Capturar la pantalla en un mapa de bits

Question

Quiero capturar la pantalla en mi código para obtener una imagen, como usar el botón 'imprimir pantalla' en el teclado.

¿Alguien tiene una idea de cómo hacer esto? No tengo punto de partida

Answer 1

Si el uso del marco .NET 2.0 (o posterior), puede utilizar el método CopyFromScreen() se detalla aquí:

http://www.geekpedia.com/tutorial181_Capturing-screenshots-using-Csharp.html

//Create a new bitmap. 
var bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width, 
           Screen.PrimaryScreen.Bounds.Height, 
           PixelFormat.Format32bppArgb); 

// Create a graphics object from the bitmap. 
var gfxScreenshot = Graphics.FromImage(bmpScreenshot); 

// Take the screenshot from the upper left corner to the right bottom corner. 
gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, 
          Screen.PrimaryScreen.Bounds.Y, 
          0, 
          0, 
          Screen.PrimaryScreen.Bounds.Size, 
          CopyPixelOperation.SourceCopy); 

// Save the screenshot to the specified path that the user has chosen. 
bmpScreenshot.Save("Screenshot.png", ImageFormat.Png); 

Answer 2

// Use this version to capture the full extended desktop (i.e. multiple screens) 

Bitmap screenshot = new Bitmap(SystemInformation.VirtualScreen.Width, 
           SystemInformation.VirtualScreen.Height, 
           PixelFormat.Format32bppArgb); 
Graphics screenGraph = Graphics.FromImage(screenshot); 
screenGraph.CopyFromScreen(SystemInformation.VirtualScreen.X, 
          SystemInformation.VirtualScreen.Y, 
          0, 
          0, 
          SystemInformation.VirtualScreen.Size, 
          CopyPixelOperation.SourceCopy); 

screenshot.Save("Screenshot.png", System.Drawing.Imaging.ImageFormat.Png); 

Answer 3

Trate this código

Bitmap bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height); 
Graphics gr = Graphics.FromImage(bmp); 
gr.CopyFromScreen(0, 0, 0, 0, bmp.Size); 
pictureBox1.Image = bmp; 
bmp.Save("img.png",System.Drawing.Imaging.ImageFormat.Png); 

Answer 4

Bitmap memoryImage; 
//Set full width, height for image 
memoryImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width, 
         Screen.PrimaryScreen.Bounds.Height, 
         PixelFormat.Format32bppArgb); 
Size s = new Size(memoryImage.Width, memoryImage.Height); 
Graphics memoryGraphics = Graphics.FromImage(memoryImage); 
memoryGraphics.CopyFromScreen(0, 0, 0, 0, s); 
string str = ""; 
try 
{ 
    str = string.Format(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + 
      @"\Screenshot.png");//Set folder to save image 
} 
catch { }; 
memoryImage.save(str);