Question

I need regular expression (C#) for symbol * – it should match any number of any characters, but it can contain only one space. I tried following, but its not working:

 @".*[^[\t\0x0020]^[\t\0x0020]+].*"
 @".*[^\s^\s+].*"
 @".*[^\s\s+].*"

any way how to create regex like this?

Example: If user write expression MTN*-* it has to match for example

MTN3111-0000

but not

MTN311100  MTN3111-0000

Answer 1

You could use this expression:

\S*\s?\S*

It would match any number of any characters, but allow at most one space.