C#调用摄像头拍摄,截图,视频.docx

C#调用摄像头拍摄，截图，视频 (2013-01-29 14:35:43)分类：C#cs类：using System.Runtime.InteropServices;using System.Drawing.Imaging;namespace WindowsFormsApplication2class Pickprivate const int WM_USER = 0x400;private const int WS_CHILD = 0x40000000;private const int WS_VISIBLE = 0x10000000;private const int WM_CAP_START = WM_USER;private const int WM_CAP_STOP = WM_CAP_START + 68;private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;private const int WM_CAP_SAVEDIB = WM_CAP_START + 25;private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60;private const int WM_CAP_SEQUENCE = WM_CAP_START + 62;private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;private const int WM_CAP_SEQUENCE_NOFILE = WM_CAP_START + 63;private const int WM_CAP_SET_OVERLAY = WM_CAP_START + 51;private const int WM_CAP_SET_PREVIEW = WM_CAP_START + 50;private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START + 6;private const int WM_CAP_SET_CALLBACK_ERROR = WM_CAP_START + 2;private const int WM_CAP_SET_CALLBACK_STATUSA = WM_CAP_START + 3;private const int WM_CAP_SET_CALLBACK_FRAME = WM_CAP_START + 5;private const int WM_CAP_SET_SCALE = WM_CAP_START + 53;private const int WM_CAP_SET_PREVIEWRATE = WM_CAP_START + 52;private IntPtr hWndC;private bool bStat = false;private IntPtr mControlPtr;private int mWidth;private int mHeight;private int mLeft;private int mTop;/ / 初始化摄像头 / / 控件的句柄 / 开始显示的左边距 / 开始显示的上边距 / 要显示的宽度 / 要显示的长度 public Pick(IntPtr handle, int left, int top, int width, int height)mControlPtr = handle;mWidth = width;mHeight = height;mLeft = left;mTop = top;DllImport(avicap32.dll)private static extern IntPtr capCreateCaptureWindowA(byte lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);DllImport(avicap32.dll)private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize);DllImport(User32.dll)private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);/ / 开始显示图像 / public void Start()if (bStat)return;bStat = true;byte lpszName = new byte100;hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD | WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, 0);if (hWndC.ToInt32() != 0)SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0);SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0);SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0);SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0);SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0);SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0);SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0);return;/ / 停止显示 / public void Stop()SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);bStat = false;/ / 抓图 / / 要保存bmp文件的路径 public void GrabImage(string path)/ public void GrabImage( ) IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt32();/ / 录像 / / 要保存avi文件的路径 public void Kinescope(string path)IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt32();SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0);/ / 停止录像 / public void StopKinescope()SendMessage(hWndC, WM_CAP_STOP, 0, 0); aspx：namespace WindowsFormsApplication2public partial class Form1 : FormPick pick;public Form1()InitializeComponent();private void button1_Click(object sender, EventArgs e) /启动摄像头pick = new Pick(panel1.Handle, 0, 0, panel1.Width, panel1.Height);pick.Start();pictureBox1.ImageLocation = null; /清空pictureBox1private void button2_Click(object sender, EventArgs e) /停止摄像头pick.Stop();private void button3_Click(object sender, EventArgs e) /退出界面if (MessageBox.Show(退出本系统?, 提示, MessageBoxButtons.OKCancel, MessageBoxIcon.Question) = DialogResult.OK)Application.Exit();private void button4_Click(object sender, EventArgs e) /保存截图string path;SaveFileDialog sdf1 = new SaveFileDialog();sdf1.Filter = 图片*.bmp;*.jpg;.j