网上找了很多代码，都比较零散，以下代码纯自己手写，经过测试。下面有链接，下载后可以直接使用。

介绍：

自动识别：点击Start按钮会调用PC摄像头，代码内置Timer，会每100毫秒识别一下当前摄像头图像中的图像，并调用条码识别功能判定是否有条码，如果有的话就直接停止，否则继循环识别。

截图：也可以手动截图，截图后存在运行目录，请自行查找。

补充：识别通过率取决于摄像头的像素，我的笔记本比较烂，所以通过率不高。高像素的摄像头通过率很高。

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using AForge;

using AForge.Controls;

using AForge.Imaging;

using AForge.Video;

using AForge.Video.DirectShow;

using System.Drawing.Imaging;

using ZXing;

using ZXing.Common;

using ZXing.QrCode;

using ZXing.QrCode.Internal;

/// <summary>

/// 20190515 by hanfre

/// 关于原理：

/// C#调用摄像头+存储图片+Zxing/Zbar图片识别.当开启摄像头的时候利用Timer对当前图片进行解析处理，识别条码；

/// 关于条码解析：

/// 这个DEMO含两个条码解析组件，分别是Zxing和Zbar，使用哪个可以自己切换；

/// 关于作者：

/// Hanfre

/// </summary>

namespace WindowsFormsApplication1

{

    /// <summary>

    /// 20190515 by hanfre

    /// </summary>

    public partial class Form1 : Form

    {

        #region 全局变量定义

        FilterInfoCollection videoDevices;

        VideoCaptureDevice videoSource;

        public int selectedDeviceIndex = 0;

        #endregion

        public Form1()

        {

            InitializeComponent();

            InitializeView();

        }

        #region 事件

        /// <summary>

        /// 启动

        /// 20190515 by hanfre

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void BtnStart_Click(object sender, EventArgs e)

        {

            PbxScanner.Image = null;

            videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

            selectedDeviceIndex = 0;

            videoSource = new VideoCaptureDevice(videoDevices[selectedDeviceIndex].MonikerString);//连接摄像头

            videoSource.NewFrame += new NewFrameEventHandler(VspContainerClone);//捕获画面事件

            videoSource.VideoResolution = videoSource.VideoCapabilities[selectedDeviceIndex];

            VspContainer.VideoSource = videoSource;

            VspContainer.Start();

            StartVideoSource();

        }

        /// <summary>

        /// 停止

        /// 20190515 by hanfre

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void BtnStop_Click(object sender, EventArgs e)

        {

            CloseVideoSource();

        }

        /// <summary>

        /// 保存

        /// 20190515 by hanfre

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void BtnScanner_Click(object sender, EventArgs e)

        {

            if (videoSource == null)

                return;

            Bitmap bitmap = VspContainer.GetCurrentVideoFrame();

            string fileName = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss-ff") + ".jpg";

            bitmap.Save(Application.StartupPath + "\\" + fileName, ImageFormat.Jpeg);

            bitmap.Dispose();

        }

        /// <summary>

        /// 同步事件

        /// 20190515 by hanfre

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="eventArgs"></param>

        private void VspContainerClone(object sender, NewFrameEventArgs eventArgs)

        {

            PbxScanner.Image = (Bitmap)eventArgs.Frame.Clone();

        }

        /// <summary>

        /// Timer定时器

        /// 20190515 by hanfre

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        private void TmScanner_Tick(object sender, EventArgs e)

        {

            if (PbxScanner.Image != null)

            {

                TmScanner.Enabled = false;

                Bitmap img = (Bitmap)PbxScanner.Image.Clone();

                if (DecodeByZxing(img))

                ///if (DecodeByZbar(img))

                {

                    CloseVideoSource();

                }

                else

                {

                    TmScanner.Enabled = true;

                }

            }

        }

        #endregion

        #region 方法

        /// <summary>

        /// 初始化

        /// 20190515 by hanfre

        /// </summary>

        private void InitializeView()

        {

            BtnScanner.Enabled = false;

            BtnStop.Enabled = false;

