余分な参照を使わないコンソールアプリケーションでスクリーンショットやスクリーン印刷をすることができます

Question

Windows.Formsを呼び出してSendKeysクラスに電話することなく、デスクトップアプリケーションをコンソールアプリケーションでスクリーンショットする方法があるのだろうかと思いました。

私はコンパイラを作成したばかりで、純粋なC＃コンソールアプリケーションをコンパイルできるだけなので、リファレンスを追加するとうまくいかず、See this link (My question with an answer on codeproject)のエラーがスローされ、スクリーンショットを取るコンソールアプリケーションを作成したい私はそれが欲しいときに。

Answer 1

私はこのクラスを使用してスクリーンショットを作成します。このスクリーンショットはあなたに適しているかどうかを確認してください。フォームを参照せず、代わりにSystem.Drawingを使用します。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Drawing; 
using System.Drawing.Imaging; 
using System.Runtime.InteropServices; 

namespace ScreenTest 
{ 
    public class PrintScreen 
    { 
     /// <summary> 
     /// Creates an Image object containing a screen shot of the entire desktop 
     /// </summary> 
     /// <returns></returns> 
     public Image CaptureScreen() 
     { 
      return CaptureWindow(User32.GetDesktopWindow()); 
     } 

     /// <summary> 
     /// Creates an Image object containing a screen shot of a specific window 
     /// </summary> 
     /// <param name="handle">The handle to the window. (In windows forms, this is obtained by the Handle property)</param> 
     /// <returns></returns> 
     public Image CaptureWindow(IntPtr handle) 
     { 
      // get te hDC of the target window 
      IntPtr hdcSrc = User32.GetWindowDC(handle); 
      // get the size 
      User32.RECT windowRect = new User32.RECT(); 
      User32.GetWindowRect(handle, ref windowRect); 
      int width = windowRect.right - windowRect.left; 
      int height = windowRect.bottom - windowRect.top; 
      // create a device context we can copy to 
      IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc); 
      // create a bitmap we can copy it to, 
      // using GetDeviceCaps to get the width/height 
      IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height); 
      // select the bitmap object 
      IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap); 
      // bitblt over 
      GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY); 
      // restore selection 
      GDI32.SelectObject(hdcDest, hOld); 
      // clean up 
      GDI32.DeleteDC(hdcDest); 
      User32.ReleaseDC(handle, hdcSrc); 

      // get a .NET image object for it 
      Image img = Image.FromHbitmap(hBitmap); 
      // free up the Bitmap object 
      GDI32.DeleteObject(hBitmap); 

      return img; 
     } 

     /// <summary> 
     /// Captures a screen shot of a specific window, and saves it to a file 
     /// </summary> 
     /// <param name="handle"></param> 
     /// <param name="filename"></param> 
     /// <param name="format"></param> 
     public void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format) 
     { 
      Image img = CaptureWindow(handle); 
      img.Save(filename, format); 
     } 

     /// <summary> 
     /// Captures a screen shot of the entire desktop, and saves it to a file 
     /// </summary> 
     /// <param name="filename"></param> 
     /// <param name="format"></param> 
     public void CaptureScreenToFile(string filename, ImageFormat format) 
     { 
      Image img = CaptureScreen(); 
      img.Save(filename, format); 
     } 

     /// <summary> 
     /// Helper class containing Gdi32 API functions 
     /// </summary> 
     private class GDI32 
     { 

      public const int SRCCOPY = 0x00CC0020; // BitBlt dwRop parameter 

      [DllImport("gdi32.dll")] 
      public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest, 
       int nWidth, int nHeight, IntPtr hObjectSource, 
       int nXSrc, int nYSrc, int dwRop); 
      [DllImport("gdi32.dll")] 
      public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth, 
       int nHeight); 
      [DllImport("gdi32.dll")] 
      public static extern IntPtr CreateCompatibleDC(IntPtr hDC); 
      [DllImport("gdi32.dll")] 
      public static extern bool DeleteDC(IntPtr hDC); 
      [DllImport("gdi32.dll")] 
      public static extern bool DeleteObject(IntPtr hObject); 
      [DllImport("gdi32.dll")] 
      public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject); 
     } 

     /// <summary> 
     /// Helper class containing User32 API functions 
     /// </summary> 
     private class User32 
     { 
      [StructLayout(LayoutKind.Sequential)] 
      public struct RECT 
      { 
       public int left; 
       public int top; 
       public int right; 
       public int bottom; 
      } 

      [DllImport("user32.dll")] 
      public static extern IntPtr GetDesktopWindow(); 
      [DllImport("user32.dll")] 
      public static extern IntPtr GetWindowDC(IntPtr hWnd); 
      [DllImport("user32.dll")] 
      public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC); 
      [DllImport("user32.dll")] 
      public static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect); 

     } 

} 

ConsoleAppで使用している例です。

using ScreenTest; 
using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.IO; 
using System.Threading.Tasks; 

namespace Screentest 
{ 
    class Program 
    { 
     static DirectoryInfo di; 
     static void Main(string[] args) 
     { 

      args = new string[] { "y" }; 

      if (args[0] == "y") 
      { 

      di = new DirectoryInfo("C:\\ss"); 
      if (!di.Exists){ di.Create(); }      

      PrintScreen ps = new PrintScreen(); 
      ps.CaptureScreenToFile(di + "\\screen.png", System.Drawing.Imaging.ImageFormat.Png); 

      } 


     } 
    } 
}