Allow double-byte space in Regex

Question

I have a regex on my C# code to check if the name that end user entered is valid, my regex deny double-byte characters like double-byte space.

The double-byte space like the space between quotation “　“ .

My regex: @"^[\p{L}\p{M}\p{N}' \.\-]+$".

I'm already tried to edit this regex to accept double-byte space, but I did not reach meaningful result.

So please if any one can edit this regex to accept double-byte space, I will be thankful for him.

Answer 1

You need to replace a literal space with a pattern that matches any horizontal Unicode whitespace and in .NET regex, it can be achieved with \p{Zs}.

@"^[\p{L}\p{M}\p{N}\p{Zs}'.-]+$"

See the regex demo.

Note this pattern does not match a TAB char. If you need to match a TAB, too, you just need to add it,

@"^[\p{L}\p{M}\p{N}\p{Zs}\t'.-]+$"

Note you do not need to escape . and - in this regex. . inside square brackets is not any special regex metacharacter and - is not special when it is placed at the end of the character class.