Home/ Questions/Q 7871037
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-03T01:47:32+00:00

I have the following regular expression which specifies characters the user is allowed to

  • 0

I have the following regular expression which specifies characters the user is allowed to type:

@"^[A-Za-z0-9/!\$%\^&\*\(\)\-_\+\[\]\{\}\;\:\'\£\@\#\.\?]*$

I know ‘\s‘ is the character class for white space, but how do I add this to the regular expression so it excludes it? I have searched for this on Stack Overflow – the questions provide solutions to exclude white space but not how to use it in an existing regular expression. If I add it like I have the other characters, it would mean ‘allow white space’?

Edit: Not sure why this has been marked down? Thanks to everyone for their answers

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    First of all, you don’t need all those escapes.
    Second of all, the regex already doesn’t allow whitespaces.

    @"^[A-Za-z0-9\[\]/!$%^&*()\-_+{};:'£@#.?]*$"

    The [] define a set of characters to allow (followed by * means that characters from the characters set can be zero or more times).

    ^ matches the beginning and $ matches the end, so the fact that /s isn’t anywhere there, means white spaces won’t be allowed.

    • 0