C# 启动Windows摄像头类 使用Aforge.net

    /// <summary>    /// 启动摄像头类  需要引用using AForge.Video; using AForge.Video.DirectShow;    /// </summary>    public class Video    {        ///---声明变量          private FilterInfoCollection USE_Webcams = null;        private VideoCaptureDevice Camera = null;        public event EventHandler<EventArgs> Realtime_Img_Generation;        public Video()        {            ///---实例化对象              USE_Webcams = new FilterInfoCollection(FilterCategory.VideoInputDevice);            ///---摄像头数量大于0              if (USE_Webcams.Count > 0)            {                ///---实例化对象                  Camera = new VideoCaptureDevice(USE_Webcams[0].MonikerString);                ///---绑定事件                  Camera.NewFrame += new NewFrameEventHandler(Cam_NewFrame);            }        }        [System.Runtime.InteropServices.DllImport("gdi32.dll")]        private static extern bool DeleteObject(IntPtr hObject);        private void Cam_NewFrame(object obj, NewFrameEventArgs eventArgs)        {            try            {                System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() =>                {                    var frame = eventArgs.Frame.Clone() as Bitmap;                    ///---throw new NotImplementedException();                      IntPtr ptr = frame.GetHbitmap();                    BitmapSource bitmapImage = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(ptr, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions());                    //release resource                      DeleteObject(ptr);                    frame.Dispose();                    OnRealtime_Img_Generation(eventArgs, bitmapImage);                }));            }            catch (Exception ex)            {                return;            }        }        private void OnRealtime_Img_Generation(EventArgs e, BitmapSource bitMap)        {            EventHandler<EventArgs> handler = Realtime_Img_Generation;            if (handler != null)                handler(bitMap, e);        }        public void StartCamera()        {            Task.Factory.StartNew(() =>            {                if (Camera != null)                {                    Camera.Start();                }            });        }        public void StopCamera()        {            Task.Factory.StartNew(() =>            {                if (Camera != null)                {                    Camera.Stop();                }            });        }    }

用法示例

private void Window_Loaded(object sender, RoutedEventArgs e)        {            video = new Video();            video.StartCamera();            video.Realtime_Img_Generation += Video_Realtime_Img_Generation;        }        private void Video_Realtime_Img_Generation(object sender, EventArgs e)        {            System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() =>            {                var bitmap = sender as BitmapSource;                img.Source = bitmap;            }));        }