Monthly Archives: July 2020

Use VBA code to pick random cells from a filtered selection in an Excel workbook

Posted on July 31, 2020 by RodStephens

This example shows how you can use VBA code to pick random cells in an Excel workbook when the selected cells are filtered. The post Use VBA code to pick random cells from the currently selected cells in an Excel … Continue reading →

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Make multi-image icons from files in C#

Posted on July 31, 2020 by RodStephens

The post Make multi-image icon files in C# showed how to create several bitmaps at runtime and then used them to create multi-image icons in C#. This example lets you load multiple saved image files and use them to create … Continue reading →

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Make multi-image icon files in C#

Posted on July 29, 2020 by RodStephens

The most interesting thing about icon files is that they can contain several images with different sizes. When a program needs to display the icon, it can pick the size that is appropriate. For example, Windows 10 displays icons in … Continue reading →

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Use command line arguments to open files in C#

Posted on July 23, 2020 by RodStephens

Whenever a C# program starts, it receives command line arguments. You can use those arguments to let your program open files that are associated with the program. For example, when you double-click a .doc or .docx file, Microsoft Word opens … Continue reading →

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Make a digital clock in C#

Posted on July 21, 2020 by RodStephens

This example uses the techniques described in the example Draw LED-style letters in C# to draw a digital clock. That earlier example showed one way to draw LED-style letters. This example simply uses the LedText class from that post to … Continue reading →

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Draw LED-style letters in C#

Posted on July 20, 2020 by RodStephens

Every now and then I’ve had the urge to write a digital clock program, and to do that, I need to be able to draw LED-style letters. (Some things are practically a right of passage for programmers. Writing a program … Continue reading →

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Use Microsoft Print to PDF to create a PDF file in C#

Posted on July 19, 2020 by RodStephens

This example shows one way that you can make a C# program create a PDF file. It’s super easy. (I haven’t posted any easy examples for a while, so this one makes a refreshing change.) Selecting the Printer In a … Continue reading →

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Use menu commands with shortcuts to save and restore user-drawn polygons in C# and WPF

Posted on July 13, 2020 by RodStephens

The example Let the user edit polygons in WPF and C# shows how to let the user draw and edit polygons in WPF. This example shows how you can let the user save and restore those polygons. While I was … Continue reading →

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Pingback: Code Project post “Clipping Plane in WPF 3D”

Posted on July 12, 2020 by RodStephens

The Code Project post Clipping Plane in WPF 3D by charles922 references a couple of my WPF 3D posts. His post explains several WPF 3D concepts including; Manger sponges (refers to my post Use a dictionary to draw a 3D … Continue reading →

Posted in 3D, 3D graphics, algorithms, books, drawing, graphics, mathematics, wpf, XAML | Tagged , , , , , , , , , , , , , , | 4 Comments

Sprialize an image in C#

Posted on July 10, 2020 by RodStephens

This example shows how to spiralize an image. By spiralize I mean shade pieces of the picture with different colors so the colored areas for a spiral as shown in the picture. This could be a difficult problem. Fortunately I’ve … Continue reading →

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