Question

I have created a User Control using graphic’s fill property. It’s a circle. It’s like a speedometer hence it has many colors and filled using different shapes. I need to have it’s empty space to have back color to some thing other than the default color. How to change the back color of the graphic’s shape???

Answer 1

Check out Pens, Brushes and Colors

Graphics g = this.CreateGraphics();
SolidBrush myBrush = new SolidBrush(Color.Red);
g.FillEllipse(myBrush, ClientRectangle);

A more complete example. This will fill the background of the UserControl (based on the size of the user control) to Pink, and create a small circle that is filled with an orange backgroung color.

  protected override void OnPaint(PaintEventArgs e)
  {
     Graphics g = e.Graphics;

     SolidBrush sb = new SolidBrush(Color.Pink);
     g.FillRectangle(sb, e.ClipRectangle);
     sb.Dispose();

     sb = new SolidBrush(Color.Orange);
     g.FillEllipse(sb, 20, 20, 20, 20);
     sb.Dispose();
  }

Is this more what you are looking for?

If you want the background color to be the same as the user control, change this:

SolidBrush sb = new SolidBrush(this.BackColor); //Color.Pink);