Drawing Lines Using GDI+

To draw lines with GDI+ you need to create a Graphics object and a Pen object. The Graphics object provides the methods that actually do the drawing, and the Pen object stores attributes, such as line color, width, and style.

Drawing a Line

To draw a line, call the DrawLine method of the Graphics object. The Pen object is passed as one of the arguments to the DrawLine method.

Below is the syntax of the DrawLine method:

The following code example demonstrates how to draw a line from the point (4, 6) to the point (100, 6):

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) myGraphics.DrawLine(myPen, 10, 6, 100, 6) myImage.Save(Response.OutputStream, Imaging.ImageFormat.Jpeg)