How Can I Remove Non-Alphanumeric Characters from a String While Keeping Dashes and Spaces?

Eliminating Non-Alphanumeric Characters from a String, Preserving Dashes and Spaces

In scenarios where it's crucial to remove specific non-alphanumeric characters while preserving certain exceptions, it becomes necessary to employ a tailored approach. Here's how to remove all non-alphanumeric characters from a string, except for dashes and spaces:

Solution:

Leveraging regular expressions, we can search for non-alphanumeric characters using the pattern "¹". This expression will match any characters that are not alphanumeric or dashes or spaces. Using the Regex.Replace method, we then substitute these matching characters with an empty string.

Example:

Regex rgx = new Regex("[^a-zA-Z0-9 -]");
string str = "H3llo-W0rld!";
str = rgx.Replace(str, "");

This operation results in the string "H3llo-W0rld", where all non-alphanumeric characters, except dashes and spaces, have been removed.

Note: This method uses the .NET Regular Expressions library, which is a robust tool for manipulating strings based on patterns.

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1. a-zA-Z0-9 - ↩

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