c# Form 摄像头编程，监控，获取图像

using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; using System.Runtime.InteropServices; using System.Drawing.Imaging; namespace CapTureMovie { /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button BtnCapTure; private System.Windows.Forms.Panel panel_Vedio; private int hHwnd; private System.Windows.Forms.Button BtnStop; private System.Windows.Forms.Label LbSysMsg; private System.Windows.Forms.Button button1; public struct videohdr_tag { public byte[] lpData; public int dwBufferLength; public int dwBytesUsed; public int dwTimeCaptured; public int dwUser; public int dwFlags; public int[] dwReserved; } public delegate bool CallBack(int hwnd, int lParam); /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; [DllImport("avicap32.dll", CharSet=CharSet.Ansi, SetLastError=true, ExactSpelling=true)] public static extern int capCreateCaptureWindowA([MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszWindowName, int dwStyle, int x, int y, int nWidth, short nHeight, int hWndParent, int nID); [DllImport("avicap32.dll", CharSet=CharSet.Ansi, SetLastError=true, ExactSpelling=true)] public static extern bool capGetDriverDescriptionA(short wDriver, [MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszName, int cbName, [MarshalAs(UnmanagedType.VBByRefStr)] ref string lpszVer, int cbVer); [DllImport("user32", CharSet=CharSet.Ansi, SetLastError=true, ExactSpelling=true)] public static extern bool DestroyWindow(int hndw); [DllImport("user32", EntryPoint="SendMessageA", CharSet=CharSet.Ansi, SetLastError=true, ExactSpelling=true)] public static extern int SendMessage(int hwnd, int wMsg, int wParam, [MarshalAs(UnmanagedType.AsAny)] object lParam); [DllImport("user32", CharSet=CharSet.Ansi, SetLastError=true, ExactSpelling=true)] public static extern int SetWindowPos(int hwnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags); [DllImport("vfw32.dll")] public static extern string capVideoStreamCallback(int hwnd,videohdr_tag videohdr_tag); [DllImport("vicap32.dll", CharSet=CharSet.Ansi, SetLastError=true, ExactSpelling=true)] public static extern bool capSetCallbackOnFrame(int hwnd,string s); public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1)); this.panel_Vedio = new System.Windows.Forms.Panel(); this.BtnCapTure = new System.Windows.Forms.Button(); this.BtnStop = new System.Windows.Forms.Button(); this.LbSysMsg = new System.Windows.Forms.Label(); this.button1 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // panel_Vedio // this.panel_Vedio.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("panel_Vedio.BackgroundImage"))); this.panel_Vedio.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D; this.panel_Vedio.Location = new System.Drawing.Point(8, 16); this.panel_Vedio.Name = "panel_Vedio"; this.panel_Vedio.Size = new System.Drawing.Size(288, 224); this.panel_Vedio.TabIndex = 0; // // BtnCapTure // this.BtnCapTure.Location = new System.Drawing.Point(24, 256); this.BtnCapTure.Name = "BtnCapTure"; this.BtnCapTure.TabIndex = 1; this.BtnCapTure.Text = "图象采集"; this.BtnCapTure.Click += new System.EventHandler(this.BtnCapTure_Click); // // BtnStop // this.BtnStop.Enabled = false; this.BtnStop.Location = new System.Drawing.Point(136, 256); this.BtnStop.Name = "BtnStop"; this.BtnStop.TabIndex = 1; this.BtnStop.Text = "停止采集"; this.BtnStop.Click += new System.EventHandler(this.BtnStop_Click); // // LbSysMsg // this.LbSysMsg.Location = new System.Drawing.Point(16, 296); this.LbSysMsg.Name = "LbSysMsg"; this.LbSysMsg.Size = new System.Drawing.Size(240, 23); this.LbSysMsg.TabIndex = 2; // // button1 // this.button1.Location = new System.Drawing.Point(304, 48); this.button1.Name = "button1"; this.button1.TabIndex = 3; this.button1.Text = "button1"; this.button1.Click += new System.EventHandler(this.button1_Click); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(400, 357); this.Controls.Add(this.button1); this.Controls.Add(this.LbSysMsg); this.Controls.Add(this.BtnCapTure); this.Controls.Add(this.panel_Vedio); this.Controls.Add(this.BtnStop); this.Name = "Form1"; this.Text = "Form1"; this.ResumeLayout(false); } #endregion /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } private void BtnCapTure_Click(object sender, System.EventArgs e) { this.OpenCapture(); } private void OpenCapture() { int intWidth=this.panel_Vedio.Width; int intHeight=this.panel_Vedio.Height; int intDevice=0; string refDevice=intDevice.ToString(); hHwnd=Form1.capCreateCaptureWindowA(ref refDevice,1342177280,0,0,640,480,this.panel_Vedio.Handle.ToInt32(),0); this.LbSysMsg.Text=""; this.LbSysMsg.Text+="驱动:"+refDevice; if(Form1.SendMessage(hHwnd,0x40a,intDevice,0)>0) { Form1.SendMessage(this.hHwnd,0x435,-1, 0); Form1.SendMessage(this.hHwnd,0x434,0x42, 0); Form1.SendMessage(this.hHwnd,0x432,-1, 0); Form1.SetWindowPos(this.hHwnd,1,0,0,intWidth,intHeight,6); this.BtnCapTure.Enabled=false; this.BtnStop.Enabled=true; } else { Form1.DestroyWindow(this.hHwnd); this.BtnCapTure.Enabled=false; this.BtnStop.Enabled=true; } } private void BtnStop_Click(object sender, System.EventArgs e) { Form1.SendMessage(this.hHwnd, 0x40b, 0, 0); Form1.DestroyWindow(this.hHwnd); this.BtnCapTure.Enabled=true; this.BtnStop.Enabled=false;