<Pagex:Class="SuperTools.Views.BarcodePage"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:local="using:SuperTools.Views"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"><Page.Transitions><TransitionCollection><NavigationThemeTransition><SlideNavigationTransitionInfo /></NavigationThemeTransition></TransitionCollection></Page.Transitions><Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"><Grid x:Name="LayoutRoot" ><Grid x:Name="ContentPanel" ><!--视频流预览--><CaptureElement x:Name="VideoCapture" Stretch="UniformToFill"/><Grid Width="300" Height="300" x:Name="ViewGrid"><Rectangle Width="3" Height="50" Fill="Orange" HorizontalAlignment="Left" VerticalAlignment="Top"/><Rectangle Width="3" Height="50" Fill="Orange" HorizontalAlignment="Right" VerticalAlignment="Top"/><Rectangle Width="3" Height="50" Fill="Orange" HorizontalAlignment="Left" VerticalAlignment="Bottom"/><Rectangle Width="3" Height="50" Fill="Orange" HorizontalAlignment="Right" VerticalAlignment="Bottom"/><Rectangle Width="50" Height="3" Fill="Orange" HorizontalAlignment="Left" VerticalAlignment="Top"/><Rectangle Width="50" Height="3" Fill="Orange" HorizontalAlignment="Right" VerticalAlignment="Top"/><Rectangle Width="50" Height="3" Fill="Orange" HorizontalAlignment="Left" VerticalAlignment="Bottom"/><Rectangle Width="50" Height="3" Fill="Orange" HorizontalAlignment="Right" VerticalAlignment="Bottom"/><Rectangle x:Name="recScanning"  Margin="12,0,12,0" VerticalAlignment="Center" Height="2" Fill="Green" RenderTransformOrigin="0.5,0.5" /></Grid></Grid></Grid></Grid>
</Page>

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using System.Threading.Tasks;
using Windows.ApplicationModel;
using Windows.Devices.Enumeration;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Graphics.Display;
using Windows.Graphics.Imaging;
using Windows.Media;
using Windows.Media.Capture;
using Windows.Media.Devices;
using Windows.Media.MediaProperties;
using Windows.Storage;
using Windows.Storage.FileProperties;
using Windows.Storage.Streams;
using Windows.UI.Core;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Navigation;
using ZXing;// https://go.microsoft.com/fwlink/?LinkId=234238 上介绍了“空白页”项模板namespace SuperTools.Views
{/// <summary>/// 可用于自身或导航至 Frame 内部的空白页。/// </summary>public sealed partial class BarcodePage : Page{private Result _result;private MediaCapture _mediaCapture;private DispatcherTimer _timer;private bool IsBusy;private bool _isPreviewing = false;private bool _isInitVideo = false;BarcodeReader barcodeReader;private static readonly Guid RotationKey = new Guid("C380465D-2271-428C-9B83-ECEA3B4A85C1");public BarcodePage(){barcodeReader = new BarcodeReader{AutoRotate = true,Options = new ZXing.Common.DecodingOptions { TryHarder = true }};this.InitializeComponent();this.NavigationCacheMode = NavigationCacheMode.Required;Application.Current.Suspending += Application_Suspending;Application.Current.Resuming += Application_Resuming;}private async void Application_Suspending(object sender, SuspendingEventArgs e){// Handle global application events only if this page is activeif (Frame.CurrentSourcePageType == typeof(MainPage)){var deferral = e.SuspendingOperation.GetDeferral();await CleanupCameraAsync();deferral.Complete();}}private void Application_Resuming(object sender, object o){// Handle global application events only if this page is activeif (Frame.CurrentSourcePageType == typeof(MainPage)){InitVideoCapture();}}protected override async void OnNavigatingFrom(NavigatingCancelEventArgs e){// Handling of this event is included for completenes, as it will only fire when