Keeping a PictureBox centered inside a container

Question

I am designing a simple picture viewer with ability to do some basic image processing. At the moment I have the problem of keeping the PictureBox centered insid

Answer 1

Givien a Form with TabControl, which has Dock set to Fill, below will keep your PictureBox in the centre. It also sets PictureBox size to Bitmap size:

    public partial class Form1 : Form
    {
        Bitmap b = new Bitmap(320, 200);
        public Form1()
        {
            InitializeComponent();
            CenterTheBox();
        }

        private void Form1_Resize(object sender, EventArgs e)
        {
            CenterTheBox();
        }

        void CenterTheBox()
        {
            pictureBox1.Size = b.Size;
            var left = (tabPage1.ClientRectangle.Width - pictureBox1.ClientRectangle.Width) / 2;
            var top = (tabPage1.ClientRectangle.Height - pictureBox1.ClientRectangle.Height) / 2;
            pictureBox1.Location = new Point(tabPage1.ClientRectangle.Location.X + left, tabPage1.ClientRectangle.Location.Y + top);

        }
    }