如何从Web应用程序捕获.NET中的屏幕截图？

Question

在Java中,我们可以这样做:

import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import java.io.File;

...

public void captureScreen(String fileName) throws Exception {

   Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
   Rectangle screenRectangle = new Rectangle(screenSize);
   Robot robot = new Robot();
   BufferedImage image = robot.createScreenCapture(screenRectangle);
   ImageIO.write(image, "png", new File(fileName));

}

...

我们如何通过Web应用程序在.NET中执行此操作？捕获客户端的屏幕并将其从应用程序内部发送到服务器.

Answer 1

.NET图形对象有一个名为CopyFromScreen()的方法,它将捕获屏幕的矩形区域并将其复制到位图中.最好的方法类似于以下内容:

public void CaptureImage(Point SourcePoint, Point DestinationPoint, Rectangle Selection, string FilePath)
{
    using (Bitmap bitmap = new Bitmap(Selection.Width, Selection.Height)) {
        using (Graphics g = Graphics.FromImage(bitmap)) {
            g.CopyFromScreen(SourcePoint,DestinationPoint, Selection.Size);
        }
        bitmap.Save(FilePath, ImageFormat.Bmp);
    }
}