c# 利用AForge.NET组件操作摄像头

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 AForge;

using AForge.Video;

using AForge.Video.DirectShow;

using AForge.Imaging;

using AForge.Imaging.Filters;

using System.IO;

namespace Camera

{

    public partial class Form1 : Form

    {

        private FilterInfoCollection videoDevices;

        public VideoCaptureDevice videoSource;  

        private int flag = 1;

        private string dirc = System.AppDomain.CurrentDomain.BaseDirectory + "JPG"; //截图保存的目录  

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            if (!Directory.Exists(dirc))

                Directory.CreateDirectory(dirc);  

            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()

        {   //你这里重新定义了一个对象，所以出错

            videoSource = new VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString);

            videoSource.DesiredFrameSize = new Size(320, 240);

            videoSource.DesiredFrameRate = 1;

            videPlayer.VideoSource = videoSource;

            videPlayer.Start();

        }

        private void toolStripButton2_Click(object sender, EventArgs e)

        {

            videPlayer.SignalToStop();

            videPlayer.WaitForStop();

        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)

        {

            toolStripButton2_Click(null, null);

        }

        private void toolStripButton3_Click(object sender, EventArgs e)

        {

            //不懂截图,但还是给你简单完善了下

            flag = 0;

            if (videoSource == null)

            {

                MessageBox.Show("请先连接摄像头");                

            }

            else if (!videoSource.IsRunning)

            {

                MessageBox.Show("摄像头已经关闭，请重新打开");

            }

            else

            {

                videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);

            }

        }

        private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)

        {

            Bitmap bitmap = (Bitmap)eventArgs.Frame.Clone();

            if (flag == 0)

            {

                string img = dirc + "/" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg";

                bitmap.Save(img);

                flag = 1;

            }

        } 

    }

}

以上就介绍了C#.NET的相关知识，希望对C#.NET有兴趣的朋友有所帮助。了解更多内容，请关注职坐标编程语言C#.NET频道！