用C#做Screen Capture程序的代码和运行节目:
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:
- using System ;
- using System.Drawing ;
- using System.Collections ;
- using System.ComponentModel ;
- using System.Windows.Forms ;
- using System.Data ;
- using System.Drawing.Imaging ;
- using System.IO ;
- //导入在程序中使用到的名称空间
- public class Capture : Form
- {
- private System.ComponentModel.Container components = null ;
- private Icon mNetTrayIcon = new Icon ( "Tray.ico" ) ;
- private Bitmap MyImage = null ;
- private NotifyIcon TrayIcon ;
- private ContextMenu notifyiconMnu ;
- public Capture ( )
- {
- //初始化窗体中使用到的组件
- InitializeComponent ( ) ;
- }
- protected override void OnActivated ( EventArgs e )
- {
- this.Hide ( ) ;
- }
- [ System.Runtime.InteropServices.DllImportAttribute ( "gdi32.dll" ) ]
- private static extern bool BitBlt (
- IntPtr hdcDest , //目标设备的句柄
- int nXDest , // 目标对象的左上角的X坐标
- int nYDest , // 目标对象的左上角的X坐标
- int nWidth , // 目标对象的矩形的宽度
- int nHeight , // 目标对象的矩形的长度
- IntPtr hdcSrc , // 源设备的句柄
- int nXSrc , // 源对象的左上角的X坐标
- int nYSrc , // 源对象的左上角的X坐标
- System.Int32 dwRop // 光栅的操作值
- ) ;
- [ System.Runtime.InteropServices.DllImportAttribute ( "gdi32.dll" ) ]
- private static extern IntPtr CreateDC (
- string lpszDriver , // 驱动名称
- string lpszDevice , // 设备名称
- string lpszOutput , // 无用,可以设定位"NULL"
- IntPtr lpInitData // 任意的打印机数据
- ) ;
- public void capture ( object sender , System.EventArgs e )
- {
- this.Visible = false ;
- IntPtr dc1 = CreateDC ( "DISPLAY" , null , null , ( IntPtr ) null ) ;
- //创建显示器的DC
- Graphics g1 = Graphics.FromHdc ( dc1 ) ;
- //由一个指定设备的句柄创建一个新的Graphics对象
- MyImage = new Bitmap ( 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
- Graphics g2 = Graphics.FromImage ( MyImage ) ;
- //获得屏幕的句柄
- IntPtr dc3 = g1.GetHdc ( ) ;
- //获得位图的句柄
- IntPtr dc2 = 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 ;
- }
- public void ExitSelect ( object sender , System.EventArgs e )
- {
- //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
- public override void Dispose ( )
- {
- base.Dispose ( ) ;
- if ( components != null )
- components.Dispose ( ) ;
- }
- private void InitializeComponent ( )
- {
- //设定托盘程序的各个属性
- TrayIcon = new NotifyIcon ( ) ;
- TrayIcon.Icon = mNetTrayIcon ;
- TrayIcon.Text = "用C#做Screen Capture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 = new MenuItem [ 3 ] ;
- mnuItms [ 0 ] = new MenuItem ( ) ;
- mnuItms [ 0 ] .Text = "捕获当前屏幕!" ;
- mnuItms [ 0 ] .Click += new System.EventHandler ( this.capture ) ;
- mnuItms [ 1 ] = new MenuItem ( "-" ) ;
- mnuItms [ 2 ] = new MenuItem ( ) ;
- mnuItms [ 2 ] .Text = "退出系统" ;
- mnuItms [ 2 ] .Click += new System.EventHandler ( this.ExitSelect ) ;
- mnuItms [ 2 ] .DefaultItem = true ;
- notifyiconMnu = new ContextMenu ( mnuItms ) ;
- TrayIcon.ContextMenu = notifyiconMnu ;
- //为托盘程序加入设定好的ContextMenu对象
- this.SuspendLayout ( ) ;
- this.AutoScaleBaseSize = new System.Drawing.Size ( 5 , 13 ) ;
- this.ClientSize = new System.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Screen Capture程序!" ;
- this.ResumeLayout ( false ) ;
- }
- static void Main ( )
- {
- Application.Run ( new Capture ( ) ) ;
- }
- }
以上介绍C#做Screen Capture程序
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