[C#/Winform] Screen Capture

Winform 에서 Screen Capture 하는 방법입니다.

using System.Drawing.Imaging;

namespace ScreenCaptureTest
{
    public class ScreenCapture
    {
        public static void Capture(string outputFilename)
        {
            // Capture 할 모니터
            Rectangle rect = Screen.PrimaryScreen.Bounds;
            // 2nd screen = Screen.AllScreens[1]

            // 픽셀 포맷 정보
            int bitsPerPixel = Screen.PrimaryScreen.BitsPerPixel;
            PixelFormat pixelFormat = PixelFormat.Format32bppArgb;
            if (bitsPerPixel <= 16)
            {
                pixelFormat = PixelFormat.Format16bppRgb565;
            }
            if (bitsPerPixel == 24)
            {
                pixelFormat = PixelFormat.Format24bppRgb;
            }

            Bitmap bmp = new Bitmap(rect.Width, rect.Height, pixelFormat);

            using (Graphics gr = Graphics.FromImage(bmp))
            {
                gr.CopyFromScreen(rect.Left, rect.Top, 0, 0, rect.Size);
            }

            // Bitmap 을 이미지 파일로 저장
            bmp.Save(outputFilename);
            bmp.Dispose();
        }
    }
}

사용

namespace ScreenCaptureTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void captureButton_Click(object sender, EventArgs e)
        {
            ScreenCapture.Capture("test.png");
        }
    }
}

결과