Tag Archives: example program

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

Produce a repeatable series of “random” numbers in C#

Posted on July 25, 2017 by Rod Stephens

The Random class can generate a series of pseudo-random numbers. They’re called “pseudo-random” rather than “random” because the numbers are generated by a mathematical algorithm rather than by some completely unpredictable process such as observing a source of radioactive decay … Continue reading →

Posted in algorithms, mathematics | Tagged algorithms, C#, C# programming, example, example program, inirialize random number generator, mathematics, pseudo-random numbers, random, random class, random number generator, random numbers, seed, Windows Forms programming | Leave a comment

Safely manage documents in C#

Posted on July 22, 2017 by Rod Stephens

This is a pretty involved example that shows how to safely manage documents. The pieces are all simple but there are a lot of tightly integrated pieces. This example lets you create, edit, open, and save files in text and … Continue reading →

Posted in files, forms, user interface | Tagged C#, C# programming, close, document control, document management, example, example program, files, FormClosing, forms, manage documents, open new, save, save as, user interface, user interface design, 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

Create a class outside of any namespace statement in C#

Posted on July 15, 2017 by Rod Stephens

When you create a class in C#, Visual Studio automatically puts it inside a namespace statement. If your project’s name is howto_remove_namespace, then by default that namespace is howto_remove_namespace. But did you know that you can create classes outside of … Continue reading →

Posted in classes, syntax | Tagged C#, C# programming, classes, example, example program, namespace, syntax, Windows Forms programming | 2 Comments

Book Review: The Manga Guide to Linear Algebra

Posted on July 15, 2017 by Rod Stephens

(Occasionally I post reviews of book that I think may interest programmers, in this case admittedly only those with a mathematical inclination.) The Manga Guide to Linear Algebra $24.95, 264 pages, 2012 By Shin Takahashi No Starch Press ISBN … Continue reading →

Posted in books, mathematics | Tagged book reviews, books, C#, C# programming, example, example program, linear algebra, mathematics, Windows Forms programming | Leave a 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

Make Ctrl+A select all of the text in a TextBox in C#

Posted on July 8, 2017 by Rod Stephens

Often it’s convenient for the user to be able to press Ctrl+A to select all of the text in the TextBox that has the focus. Strangely that’s not the default behavior for the TextBox. Perhaps the TextBox doesn’t handle Ctrl+A … Continue reading →