CODEWITHSUNDEEP
c#bitmap
Raggaer
Raggaer

Reputation: 3318

element rectangle

I'm trying to copy from the screen the position of a PictureBox. My code looks like this:

Form1.cs:

_recorder = new ScreenRecord();
_recorder.StartRecording(
   pictureBox1,
   pictureBox1.RectangleToScreen(new Rectangle())
);

ScreenRecord.cs:

class ScreenRecord
{
   private ScreenBitmap scBitmap;

   public void StartRecording(PictureBox cam, Rectangle rect)
   {
      scBitmap = new ScreenBitmap(cam, rect);
      cam.Image = scBitmap.GetBitmap();
   }
}

ScreenBitmap.cs:

class ScreenBitmap
{
   private PictureBox camBox;
   private Rectangle camLocation;

   public ScreenBitmap(PictureBox cam, Rectangle rect)
   {
      camBox = cam;
      camLocation = rect;
   }

   public Bitmap GetBitmap()
   {
      Bitmap screenBitmap = GetScreen();
      return screenBitmap;
   }

   private Bitmap GetScreen()
   {
      Bitmap scBitmap = new Bitmap(camBox.Width, camBox.Height);
      Graphics g = Graphics.FromImage(scBitmap);

      g.CopyFromScreen(
         camLocation.X,
         camLocation.Y,
         0,
         0,
         new Size(camBox.Width, camBox.Height)
      );

      return scBitmap;
   }
}

I'm getting the pictureBox1 rectangle and then copying from the screen, but it looks like its not working. If I try the following code:

g.CopyFromScreen(
   camLocation.X,
   121,
   0,
   0,
   new Size(camBox.Width, camBox.Height)
);

where 121 is a random number it works (I get an image, not the part I want, but it works) so the Y coordinate of the rectangle may be wrong? Or I'm missing something...

Upvotes: 2

Views: 97

Answers (1)

terrybozzio
terrybozzio

Reputation: 4542

This will get you what is behind the PictureBox, with the opacity trick. The rest you can easily transfer to your code: 

 //just when you are about to capture screen take opacity and later restore it.
 this.Opacity = 0.0;
 Point first = PointToScreen(pictureBox1.Location);

 Bitmap bit = new Bitmap(pictureBox1.Width, pictureBox1.Height);
 Graphics g = Graphics.FromImage(bit);

 g.CopyFromScreen(first.X,first.Y, 0, 0, pictureBox1.Size);
 this.Opacity = 1.0;
 pictureBox1.Image = bit;

You can test this code by creating a new WinForms project, add a Button and a PictureBox, and place this code in the Button's Click event handler.

Upvotes: 1

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