C# Drawing on Panels

Question

I\'m drawing up a day schedule and representing timeslots with panels, and appointments are yet more panels on top.

The user is able to scroll up and down so that th

Answer 1

You need to call this method from the paint event handler, not just whenever you like. So in your constructor you might have:

panel1.Paint += new PaintEventHandler(panel1_Paint);

and then the implementation:

    private void panel1_Paint( object sender, PaintEventArgs e )
    {
        var p = sender as Panel;
        var g = e.Graphics;

        g.FillRectangle( new SolidBrush( Color.FromArgb( 0, Color.Black ) ), p.DisplayRectangle );

        Point[] points = new Point[4];

        points[0] = new Point( 0, 0 );
        points[1] = new Point( 0, p.Height );
        points[2] = new Point( p.Width, p.Height);
        points[3] = new Point( p.Width, 0 );

        Brush brush = new SolidBrush( Color.DarkGreen );

        g.FillPolygon( brush, points );
    }