.net创建activex实现摄像头拍照
using System.Reflection; using System.Runtime.CompilerServices; using System.Runtime.InteropServices; // 有关程序集的常规信息通过以下 // 特性集控制。更改这些特性值可修改 // 与程序集关联的信息。 [assembly: AssemblyTitle("TestActiveX")] [assembly: AssemblyDescription("")] [assembly: AssemblyConfiguration("")] [assembly: AssemblyCompany("")] [assembly: AssemblyProduct("TestActiveX")] [assembly: AssemblyCopyright("Copyright © 2014")] [assembly: AssemblyTrademark("")] [assembly: AssemblyCulture("")] // 将 ComVisible 设置为 false 使此程序集中的类型 // 对 COM 组件不可见。如果需要从 COM 访问此程序集中的类型, // 则将该类型上的 ComVisible 特性设置为 true。 [assembly: ComVisible(true)] // 如果此项目向 COM 公开,则下列 GUID 用于类型库的 ID [assembly: Guid("0914bbdc-9ef9-4373-951d-d8c0a2b28348")] [assembly:System.Security.AllowPartiallyTrustedCallers()] // 程序集的版本信息由下面四个值组成: // // 主版本 // 次版本 // 生成号 // 修订号 // // 可以指定所有这些值,也可以使用“生成号”和“修订号”的默认值, // 方法是按如下所示使用“*”: // [assembly: AssemblyVersion("1.0.*")] [assembly: AssemblyVersion("1.0.0.0")] [assembly: AssemblyFileVersion("1.0.0.0")]
using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; namespace TestActiveX { //Guid唯一,不可变更,否则将无法通过IE浏览器的ActiveX控件的安全认证 [ComImport, Guid("CB5BDC81-93C1-11CF-8F20-00805F2CD064")] [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IObjectSafety { [PreserveSig] void GetInterfacceSafyOptions( int riid, out int pdwSupportedOptions, out int pdwEnabledOptions); [PreserveSig] void SetInterfaceSafetyOptions( int riid, int dwOptionsSetMask, int dwEnabledOptions); } }
using System; using System.Collections.Generic; using System.Text; using System.Runtime.InteropServices; namespace TestActiveX { public class WebCam { #region 参数 private 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; private string GrabImagePath = ""; private string KinescopePath = ""; #endregion /// <summary> /// 初始化摄像头 /// </summary> /// <param name="handle">控件的句柄</param> /// <param name="left">开始显示的左边距</param> /// <param name="top">开始显示的上边距</param> /// <param name="width">要显示的宽度</param> /// <param name="height">要显示的长度</param> public WebCam(IntPtr handle, int left, int top, int width, int height) { mControlPtr = handle; mWidth = width; mHeight = height; mLeft = left; mTop = top; } #region "属性设置" /// <summary> /// 视频左边距 /// </summary> public int Left { get { return mLeft; } set { mLeft = value; } } /// <summary> /// 视频上边距 /// </summary> public int Top { get { return mTop; } set { mTop = value; } } /// <summary> /// 视频宽度 /// </summary> public int Width { get { return mWidth; } set { mWidth = value; } } /// <summary> /// 视频高度 /// </summary> public int Height { get { return mHeight; } set { mHeight = value; } } /// <summary> /// 抓图文件存放路径 /// 例:d:\a.bmp /// </summary> public string grabImagePath { get { return GrabImagePath; } set { GrabImagePath = value; } } /// <summary> /// 录像文件存放路径 /// 例:d:\a.avi /// </summary> public string kinescopePath { get { return KinescopePath; } set { KinescopePath = value; } } #endregion [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, long lParam); /// <summary> /// 开始显示图像 /// </summary> public void Start() { if (bStat) return; bStat = true; byte[] lpszName = new byte[100]; 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; } /// <summary> /// 停止显示 /// </summary> public void Stop() { SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); bStat = false; } /// <summary> /// 抓图 /// </summary> public void GrabImage() { IntPtr hBmp = Marshal.StringToHGlobalAnsi(GrabImagePath); SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt64()); } /// <summary> /// 录像 /// </summary> public void Kinescope() { IntPtr hBmp = Marshal.StringToHGlobalAnsi(KinescopePath); SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt64()); SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0); } /// <summary> /// 停止录像 /// </summary> public void StopKinescope() { SendMessage(hWndC, WM_CAP_STOP, 0, 0); } } }
using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace TestActiveX { [Guid("412DE68D-3082-4C67-83FC-DBFBBFA9597B"), ComVisible(true)] public partial class MyActiveXControl : UserControl, IObjectSafety { #region IObjectSafety 成员 用于ActiveX控件安全信任 public void GetInterfacceSafyOptions(int riid, out int pdwSupportedOptions, out int pdwEnabledOptions) { pdwSupportedOptions = 1; pdwEnabledOptions = 2; } public void SetInterfaceSafetyOptions(int riid, int dwOptionsSetMask, int dwEnabledOptions) { throw new NotImplementedException(); } #endregion /// <summary> /// 摄像头驱动对象 /// </summary> public WebCam webCame = null; public MyActiveXControl() { InitializeComponent(); //开启摄像头 start(); } private void start() { //以panel1为容器显示视频内容 webCame = new WebCam(panel1.Handle, 0, 0, this.panel1.Width, this.panel1.Height); webCame.Start(); } /// <summary> /// 开启摄像头 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnStart_Click(object sender, EventArgs e) { webCame.Start(); } /// <summary> /// 停止摄像头 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnStop_Click(object sender, EventArgs e) { webCame.Stop(); } /// <summary> /// 截图 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnSave_Click(object sender, EventArgs e) { saveFileDialog1.Filter = "JPEG图片(*.jpg)|*.jpg"; if (saveFileDialog1.ShowDialog() == DialogResult.OK) { webCame.grabImagePath = saveFileDialog1.FileName; webCame.GrabImage(); } } } }
<html> <title>Powered by 饕餮 www.easyyh.com</title> <head> </head> <body> <div> <object id="yyzq" classid="clsid:412DE68D-3082-4C67-83FC-DBFBBFA9597B" width="523" height="323" > </object> </div> </body> </html>
作者:程序员思想 - 12饕餮21
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