Category Archives: drawing

Calculate where a line segment and an ellipse intersect in C#

Posted on August 3, 2017 by Rod Stephens

Finding the intersection between a line segment and an ellipse requires a lot of mathematics. It’s not particularly hard mathematics, but if you’d rather skip it, you can use the following links to jump to the other parts of this … Continue reading →

Posted in algorithms, drawing, geometry, graphics, mathematics | Tagged algorithms, C#, C# programming, drawing, ellipse, ellipse line intersection, ellipse/line intersection, example, example program, geometry, graphics, intersection, line, line ellipse intersection, line segment, line/ellipse intersection, mathematics, Windows Forms programming | 5 Comments

Make transparent button images in C#

Posted on August 2, 2017 by Rod Stephens

It seems like I keep writing this program because I need to make button images fairly often. I wanted to use a simple image with a transparent background for a button image. Unfortunately MSPaint doesn’t know how to save images … Continue reading →

Posted in controls, drawing, graphics | Tagged button, button image, button images, C#, C# programming, controls, drawing, example, example program, graphics, transparent, transparent background, transparent button images, Windows Forms programming | Leave a comment

Draw “marching ants” dashed lines in C#

Posted on July 27, 2017 by Rod Stephens

The example Draw dashed lines that are visible on any background in C# shows how to draw lines that are visible above any backgrounds. If the background is very cluttered, however, it may still be somewhat hard to see the … Continue reading →

Posted in animation, drawing, graphics | Tagged animation, C#, C# programming, dashed lines, dashed rectangles, drawing, DrawRectangle, example, example program, graphics, lines, marching ants, Rectangle, Windows Forms programming | 4 Comments

Draw dashed lines that are visible on any background in C#

Posted on July 26, 2017 by Rod Stephens

This example shows how to draw dashed lines that are visible on any background. Sometimes it’s hard to draw lines that are visible on top of a photo or other complicated background. For example, when the user is clicking and … Continue reading →

Posted in drawing, graphics | Tagged C#, C# programming, dashed lines, dashed rectangles, drawing, DrawRectangle, example, example program, graphics, lines, Rectangle, Windows Forms programming | 1 Comment

Get font size in pixels in C#

Posted on July 21, 2017 by Rod Stephens

One oddity of the Font class is that its Size property returns font size in the units that were used to create the font. The Font class’s Unit property tells you the units used to create the font, but if … Continue reading →

Posted in drawing, fonts, graphics | Tagged AntiAlias, AntiAliasGridFit, C#, C# programming, drawing, example, example program, font size, fonts, graphics, GraphicsPath, smooth text, SmoothingMode, TextRenderingHint, Windows Forms programming | Leave a comment

Draw smooth text in a GraphicsPath in C#

Posted on July 19, 2017 by Rod Stephens

You can set a Graphics object’s TextRenderingHint property to AntiAliasGridFit to draw smooth text. However, if you place text in a GraphicsPath object and draw the GraphicsPath, then the TextRenderingHint property doesn’t give you smooth text. Instead you need to … Continue reading →

Posted in drawing, fonts, graphics | Tagged AntiAlias, AntiAliasGridFit, C#, C# programming, drawing, example, example program, fonts, graphics, GraphicsPath, smooth text, SmoothingMode, TextRenderingHint, Windows Forms programming | 1 Comment

Get the screen’s resolution in C#

Posted on July 12, 2017 by Rod Stephens

Normally a monitor displays 96 logical (or “notional”) dots per inch (dpi) but it’s not necessarily a good idea to assume that value. When this example starts, the following code displays the logical resolution of the screen in dpi. private … Continue reading →

Posted in drawing, graphics | Tagged C#, C# programming, DPI, drawing, example, example program, graphics, resolution, screen resolution, Windows Forms programming | Leave a comment

Print a ListView with large contents in C#

Posted on June 25, 2017 by Rod Stephens

The example Print the contents of a ListView control in C# explains how to print the data in a ListView control when its View property is set to Details. One difficulty when printing this kind of data is that a … Continue reading →

Posted in controls, drawing, graphics, printing | Tagged C#, C# programming, controls, drawing, example, example program, graphics, ListView, multi-line data, multiline data, print ListView, print ListView contents, print ListView data, printing, Windows Forms programming | Leave a comment

Print the contents of a ListView control in C#

Posted on June 22, 2017 by Rod Stephens

The ListView control, like most controls, includes no support for printing. If you want to display a ListView control’s contents on a print out, you need to do all of the printing yourself. Unfortunately printing in C# is extremely flexible … Continue reading →

Posted in controls, drawing, graphics, printing | Tagged C#, C# programming, controls, drawing, example, example program, graphics, ListView, print ListView, print ListView contents, print ListView data, printing, Windows Forms programming | 24 Comments

Make rectangle extension methods in C#

Posted on June 21, 2017 by Rod Stephens

This example shows how to add rectangle extension methods to the Rectangle and RectangleF structs. The Rectangle and RectangleF structs have several useful properties for determining their geometry such as Left, Right, Top, and Bottom, but they have no midpoint … Continue reading →