Question

Can anyone assist in providing a Regex pattern to find letters between brackets? I.E:

[A]
or
[AAA]
or
[BAB]

The string I’m searching for could be something like this:

([A] * [B] + [AAA])

From that I’d like to be able to get the A, B, AAA out of the string. The letters I’m searching for will always be between square brackets.

Answer 1

Use this regex:

(?<=\[)[A-Za-z]+(?=\])

the matches are in bold:

[A] or [AAA] or [BAB]
([A] * [B] + > [AAA])

You could use it like:

var matches = Regex.Matches(input, @"(?<=\[)[A-Za-z]+(?=\])");