Drawing Arcs Using GDI+

An arc is a portion of an ellipse. To draw an arc, you call the DrawArc method of the Graphics class.

Drawing an Arc

To draw an arc, call the DrawArc method of the Graphic object. The parameters of the DrawArc method are the same as the parameters of the DrawEllipse method, except that DrawArc requires a starting angle and sweep angle.

The following is the syntax of the DrawArc method:

The following code example demonstrates how to draw an arc with starting angle 30 degrees and a sweep angle of 180 degrees:

Dim myImage As New Bitmap(300, 300, Imaging.PixelFormat.Format32bppRgb) Dim myGraphics As Graphics = Graphics.FromImage(myImage) myGraphics.Clear(Color.White) Dim myPen As New Pen(Color.Blue, 2) 'draw an arc myGraphics.DrawArc(myPen, 5, 5, 100, 100, 30, 180) myImage.Save(Response.OutputStream, Imaging.ImageFormat.Jpeg)