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C#调用摄像头拍照
在winforn程序中，经常会遇到一些调用硬件的功能，这里给大家讲解的事使用AForge调用摄像头
首先引用用dll文件
这些都是需要应用的dll文件，其中AForge.Controls.dll文件里面封装了一些void控件，在工具箱中应用文件就会出现如下控件
这里会使用到VideoSourcePlayer控件，下面是底层代码
using引用
using System.Drawing.Imaging;
using System.Windows;
using System.IO;
using System.Windows.Media.Imaging;
using AForge;
using AForge.Controls;
using AForge.Video;
using AForge.Video.DirectShow;
private FilterInfoCollection videoDevices; private VideoCaptureDevice videoSource;public FrmOperateCamera() { InitializeComponent(); } /// <summary> /// 窗体加载 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void FrmOperateCamera_Load(object sender, EventArgs e) { try { // 枚举所有视频输入设备 videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); if (videoDevices.Count == 0) throw new ApplicationException(); foreach (FilterInfo device in videoDevices) { tscbxCameras.Items.Add(device.Name); } tscbxCameras.SelectedIndex = 0; } catch (ApplicationException) { tscbxCameras.Items.Add("No local capture devices"); videoDevices = null; } } /// <summary> /// 连接 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnConnect_Click(object sender, EventArgs e) { CameraConn(); } //连接摄像头 private void CameraConn() { VideoCaptureDevice videoSource = new VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString); videoSource.DesiredFrameSize = new System.Drawing.Size(320, 240); videoSource.DesiredFrameRate = 1; videoSourcePlayer.VideoSource = videoSource; videoSourcePlayer.Start(); } /// <summary> /// 关闭 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnClose_Click(object sender, EventArgs e) { videoSourcePlayer.SignalToStop(); videoSourcePlayer.WaitForStop(); } /// <summary> /// 拍照 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Photograph_Click(object sender, EventArgs e) { try { if (videoSourcePlayer.IsRunning) { BitmapSource bitmapSource = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap( videoSourcePlayer.GetCurrentVideoFrame().GetHbitmap(), IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()); PngBitmapEncoder pE = new PngBitmapEncoder(); pE.Frames.Add(BitmapFrame.Create(bitmapSource)); string pa = DateTime.Now.ToString("yyyyMMddHHmmss"); Random rd = new Random(); pa += rd.Next(9); string picName = GetImagePath() + "\\" + pa + ".jpg"; if (File.Exists(picName)) { File.Delete(picName); } using (Stream stream = File.Create(picName)) { pE.Save(stream); } //拍照完成后关摄像头并刷新同时关窗体 if (videoSourcePlayer != null && videoSourcePlayer.IsRunning) { videoSourcePlayer.SignalToStop(); videoSourcePlayer.WaitForStop(); } this.Close(); } } catch (Exception ex) { MessageBox.Show("摄像头异常：" + ex.Message); } } private string GetImagePath() { string personImgPath = Path.GetDirectoryName(AppDomain.CurrentDomain.BaseDirectory) + Path.DirectorySeparatorChar.ToString() + "PersonImg"; if (!Directory.Exists(personImgPath)) { Directory.CreateDirectory(personImgPath); } return personImgPath; }
这里还需要添加一些程序引用，不然还会报错，WIndowsBase，System.Xaml,PresentationCore。
窗体效果如下，显示部分使用的是VideoSourcePlayer控件。
以上就是实际效果。
C#调用摄像头拍照
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