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Category Archives: extensions
Make bitmap extension methods that resize bitmaps in C#
The post Resize pictures in a directory to specific widths or heights in C# lets you resize all of the pictures in a directory. This example extracts the key method that resizes files and places it in a new Bitmap … Continue reading
Use string extension methods to validate Social Security numbers in C#
This example defines three extension methods that return true if strings contain Social Security numbers. Recall that you must add extension methods to a static class and that the methods must be static. This example begins by defining a Matches … Continue reading
Add an extension method to the Graphics class in C#
For some strange reason, the Graphics class’s DrawRectangle method cannot take a RectangleF as a parameter. It can take a Rectangle or four float values, and the FillRectangle method can take a RectangleF as a parameter, but the DrawRectangle method … Continue reading
Make string extensions to URL encode and decode strings in C#
When you URL encode a string, you convert special characters into numeric sequences thath are safe to use in a URL. When you URL decode a string, you reverse the process. The following code creates extension methods for the string … Continue reading
Convert between byte arrays and hexadecimal strings in C#
This example uses extension methods to convert between byte arrays and hexadecimal strings. It adds a ToHex extension method to the byte[] type and a ToBytes extension method to the string class. To create an extension method, create a public … Continue reading
Posted in algorithms, cryptography, extensions, strings
Tagged algorithms, byte array, byte array to hexadecimal string, C#, C# programming, converrt byte array, convert, convert hexadecimal string, cryptography, example, example program, extensions, hexadecimal string to byte array, string extentions, strings, Windows Forms programming
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Use the BitConverter class to write extension methods to convert between byte arrays and strings of hexadecimal values in C#
This is a new version of the example Write extension methods to convert between byte arrays and strings of hexadecimal values in C# that takes a slightly different approach. The following code shows the new versions of the extension methods. … Continue reading
Posted in extension methods, extensions, strings
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