How to use PictureBox OnPaint Event

daming_ocean · March 5th, 2008, 08:53 PM

I want to use PictureBox OnPaint Event to redraw the picturebox.
Just like use Form OnPaint Event to redraw the Form.
I can rewrite Form OnPaint Event in the Form Class,
like this: protected override void OnPaint(PaintEventArgs e).
But I don't know How to rewrite this event in the Form Class.

I really appreciate someone could help me. Thanks very much.

samjudson · March 6th, 2008, 03:44 AM

To overrid the OnPaint method for a PictureBox you would have to create a user control which inherited from PitureBox and override it in that class.

/- Sam Judson : Wrox Technical Editor -/

daming_ocean · March 6th, 2008, 07:41 PM

Thanks a lot. It's really helpful.

robzyc · March 16th, 2008, 06:39 AM

Just as another quick point (although I dont think this is really what you are after in this scenario)...

If you want to do some ad-hoc work, you can just add some logic to the Paint event of the PictureBox control and render stuff over the top of it (since the event is raised following its own rendering). For example:

Code:

        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            // Do some Graphics Work Here
        }

This will be much quicker to implement than creating your own UserControl for one-off items.

Rob
The Developing Developer
Currently Working Towards: MCAD C#
My Blog: http://www.robzyc.spaces.live.com
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daming_ocean · March 24th, 2008, 07:13 PM

Thanks a lot. :D