如何從屏幕上拍照？

Question

我想編寫一個程序，向其他人展示一臺PC的屏幕......像展示系統。我如何從當前屏幕拍照？

Answer 1

.NET通過Screen（System.Windows.Forms）類公開此功能。

 // the surface that we are focusing upon 
    Rectangle rect = new Rectangle(); 

    // capture all screens in Windows 
    foreach (Screen screen in Screen.AllScreens) 
    { 
     // increase the Rectangle to accommodate the bounds of all screens 
     rect = Rectangle.Union(rect, screen.Bounds); 
    } 

    // create a new image that will store the capture 
    Bitmap bitmap = new Bitmap(rect.Width, rect.Height, PixelFormat.Format32bppArgb); 

    using (Graphics g = Graphics.FromImage(bitmap)) 
    { 
     // use GDI+ to copy the contents of the screen into the bitmap 
     g.CopyFromScreen(rect.X, rect.Y, 0, 0, rect.Size, CopyPixelOperation.SourceCopy); 
    } 

    // bitmap now has the screen capture