How to Remove Non-Alphanumeric Characters (Except Dashes and Spaces) from a String Using Regex?

Removing Non-Alphanumeric Characters Except for Dash and Space

When working with strings, you may encounter the need to remove all non-alphanumeric characters while retaining dash (-) and space characters. This can be achieved effectively using regular expressions.

Regex Approach:

Regular expressions provide a powerful way to search and manipulate strings. To remove non-alphanumeric characters except for dash and space, you can use the following regular expression:

[^a-zA-Z0-9 -]

This expression matches any character that is not a letter, number, dash, or space.

Regex.Replace Method:

Once you have the regular expression, you can use the Regex.Replace method to remove the matched characters from your string. The following code demonstrates how to use this method:

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

In this code, rgx is a new Regex object created with the specified pattern. The Regex.Replace method replaces all occurrences of the matched pattern with an empty string, effectively removing the non-alphanumeric characters except for dash and space.

This approach is efficient and allows you to easily remove the unwanted characters from your string while preserving the desired ones.

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