.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
出处：https://www.cnblogs.com/12taotie21
本文版权归作者和博客园共有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。如有问题或建议，请多多赐教，非常感谢。
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