如何从屏幕上拍照？

Question

我想编写一个程序，向其他人显示一台 PC 的屏幕......类似于演示系统。如何从当前屏幕拍照？

Answer 1

.NET 通过 Screen (System.Windows.Forms) 类公开此功能。

     // 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