navigating between pages and this sample only includes one pageawait CleanupCameraAsync();}protected override void OnNavigatedTo(NavigationEventArgs e){base.OnNavigatedTo(e);InitVideoCapture();}private async Task CleanupCameraAsync(){if (_isPreviewing){await StopPreviewAsync();}_timer.Stop();if (_mediaCapture != null){_mediaCapture.Dispose();_mediaCapture = null;}}private void InitVideoTimer(){_timer = new DispatcherTimer();_timer.Interval = TimeSpan.FromSeconds(1);_timer.Tick += _timer_Tick;_timer.Start();}private async Task StopPreviewAsync(){_isPreviewing = false;await _mediaCapture.StopPreviewAsync();// Use the dispatcher because this method is sometimes called from non-UI threadsawait Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>{VideoCapture.Source = null;});}private async void _timer_Tick(object sender, object e){try{if (!IsBusy){IsBusy = true;var previewProperties = _mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview) as VideoEncodingProperties;VideoFrame videoFrame = new VideoFrame(BitmapPixelFormat.Bgra8, (int)previewProperties.Width, (int)previewProperties.Height);VideoFrame previewFrame = await _mediaCapture.GetPreviewFrameAsync(videoFrame);WriteableBitmap bitmap = new WriteableBitmap(previewFrame.SoftwareBitmap.PixelWidth, previewFrame.SoftwareBitmap.PixelHeight);previewFrame.SoftwareBitmap.CopyToBuffer(bitmap.PixelBuffer);await Task.Factory.StartNew(async () => { await ScanBitmap(bitmap); });}IsBusy = false;await Task.Delay(50);}catch (Exception){IsBusy = false;}}/// <summary>/// 解析二维码图片/// </summary>/// <param name="writeableBmp">图片</param>/// <returns></returns>private async Task ScanBitmap(WriteableBitmap writeableBmp){try{await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>{_result = barcodeReader.Decode(writeableBmp.PixelBuffer.ToArray(), writeableBmp.PixelWidth, writeableBmp.PixelHeight, RGBLuminanceSource.BitmapFormat.Unknown);if (_result != null){//TODO: 扫描结果：_result.Text
                    }});}catch (Exception){}}private async void InitVideoCapture(){///摄像头的检测  var cameraDevice = await FindCameraDeviceByPanelAsync(Windows.Devices.Enumeration.Panel.Back);if (cameraDevice == null){System.Diagnostics.Debug.WriteLine("No camera device found!");return;}var settings = new MediaCaptureInitializationSettings{StreamingCaptureMode = StreamingCaptureMode.Video,MediaCategory = MediaCategory.Other,AudioProcessing = AudioProcessing.Default,VideoDeviceId = cameraDevice.Id};_mediaCapture = new MediaCapture();await _mediaCapture.InitializeAsync(settings);VideoCapture.Source = _mediaCapture;await _mediaCapture.StartPreviewAsync();var props = _mediaCapture.VideoDeviceController.GetMediaStreamProperties(MediaStreamType.VideoPreview);props.Properties.Add(RotationKey, 90);await _mediaCapture.SetEncodingPropertiesAsync(MediaStreamType.VideoPreview, props, null);var focusControl = _mediaCapture.VideoDeviceController.FocusControl;if (focusControl.Supported){await focusControl.UnlockAsync();var setting = new FocusSettings { Mode = FocusMode.Continuous, AutoFocusRange = AutoFocusRange.FullRange };focusControl.Configure(setting);await focusControl.FocusAsync();}_isPreviewing = true;_isInitVideo = true;InitVideoTimer();}private static async Task<DeviceInformation> FindCameraDeviceByPanelAsync(Windows.Devices.Enumeration.Panel desiredPanel){var allVideoDevices = await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture);DeviceInformation desiredDevice = allVideoDevices.FirstOrDefault(x => x.EnclosureLocation != null && x.EnclosureLocation.Panel == desiredPanel);return desiredDevice ?? allVideoDevices.FirstOrDefault();}}
}