to open channel");
        break;
      case ChannelErrorType.NotificationRateTooHigh:
        MessageBox.Show("Push Notifications are too frequent.");
        break;
      case ChannelErrorType.PayloadFormatError:
        MessageBox.Show(@"XML or Headers were incorrect
                          for the Push Message");
        break;
      case ChannelErrorType.MessageBadContent:
        MessageBox.Show("Live Tile Data is invalid.");
        break;
      case ChannelErrorType.PowerLevelChanged:
        {
          MessageBox.Show(@"Push Notifications are
                            affected by the current power level");

          // Can get the power level from the event info
          ChannelPowerLevel level =
            (ChannelPowerLevel)e.ErrorAdditionalData;

          switch (level)
          {
            case ChannelPowerLevel.NormalPowerLevel:
              // All Push Messages are processed
              break;
            case ChannelPowerLevel.LowPowerLevel:
              // Only Raw Push Messages are processed
              break;
            case ChannelPowerLevel.CriticalLowPowerLevel:
              // No Push Messages are processed
              break;
          }
          break;
        }
    }
  });
}

The ChannelErrorType is returned in the event arguments and can be used to determine the error types. These error types are detailed in Table 3.

TABLE 3 ChannelErrorType Enumeration

The PowerLevelChanged enumeration’s values are detailed in Table 4.

TABLE 4 ChannelPowerLevel Enumeration