C#利用摄像头拍照功能实现

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Diagnostics;

using AForge;
using AForge.Video;
using AForge.Controls;
using AForge.Video.DirectShow;
using AForge.Video.FFMPEG;
using AForge.Imaging;
using AForge.Imaging.Filters;
using System.IO;
namespace Camera
{
public partial class Form1 : Form
{
private FilterInfoCollection videoDevices;
private VideoCaptureDevice videoSource;
private bool stopREC = true;
private bool createNewFile = true;

private string videoFileFullPath = string.Empty; //视频文件全路径
private string imageFileFullPath = string.Empty; //图像文件全路径
private string videoPath = @"E:\video\"; //视频文件路径

private string videoFileName = string.Empty; //视频文件名
private string imageFileName = string.Empty; //图像文件名
private string drawDate = string.Empty;
private VideoFileWriter videoWriter = null;

public delegate void MyInvoke(); //定义一个委托方法

string g_s_AutoSavePath = AppDomain.CurrentDomain.BaseDirectory + "Capture\\";
object objLock = new object(); //定义一个对象的锁
int frameRate = 20; //默认帧率
private Stopwatch stopWatch = null;
IVideoSource iVideoSource = null;
private int flag = 0;
public Form1()
{
InitializeComponent();
}

private void Form1_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;
}
}

private void toolStripButton1_Click(object sender, EventArgs e)
{
CameraConn();
}

private void CameraConn()
{
videoSource = new VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString);
videoSource.DesiredFrameSize = new Size(320, 240);
videoSource.DesiredFrameRate = 1;

videoPlayer.VideoSource = videoSource;
videoPlayer.Start();
}

private void toolStripButton2_Click(object sender, EventArgs e)
{
videoPlayer.SignalToStop();
videoPlayer.WaitForStop();
}

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
toolStripButton2_Click(null, null);
}

private void button2_Click(object sender, EventArgs e)
{
try
{
flag = 0;
videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);

}
catch (Exception ex)
{
MessageBox.Show("捕获图像失败！" + ex.Message, "提示");
}
}
private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
Bitmap bitmap = (Bitmap)eventArgs.Frame.Clone();
if (flag == 0)
{
string img = "E://img//" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";
bitmap.Save(img);
MessageBox.Show("ok");
flag = 1;
}
}

}
}