1         /// <summary>
 2         /// 窗体初始化时，枚举所有视频输入设备，并加载到cmbDeviceLists中
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         private void MainFrm_Load(object sender, EventArgs e)
 7         {
 8             try
 9             {
10                 videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
11                 if (videoDevices.Count == 0)
12                     throw new ApplicationException();
13                 foreach (FilterInfo device in videoDevices)
14                 {
15                     cmbDeviceLists.Items.Add(device.Name);
16                 }
17                 cmbDeviceLists.SelectedIndex = 0;
18             }
19             catch (ApplicationException)
20             {
21                 cmbDeviceLists.Items.Add("No local capture devices");
22                 videoDevices = null;
23             }
24         }

 1         /// <summary>
 2         /// 打开相机
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         private void btnOpenCamera_Click(object sender, EventArgs e)
 7         {
 8             VideoCaptureDevice videoSource = new VideoCaptureDevice(videoDevices[cmbDeviceLists.SelectedIndex].MonikerString);
 9             this.videoSourcePlayer.VideoSource = videoSource;
10             this.videoSourcePlayer.Start();
11             this.btnOpenCamera.Enabled = false;
12             this.btnTakePic.Enabled = true;
13             this.btnExit.Enabled = true;
14         }

 1         /// <summary>
 2         /// 拍照
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         private void btnTakePic_Click(object sender, EventArgs e)
 7         {
 8             try
 9             {
10                 if (this.videoSourcePlayer.IsRunning)
11                 {
12                     this.pbImage.Visible = true;
13                     Bitmap bitMap = this.videoSourcePlayer.GetCurrentVideoFrame();
14                     this.pbImage.Image = bitMap;
15                     //设置图片相对控件的大小
16                     this.pbImage.SizeMode = PictureBoxSizeMode.StretchImage;
17                     this.btnSavePic.Enabled = true;
18                 }
19             }
20             catch (Exception ex)
21             {
22                 MessageBox.Show("摄像头异常：" + ex.Message);
23             }
24         }

 1         /// <summary>
 2         /// 保存图片
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         private void btnSavePic_Click(object sender, EventArgs e)
 7         {
 8             BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
 9                                     videoSourcePlayer.GetCurrentVideoFrame().GetHbitmap(),
10                                     IntPtr.Zero,
11                                      Int32Rect.Empty,
12                                     BitmapSizeOptions.FromEmptyOptions());
13             PngBitmapEncoder pE = new PngBitmapEncoder();
14             pE.Frames.Add(BitmapFrame.Create(bitmapSource));
15             string picName = GetImagePath() + "\\" + "Test" + ".bmp";
16             if (File.Exists(picName))
17             {
18                 File.Delete(picName);
19             }
20             using (Stream stream = File.Create(picName))
21             {
22                 pE.Save(stream);
23             }
24             MessageBox.Show("保存成功！根路径Imgs文件夹下！");
25         }

 1         /// <summary>
 2         /// 关闭相机
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         private void btnExit_Click(object sender, EventArgs e)
 7         {
 8             videoSourcePlayer.SignalToStop();
 9             videoSourcePlayer.WaitForStop();
10             this.btnOpenCamera.Enabled = true;
11             this.btnTakePic.Enabled = false;
12             this.btnExit.Enabled = false;
13             this.pbImage.Visible = false;
14         }

1         private void MainFrm_FormClosed(object sender, FormClosedEventArgs e)
2         {
3             videoSourcePlayer.SignalToStop();
4             videoSourcePlayer.WaitForStop();
5         }