/// <summary>
/// Triggered when webcam feed loads both for the first time and every time page is navigated to.
/// If no WebcamHelper has been created, it creates one. Otherwise, simply restarts webcam preview feed on page.
/// </summary>
private async void WebcamFeed_Loaded(object sender, RoutedEventArgs e)
{
if (webcam == null || !webcam.IsInitialized())
{
webcam = new UsbCamera();
await webcam.InitializeAsync();
WebcamFeed.Source = webcam.MediaCaptureInstance;
// Check to make sure MediaCapture isn't null before attempting to start preview. Will be null if no camera is attached.
if (WebcamFeed.Source != null)
{
await webcam.StartCameraPreview();
}
}
else if (webcam.IsInitialized())
{
WebcamFeed.Source = webcam.MediaCaptureInstance;
// Check to make sure MediaCapture isn't null before attempting to start preview. Will be null if no camera is attached.
if (WebcamFeed.Source != null)
{
await webcam.StartCameraPreview();
}
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
try
{
//Sets passed through WecamHelper from MainPage as local webcam object
webcam = e.Parameter as UsbCamera;
}
catch (Exception exception)
{
Debug.WriteLine("Error when navigating to NewUserPage: " + exception.Message);
}
}