.net 实现pc端自动扫描条码，仿超市识别货物码，使用ZBar，zBar比ZXing更好用

仿超市识别二维码或条形码功能，用到的硬件有：摄像头

采用的技术：.net 

用到的控件：zbar

实现过程：1.首页要有个能唤起摄像头的功能

          //用来操作摄像头 
            private VideoCaptureDevice Camera = null;

            //获取摄像头列表
            var devs = new FilterInfoCollection(FilterCategory.VideoInputDevice);

            //实例化设备控制类
            Camera = new VideoCaptureDevice(devs[0].MonikerString);

            //配置录像参数(宽,高,帧率,比特率,等)
            Camera.VideoResolution = Camera.VideoCapabilities[0];

            //设置回调,aforge会不断从这个回调推出图像数据
            Camera.NewFrame += Camera_NewFrame;

            //开始
            Camera.Start();

2摄像头每次抓帧，然后进行解析帧

    private void Camera_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            //写到文件
            //VideoOutPut.WriteVideoFrame(eventArgs.Frame);
            lock (bmp)
            {
                //释放上一个缓存
                bmp.Dispose();
                //保存一份缓存
                bmp = eventArgs.Frame.Clone() as Bitmap;
                // pictureBox1.Refresh();
                //  Action(XmlReadMode=>)
            
                new Thread(() =>
                {
                  
                        Action<string> action = (data) =>
                        {
                          
                            if (bmp != null)
                            {
                              //  var b2 = CopyBitmap(bmp);
                                ScanBarCode2(bmp);
                            }
                            Resh(data);
                        };
                        Invoke(action, "as");
                    
                }).Start();
            }
        }

3.解析帧上的条形码或二维码

/// <summary>
        /// 条码识别
        /// </summary>
        private void ScanBarCode(string fileName)
        {
            DateTime now = DateTime.Now;
            Image primaryImage = Image.FromFile(fileName);

            Bitmap pImg = MakeGrayscale3((Bitmap)primaryImage);
            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);
                scanner.SetConfiguration(ZBar.SymbolType.QRCODE, ZBar.Config.Enable, 1);
                List<ZBar.Symbol> symbols = new List<ZBar.Symbol>();
                symbols = scanner.Scan((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);
                }
            }
        }

4最后看效果