public BarCode()
{
InitializeComponent();
_reader = new EAN13Reader();
_timer = new DispatcherTimer();
_timer.Interval = TimeSpan.FromMilliseconds(250);
_timer.Tick += (o, arg) => ScanPreviewBuffer();
}
private void OnPhotoCameraInitialized(object sender, CameraOperationCompletedEventArgs e)
{
int width = Convert.ToInt32(PhotoCamera.PreviewResolution.Width);
int height = Convert.ToInt32(PhotoCamera.PreviewResolution.Height);
luminance = new PhotoCameraLuminanceSource(width, height);
qrReader = new QRCodeReader();
ean13Reader = new EAN13Reader();
code39Reader = new Code39Reader();
timer = new Timer((s) => ScanPreviewBuffer(), null, 0, 250);
}