        }

        /// <summary>

        /// 启动

        /// 20190515 by hanfre

        /// </summary>

        private void StartVideoSource()

        {

            TmScanner.Enabled = true;

            BtnStart.Enabled = false;

            BtnStop.Enabled = true;

            BtnScanner.Enabled = true;

        }

        /// <summary>

        /// 关闭

        /// 20190515 by hanfre

        /// </summary>

        private void CloseVideoSource()

        {

            if (!(videoSource == null))

            {

                if (videoSource.IsRunning)

                {

                    videoSource.SignalToStop();

                    videoSource = null;

                }

            }

            VspContainer.SignalToStop();

            //videoSourcePlayer1.Stop();

            //videoSourcePlayer1.Dispose();

            TmScanner.Enabled = false;

            BtnScanner.Enabled = false;

            BtnStart.Enabled = true;

            BtnStop.Enabled = false;

        }

        #endregion

        #region 方法/Zxing&Zbar

        /// <summary>

        /// 解码

        /// 20190515 by hanfre

        /// </summary>

        /// <param name="b"></param>

        /// <returns></returns>

        private bool DecodeByZxing(Bitmap b)

        {

            try

            {

                BarcodeReader reader = new BarcodeReader();

                reader.AutoRotate = true;

                Result result = reader.Decode(b);

                TxtScannerCode.Text = result.Text;

            }

            catch (Exception e)

            {

                System.Console.WriteLine(e.Message);

                TxtScannerCode.Text = "";

                return false;

            }

            return true;

        }

        private bool DecodeByZbar(Bitmap b)

        {

            DateTime now = DateTime.Now;

            Bitmap pImg = ZbarMakeGrayscale3(b);

            using (ZBar.ImageScanner scanner = new ZBar.ImageScanner())

            {

                scanner.SetConfiguration(ZBar.SymbolType.None, ZBar.Config.Enable, 0);

                scanner.SetConfiguration(ZBar.SymbolType.CODE39, ZBar.Config.Enable, 1);

                scanner.SetConfiguration(ZBar.SymbolType.CODE128, ZBar.Config.Enable, 1);

                List<ZBar.Symbol> symbols = new List<ZBar.Symbol>();

                symbols = scanner.Scan((System.Drawing.Image)pImg);

                if (symbols != null && symbols.Count > 0)

                {

                    string result = string.Empty;

                    symbols.ForEach(s => result += "条码内容:" + s.Data + " 条码质量:" + s.Quality + Environment.NewLine);

                    MessageBox.Show(result);

                    return true;

                }

                else

                {

                    return false;

                }

            }

        }

        /// <summary>

        /// 处理图片灰度

        /// </summary>

        /// <param name="original"></param>

        /// <returns></returns>

        public static Bitmap ZbarMakeGrayscale3(Bitmap original)

        {

            //create a blank bitmap the same size as original

            Bitmap newBitmap = new Bitmap(original.Width, original.Height);

            //get a graphics object from the new image

            Graphics g = Graphics.FromImage(newBitmap);

            //create the grayscale ColorMatrix

            System.Drawing.Imaging.ColorMatrix colorMatrix = new System.Drawing.Imaging.ColorMatrix(

               new float[][]

              {

                 new float[] {.3f, .3f, .3f, 0, 0},

                 new float[] {.59f, .59f, .59f, 0, 0},

                 new float[] {.11f, .11f, .11f, 0, 0},

                 new float[] {0, 0, 0, 1, 0},

                 new float[] {0, 0, 0, 0, 1}

              });

            //create some image attributes

            ImageAttributes attributes = new ImageAttributes();

            //set the color matrix attribute

            attributes.SetColorMatrix(colorMatrix);

            //draw the original image on the new image

            //using the grayscale color matrix

            g.DrawImage(original, new Rectangle(0, 0, original.Width, original.Height),

               0, 0, original.Width, original.Height, GraphicsUnit.Pixel, attributes);

            //dispose the Graphics object

            g.Dispose();

            return newBitmap;

        }

        #endregion

    }

}

　　下载地址我已上传到CSDN，可以访问   https://download.csdn.net/download/fandoc/11180026  下载

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