Capturing a repeated group

Question

I am attempting to parse a string like the following using a .NET regular expression:

H3Y5NC8E-TGA5B6SB-2NVAQ4E0

and return the following u

Answer 1

After reviewing your question and the answers given, I came up with this:

RegexOptions options = RegexOptions.None;
Regex regex = new Regex(@"([ABCDEFGHJKLMNPQRSTVXYZ0123456789]{8})", options);
string input = @"H3Y5NC8E-TGA5B6SB-2NVAQ4E0";

MatchCollection matches = regex.Matches(input);
for (int i = 0; i != matches.Count; ++i)
{
    string match = matches[i].Value;
}

Since the "-" is optional, you don't need to include it. I am not sure what you was using the {4} at the end for? This will find the matches based on what you want, then using the MatchCollection you can access each match to rebuild the string.