C#中如何实现摄像功能，并显示图像

Question

大家帮帮忙吧！用什么控件，怎么实现呢？？？

Answer 1

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace Ex13_08
{
    public partial class Form1 : Form
    {
        
        public Form1()
        {
            InitializeComponent();
        }
        //声明视频类
        cVideo video;        private void button1_Click(object sender, EventArgs e)
        {
            btnPlay.Enabled = false;
            btnStop.Enabled = true;
            btnPz.Enabled = true;
            video = new cVideo(pictureBox1.Handle, pictureBox1.Width, pictureBox1.Height);
            video.StartWebCam();
        }        private void Form1_Load(object sender, EventArgs e)
        {
            btnPlay.Enabled = false;
            btnStop.Enabled = true;
            btnPz.Enabled = true;
            video = new cVideo(pictureBox1.Handle, pictureBox1.Width, pictureBox1.Height);
            video.StartWebCam();
        }        private void b_stop_Click(object sender, EventArgs e)
        {
            btnPlay.Enabled = true;
            btnStop.Enabled = false;
            btnPz.Enabled = false;
            video.CloseWebcam();
        }        private void btnPz_Click(object sender, EventArgs e)
        {
            video.GrabImage(pictureBox1.Handle, "d:\\a.bmp");
        }        private void btnExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}

Answer 2

四个button 打开视频，关闭视频，拍摄照片，退出

Answer 3

请问LS，cVideo类是哪里来的
没有找到

Answer 4

如下：
using System;
using System.Collections.Generic;
using System.Text;using System.Runtime.InteropServices;
using System.Drawing.Design
;namespace Ex13_08
{
    public class VideoAPI  //视频API类
    {
        //  视频ＡＰＩ调用
        [DllImport("avicap32.dll")]
        public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);
        [DllImport("avicap32.dll")]
        public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer);
        [DllImport("User32.dll")]
        public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int lParam);
        [DllImport("User32.dll")]
        public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, int lParam);        //  常量
        public const int WM_USER = 0x400;
        public const int WS_CHILD = 0x40000000;
        public const int WS_VISIBLE = 0x10000000;
        public const int SWP_NOMOVE = 0x2;
        public const int SWP_NOZORDER = 0x4;
        public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10;
        public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11;
        public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5;
        public const int WM_CAP_SET_PREVIEW = WM_USER + 50;
        public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52;
        public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45;
        public const int WM_CAP_START = WM_USER;
        public const int WM_CAP_SAVEDIB = WM_CAP_START + 25;
    }
    
    public class cVideo     //视频类
    {
        private IntPtr lwndC;       //保存无符号句柄
        private IntPtr mControlPtr; //保存管理指示器
        private int mWidth;
        private int mHeight;        public cVideo(IntPtr handle, int width, int height)
        {
            mControlPtr = handle; //显示视频控件的句柄
            mWidth = width;      //视频宽度
            mHeight = height;    //视频高度
        }
        /// <summary>
        /// 打开视频设备
        /// </summary>
        public void StartWebCam()
        {
            byte[] lpszName = new byte[100];
            byte[] lpszVer = new byte[100];            VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);
            this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);            if (VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))
            {
                VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100, 0);
                VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0);
            }
        }
        /// <summary>
        /// 关闭视频设备
        /// </summary>
        public void CloseWebcam()
        {
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0, 0);
        }        ///   <summary>   
        ///   拍照 
        ///   </summary>   
        ///   <param   name="path">要保存bmp文件的路径</param>   
        public void GrabImage(IntPtr hWndC, string path)
        {
            IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
            VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SAVEDIB, 0, hBmp.ToInt32());
        }  
    }
}

Answer 5

对啊，我也没有 cVideo 类啊  怎么做呢？ help me!!!!

Answer 6

openCV   AForge.NET  都可以

Answer 7

http://download.csdn.net/source/2654937 
这是我以前做的一个局域网QQ聊天软件，里面就包含了视频这个功能，你可以参考一下。