How to change the border color of a picturebox (winform)?

Question

I want to set the border color/style around the picturebox on and off according to different events.

Are there properties or functions that help me to achieve that aim?

Answer 1

This has always been what I use for that:

To change the border color, call this from the Paint event handler of your Picturebox control:

private void pictureBox1_Paint_1(object sender, PaintEventArgs e)
    {
        ControlPaint.DrawBorder(e.Graphics, pictureBox1.ClientRectangle, Color.Red, ButtonBorderStyle.Solid);
    }

To change the border color dynamically, for instance from a mouseclick event, I use the Tag property of the picturebox to store the color and adjust the Click event of the picturebox to retrieve it from there. For example:

  if (pictureBox1.Tag == null) { pictureBox1.Tag = Color.Red; } //Sets a default color
  ControlPaint.DrawBorder(e.Graphics, pictureBox1.ClientRectangle, (Color)pictureBox1.Tag, ButtonBorderStyle.Solid);

The picturebox Click event, then, would go something like this:

private void pictureBox1_Click(object sender, EventArgs e)
        {
            if ((Color)pictureBox1.Tag == Color.Red) { pictureBox1.Tag = Color.Blue; }
            else {pictureBox1.Tag = Color.Red; }
            pictureBox1.Refresh();
        }

You'll need using System.Drawing; at the beginning and don't forget to call pictureBox1.Refresh() at the end. Enjoy!