Category Archives: drawing

Let the user scribble on a background image in C#

Posted on September 23, 2020 by RodStephens

The post Let the user scribble on a PictureBox in C# shows how you can let the user draw with the mouse. This example lets you load a background image. It also lets you save the result into an image … Continue reading →

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Draw a radar chart in C#

Posted on September 20, 2020 by RodStephens

A radar chart shows measurements along several axes that all radiate out from a common center. This lets you compare several properties for different objects at the same time. in a way, you can think of a radar chart as … Continue reading →

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Revised: Graph world total COVID-19 cases, deaths, and recoveries in C#

Posted on September 17, 2020 by RodStephens

This post revises the example Graph world total COVID-19 cases, deaths, and recoveries in C#. Ulrich Rosin left a comment on that post. He added a seven-day average. He also displayed tick marks for the beginning of each month instead … Continue reading →

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Crop scaled images to a desired aspect ratio in C#

Posted on August 19, 2020 by RodStephens

I often need to crop images and sometimes I want a specific aspect ratio. (In case you haven’t heard this term before, the aspect ratio is the ratio of the image’s width to height. As an equation, it’s width / … Continue reading →

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Test graphical transformations in C#

Posted on August 6, 2020 by RodStephens

This example draws several pictures to let you test graphical transformations. The general approach is the same for each picture. The following section explains how the program draws the pictures that demonstrate the various graphical transformations. The sections after that … 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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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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