原文:

这个示例演示整合了Aran和微软的示例，无需修改即可运行。

支持识别，二维码/一维码，需要在包清单管理器勾选摄像头权限。

首先右键项目引用，打开Nuget包管理器搜索安装：ZXing.Net.Mobile

BarcodePage.xmal页面代码

BarcodePage.xmal.cs后台代码

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{    /// 
    /// 可用于自身或导航至 Frame 内部的空白页。    /// 
    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 active            if (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 active            if (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 page            await 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 threads            await 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;            }        }        /// 
        /// 解析二维码图片        /// 
        /// 图片        /// 
             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
     
       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();        }    }}