screencapture(怎么用C#做Screen Capture程序)

在掌握了一些C#源代码后,可以得到用C#做Screen Capture程序的源代码(Capture.cs),具体如下:

usingSystem; 
usingSystem.Drawing; 
usingSystem.Collections; 
usingSystem.componentmodel; 
usingSystem.Windows.Forms; 
usingSystem.Data; 
usingSystem.Drawing.Imaging; 
usingSystem.IO; 
//导入在程序中使用到的名称空间 
publicclassCapture:Form 
{ 
privateSystem.ComponentModel.Containercomponents=null; 
privateIconmNetTrayIcon=newIcon("Tray.ico"); 
privateBitmapMyImage=null; 
privatenotifyiconTrayIcon; 
privateContextMenunotifyiconMnu; 
publicCapture() 
{ 
//初始化窗体中使用到的组件 
initializecomponent(); 
} 
protectedoverridevoidOnActivated(EventArgse) 
{ 
this.Hide(); 
} 
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")] 
privatestaticexternboolBitBlt( 
IntPtrhdcDest,//目标设备的句柄 
intnXDest,//目标对象的左上角的X坐标 
intnYDest,//目标对象的左上角的X坐标 
intnWidth,//目标对象的矩形的宽度 
intnHeight,//目标对象的矩形的长度 
IntPtrhdcSrc,//源设备的句柄 
intnXSrc,//源对象的左上角的X坐标 
intnYSrc,//源对象的左上角的X坐标 
System.Int32dwrop//光栅的操作值 
); 
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")] 
privatestaticexternIntPtrcreatedC( 
stringlpszDriver,//驱动名称 
stringlpszDevice,//设备名称 
stringlpszOutput,//无用,可以设定位"NULL" 
IntPtrlpInitData//任意的打印机数据 
); 
publicvoidcapture(objectsender,System.EventArgse) 
{ 
this.Visible=false; 
IntPtrdc1=CreateDC("DISPLAY",null,null,(IntPtr)null); 
//创建显示器的DC 
Graphicsg1=Graphics.FromHdc(dc1); 
//由一个指定设备的句柄创建一个新的Graphics对象 
MyImage=newBitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height,g1); 
//根据屏幕大小创建一个与之相同大小的Bitmap对象 
Graphicsg2=Graphics.FromImage(MyImage); 
//获得屏幕的句柄 
IntPtrdc3=g1.GetHdc(); 
//获得位图的句柄 
IntPtrdc2=g2.GetHdc(); 
//把当前屏幕捕获到位图对象中 
BitBlt(dc2,0,0,Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height,dc3,0,0,13369376); 
//把当前屏幕拷贝到位图中 
g1.ReleaseHdc(dc3); 
//释放屏幕句柄 
g2.ReleaseHdc(dc2); 
//释放位图句柄 
MyImage.Save("c:\\MyJpeg.jpg",ImageFormat.Jpeg); 
MessageBox.Show("已经把当前屏幕保存到C:\\MyJpeg.jpg文件中!"); 
this.Visible=true; 
} 
publicvoidExitSelect(objectsender,System.EventArgse) 
{ 
//隐藏托盘程序中的图标 
TrayIcon.Visible=false; 
//关闭系统 
this.Close(); 
} 
//清除程序中使用过的资源 
publicoverridevoidDispose() 
{ 
base.Dispose(); 
if(components!=null) 
components.Dispose(); 
} 
privatevoidInitializeComponent() 
{ 
//设定托盘程序的各个属性 
TrayIcon=newNotifyIcon(); 
TrayIcon.Icon=mNetTrayIcon; 
TrayIcon.Text="用C#做ScreenCapture程序"; 
TrayIcon.Visible=true; 
//定义一个MenuItem数组,并把此数组同时赋值给ContextMenu对象 
MenuItem[]mnuItms=newMenuItem[3]; 
mnuItms[0]=newMenuItem(); 
mnuItms[0].Text="捕获当前屏幕!"; 
mnuItms[0].Click+=newSystem.EventHandler(this.capture); 
mnuItms[1]=newMenuItem("-"); 
mnuItms[2]=newMenuItem(); 
mnuItms[2].Text="退出系统"; 
mnuItms[2].Click+=newSystem.EventHandler(this.ExitSelect); 
mnuItms[2].DefaultItem=true; 
notifyiconMnu=newContextMenu(mnuItms); 
TrayIcon.ContextMenu=notifyiconMnu; 
//为托盘程序加入设定好的ContextMenu对象 
this.SuspendLayout(); 
this.AutoScaleBaseSize=newSystem.Drawing.Size(5,13); 
this.ClientSize=newSystem.Drawing.Size(320,56); 
this.ControlBox=false; 
this.MaximizeBox=false; 
this.MinimizeBox=false; 
this.WindowState=System.Windows.Forms.FormWindowState.Minimized; 
this.Name="capture"; 
this.ShowInTaskbar=false; 
this.Text="用C#做ScreenCapture程序!"; 
this.ResumeLayout(false); 
} 
staticvoidMain() 
{ 
Application.Run(newCapture()); 
} 
}

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