C#调用电脑摄像头拍照

1.打开VS，新建一个Form窗体，工具->NuGet包管理工具->管理解决方案的NuGet包，在浏览里搜索AForge.Controls、AForge.Video.DirectShow，安装AForge.Controls和AForge.Video.DirectShow

2.安装AForge组件完成后，VS工具箱会新增AForge控件，把AForge.NET中的VideoSourcePlayer拖到Form窗体上

 

 3.关键代码

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#region 变量 /// <summary> /// 摄像头设备集合 /// </summary> FilterInfoCollection videoDevices;   /// <summary> /// 捕获设备资源 /// </summary> VideoCaptureDevice videoSource;   /// <summary> /// 处理图片 /// </summary> Bitmap bitImg; #endregion     /// <summary> /// 先检测摄像头 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Form1_Load(object sender, EventArgs e) {     //检测电脑所有的摄像头     videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);     MessageBox.Show("检测到了【" + videoDevices.Count.ToString() + "】个摄像头");       //获取需要拍照的设备     videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString);     videoSourcePlayer1.VideoSource = videoSource;       //启动摄像头     videoSourcePlayer1.Start(); }   /// <summary> /// 拍照 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) {     //拍摄并获取图片     bitImg = videoSourcePlayer1.GetCurrentVideoFrame(); }     /// <summary> /// 关闭摄像头 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button2_Click(object sender, EventArgs e) {     ShutCamera(); }   /// <summary> /// 关闭并释放摄像头 /// </summary> public void ShutCamera() {     if (videoSourcePlayer1.VideoSource != null)     {         videoSourcePlayer1.SignalToStop();         videoSourcePlayer1.WaitForStop();         videoSourcePlayer1.VideoSource = null;     } }