C# 5.0 Programmer's Reference

364 ❘ CHAPTER 16 Printing
The PrintPage event handler does all the drawing. It starts by setting the Graphics object’s
SmoothingMode property to make drawn shapes smoother. (Download the example, and comment
this out to see what the difference is.)
Drawing Details
The SmoothingMode values and many other useful values for specifying graphics
characteristics such as dash style and join style are defined in the System.Drawing
.Drawing2D namespace. In a program in which you do a lot of drawing, you will
probably want to include the following directive.
using System.Drawing.Drawing2D;
Next, the program draws an orange rectangle showing the page’s margin bounds. Normally, anything
you draw should be inside the margin bounds. (Don’t worry too much yet about how to draw
shapes. The following sections explain drawing basics.)
Depending on the page number, the code then draws a triangle, diamond, or ellipse. The event
handler finishes by incrementing NextPage and setting e.HasMorePages to true if the next page
has a number less than or equal to 2.
Out of Bounds
The e.MarginBounds value tells you where you should print to leave a reasonable
margin around the edges of the page, but most printers can print outside of those
bounds.
The e.PageBounds value gives the size of the paper, but most printers cannot print
all the way up to the edges of the paper.
The e.PageSettings.PrintableArea value gives the area on which the printer
should print, at least in theory.
All three of these areas are measured in hundredths of inches.
The following table shows the values for my printer.
Value X Y Width Height
e.MarginBounds 100 100 650 900
e.PageBounds 0 0 850 1100
e.PageSettings
.PrintableArea
25 6.833333 800 1042.667
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