C#WPF使用AForge类库操作USB摄像头拍照并保存

 
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using System;
using System.Windows;

namespace AForgeTest
{
 /// 

 /// MainWindow.xaml 的交互逻辑
 /// 
 public partial class MainWindow : Window
 {
  public MainWindow()
  {
   InitializeComponent();
  }

  private void btnOpenCamera_Click(object sender, EventArgs e)
  {
   CameraHelper.UpdateCameraDevices();
   if (CameraHelper.CameraDevices.Count > 0)
   {
    CameraHelper.SetCameraDevice(0);
   }
  }

  private void btnCapture_Click(object sender, EventArgs e)
  {
   CameraHelper.CaptureImage(@"E:\1");
  }

  private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
  {
   CameraHelper.CloseDevice();
  }
 }
}

using System;
using AForge.Video.DirectShow;
using AForge.Controls;
using System.Windows;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

namespace AForgeTest
{
 public static class CameraHelper
 {
  private static FilterInfoCollection _cameraDevices;
  private static VideoCaptureDevice div = null;
  private static VideoSourcePlayer sourcePlayer = new VideoSourcePlayer();
  private static bool _isDisplay = false;
  //指示_isDisplay设置为true后，是否设置了其他的sourcePlayer，若未设置则_isDisplay重设为false
  private static bool isSet = false;

  /// 

  /// 获取或设置摄像头设备，无设备为null
  /// 
  public static FilterInfoCollection CameraDevices
  {
   get
   {
    return _cameraDevices;
   }
   set
   {
    _cameraDevices = value;
   }
  }
  /// 

  /// 指示是否显示摄像头视频画面
  /// 默认false
  /// 
  public static bool IsDisplay
  {
   get { return _isDisplay; }
   set { _isDisplay = value; }
  }
  /// 

  /// 获取或设置VideoSourcePlayer控件，
  /// 只有当IsDisplay设置为true时，该属性才可以设置成功
  /// 
  public static VideoSourcePlayer SourcePlayer
  {
   get { return sourcePlayer; }
   set
   {
    if (_isDisplay)
    {
     sourcePlayer = value;
     isSet = true;
    }

   }
  }
  /// 

  /// 更新摄像头设备信息
  /// 
  public static void UpdateCameraDevices()
  {
   _cameraDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
  }
  /// 

  /// 设置使用的摄像头设备
  /// 
  /// 设备在CameraDevices中的索引
  /// 
  public static bool SetCameraDevice(int index)
  {
   if (!isSet) _isDisplay = false;
   //无设备，返回false
   if (_cameraDevices.Count <= 0 || index < 0) return false;
   if (index > _cameraDevices.Count - 1) return false;
   // 设定初始视频设备
   div = new VideoCaptureDevice(_cameraDevices[index].MonikerString);
   sourcePlayer.VideoSource = div;
   div.Start();
   sourcePlayer.Start();
   return true;
  }
  /// 

  /// 截取一帧图像并保存
  /// 
  /// 图像保存路径
  /// 保存的图像文件名
  public static void CaptureImage(string filePath, string fileName = null)
  {
   if (sourcePlayer.VideoSource == null) return;
   if (!Directory.Exists(filePath))
   {
    Directory.CreateDirectory(filePath);
   }
   try
   {
    //sourcePlayer.Start();
    Image bitmap = sourcePlayer.GetCurrentVideoFrame();
    if(fileName == null) fileName = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss");
    bitmap.Save(filePath + @"\" + fileName + "-cap.jpg", ImageFormat.Jpeg);
    bitmap.Dispose();
    //sourcePlayer.Stop();
   }
   catch (Exception e)
   {
    MessageBox.Show(e.Message.ToString());
   }
  }
  /// 

  /// 关闭摄像头设备
  /// 
  public static void CloseDevice()
  {
   if (div != null && div.IsRunning)
   {
    sourcePlayer.Stop();
    div.SignalToStop();
    div = null;
    _cameraDevices = null;
   }
  }
 }
}

xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"
xmlns:aforge ="clr-namespace:AForge.Controls;assembly=AForge.Controls"12

/// 

/// 截取一帧图像并保存
/// 
/// 图像保存路径
/// 保存的图像文件名
/// 如果保存成功，则返回完整路径，否则为 null
 public static string CaptureImage(string filePath, string fileName = null)
  {
   if (sourcePlayer.VideoSource == null) return null;
   if (!Directory.Exists(filePath))
   {
    Directory.CreateDirectory(filePath);
   }
   try
   {
    Image bitmap = sourcePlayer.GetCurrentVideoFrame();
    if(fileName == null) fileName = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss");
    string fullPath = Path.Combine(filePath, fileName + "-cap.jpg");
    bitmap.Save(fullPath, ImageFormat.Jpeg);
    bitmap.Dispose();
    return fullPath;
   }
   catch (Exception e)
   {
    MessageBox.Show(e.Message.ToString());
    return null;
   }
}

using System;
using System.Windows;
using System.Windows.Media.Imaging;

namespace AForgeTest
{
 /// 

 /// MainWindow.xaml 的交互逻辑
 /// 
 public partial class MainWindow : Window
 {
  public MainWindow()
  {
   InitializeComponent();
   CameraHelper.IsDisplay = true;
   CameraHelper.SourcePlayer = player;
   CameraHelper.UpdateCameraDevices();
  }

  private void btnOpenCamera_Click(object sender, EventArgs e)
  {
   if (CameraHelper.CameraDevices.Count > 0)
   {
    CameraHelper.SetCameraDevice(0);
   }
  }

  private void btnCapture_Click(object sender, EventArgs e)
  {
   string fullPath = CameraHelper.CaptureImage(AppDomain.CurrentDomain.BaseDirectory + @"\Capture");

   BitmapImage bit = new BitmapImage();
   bit.BeginInit();
   bit.UriSource = new Uri(fullPath);
   bit.EndInit();
   imgCapture.Source = bit;
  }

  private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)
  {
   CameraHelper.CloseDevice();
  }
 }
}