1.打开VS2019，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;
}
}
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