Regex match take a very long time to execute

Question

I wrote a regular expression that parses a file path into different group (DRIVE, DIR, FILE, EXTENSION).

^((?[a-zA-Z]):\\\\)*((?[a-zA         


        

Answer 1

I'd just use the FileInfo and Path classes to obtain the info.

Should you choose to use a regex, then note that the regex doesn't match all legal filenames: There's a whole bunch of legal filename tokens missing from your regex.