How to Remove Non-ASCII Characters from Strings in C#?

Efficiently Removing Non-ASCII Characters in C# Strings

Data cleaning often requires removing non-ASCII characters from strings. C#'s Regex.Replace method provides a concise solution for this common task.

Example:

<code class="language-csharp">string inputString = "søme string with non-ASCII characters.";
string outputString = Regex.Replace(inputString, @"[^\u0000-\u007F]+", "");</code>

Breakdown of the Regular Expression:

The regular expression [^u0000-u007F] targets and removes all characters outside the ASCII range. Let's break it down:

• [^...]: This is a negated character class. It matches any character not within the specified set.
• u0000-u007F: This defines the range of ASCII characters (Unicode code points 0 to 127).
• : This quantifier ensures that one or more consecutive non-ASCII characters are matched and replaced.

Replacing the matched characters with an empty string ("") effectively removes them from the original string. This approach offers a clean and efficient way to handle non-ASCII character removal in C#.

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