Question

I’m trying to select an area of an image I’ve selected using openfiledialog
The area I’m trying to select is 16×16 from x,y coordinates 5,5
Once selected I want to draw the 16×16 image into another pictureBox at coordinates 0,0

This is the code I’ve got but I can’t get it to select the correct part of the original image, anybody any suggestions as to why it doesn’t work?

DialogResult result = openFileDialog1.ShowDialog();
if (result == DialogResult.OK) // Test result.
{
    Image origImage = Image.FromFile(openFileDialog1.FileName);
    pictureBoxSkin.Image = origImage;
    lblOriginalFilename.Text = openFileDialog1.SafeFileName;

    System.Drawing.Bitmap bmp = new Bitmap(16, 16);
    Graphics g3 = Graphics.FromImage(bmp);
    g3.DrawImageUnscaled(origImage, 0, 0, 16, 16);

    Graphics g2 = pictureBoxNew.CreateGraphics();
    g2.DrawImageUnscaled(bmp, 0, 0, 16, 16);
}

Answer 1

In order to select the correct section, just replace:

g3.DrawImageUnscaled(origImage, 0, 0, 16, 16);

with

g3.DrawImageUnscaled(origImage, -5, -5, 16, 16);