public static class BarCodeManager{internal static Action<string> BarCodeFound;internal static Action<Exception> Error;static BarCodeManager(){}/// <summary>/// 启动条码扫描/// </summary>/// <param name="barCodeFound">扫描成功执行的操作</param>/// <param name="error">扫描失败的操作</param>/// <param name="barcodeFormat">编码类型，默认为ean_13条形码</param>public static void StartScan(Action<string> barCodeFound, Action<Exception> error, BarcodeFormat barcodeFormat = null){var mainFrame = Application.Current.RootVisual as PhoneApplicationFrame;if (mainFrame != null){if (barcodeFormat == null){barcodeFormat = BarcodeFormat.EAN_13;}BarCodeFound = barCodeFound;Error = error;ZXingReader = GetReader(barcodeFormat);mainFrame.Navigate(new Uri("/ScanCode.xaml", UriKind.Relative));}}private static Reader zXingReader;public static Reader ZXingReader{get{if (zXingReader == null){return new EAN13Reader();}return zXingReader;}set { BarCodeManager.zXingReader = value; }}internal static Reader GetReader(BarcodeFormat format){Reader r;switch (format.Name){case "CODE_128":r = new Code128Reader();break;case "CODE_39":r = new Code39Reader();break;case "EAN_13":r = new EAN13Reader();break;case "EAN_8":r = new EAN8Reader();break;case "ITF":r = new ITFReader();break;case "UPC_A":r = new UPCAReader();break;case "UPC_E":r = new UPCEReader();break;case "QR_CODE":r = new QRCodeReader();break;default:r = null;break;}return r;}}

public partial class ScanCode : PhoneApplicationPage{PhotoCamera photocamera;VideoBrush videoBrush = new VideoBrush();byte[] buffer = null;//存储photocamera 获取的亮度数据Result result = null;public ScanCode(){InitializeComponent();}protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e){if (photocamera == null){photocamera = new PhotoCamera();photocamera.Initialized += new EventHandler<CameraOperationCompletedEventArgs>(photocamera_Initialized);photocamera.AutoFocusCompleted += new EventHandler<CameraOperationCompletedEventArgs>(photocamera_AutoFocusCompleted);video.Fill = videoBrush;videoBrush.SetSource(photocamera);}base.OnNavigatedTo(e);}protected override void OnNavigatingFrom(System.Windows.Navigation.NavigatingCancelEventArgs e){if (photocamera != null){//删除事件处理  msdn备注photocamera.Initialized -= photocamera_Initialized;photocamera.AutoFocusCompleted -= photocamera_AutoFocusCompleted;photocamera.CancelFocus();photocamera.Dispose();}base.OnNavigatingFrom(e);}//对焦操作完成发生void photocamera_AutoFocusCompleted(object sender, CameraOperationCompletedEventArgs e){result = null;try{while (result == null){var binaryBitmap = GetBitmapFromCamera();if (binaryBitmap != null){try{result = BarCodeManager.ZXingReader.decode(binaryBitmap);}catch{}}}if (result != null){BarCodeManager.BarCodeFound(result.Text);}else{　　　　　　　　　　　　//再次执行相机聚焦操作，也可以用DispatcherTimer周期执行GetBitmapFromCamera获取解码数据photocamera.Focus();}}catch (Exception ex){//BarCodeManager.Error(ex);
            }}void photocamera_Initialized(object sender, CameraOperationCompletedEventArgs e){photocamera.FlashMode = FlashMode.Auto;photocamera.Focus();}/// <summary>/// 获取摄像头扫描的图像/// </summary>/// <returns></returns>
        BinaryBitmap GetBitmapFromCamera(){BinaryBitmap binaeryBitmap = null;try{var pixelWidth = (int)photocamera.PreviewResolution.Width;var pixelHeight = (int)photocamera.PreviewResolution.Height;if (buffer == null || buffer.Length != (pixelHeight * pixelWidth)){buffer = new byte[pixelWidth * pixelHeight];}//捕捉亮度数据，创建HybridBinarizer和BinaryBitmap类，返回BinaryBitmap给Reade对象解码
                photocamera.GetPreviewBufferY(buffer);var luminance = new RGBLuminanceSource(buffer, pixelWidth, pixelHeight, true);var binarizer = new HybridBinarizer(luminance);binaeryBitmap = new BinaryBitmap(binarizer);}catch{}return binaeryBitmap;}}

BarCodeManager.StartScan((r) => Dispatcher.BeginInvoke(() =>{tbScanResultBarCode.Text = r;NavigationService.GoBack();}),null);