Question

Folks,

I have method that returns true if all characters are “legal” and false if a single character is “illegal”. The definition is below (legal = letters, numbers, and some characters like $, – , %, etc). I want a newline and/or carriage return character to be “illegal”. However, the method below thinks that its legal. How can I fix-up?

  private static bool NameHasAllLegalCharacters( string name )
    {
        var regexAlphaNum = new Regex( @"[^a-zA-Z0-9#\$%\^&\*\(\)\._\-\+=\[\]/<>{}:\s]" );
        return !regexAlphaNum.IsMatch( name );
    }

Answer 1

\s matches all whitespace, not just the ASCII space.