Extracting version information using Regex

Question

I need to extract version information from the following string

993-756-V01 ver 02a

What regex I need to use in order to extract 01 and 02 from 993-756-V 01 ver 02 a

I tried to extract the version substring ie V01 ver 02a with the below regex.

[A-Z][0-9]{2} ver [0-9]{2}

But is there a more direct way to extract the information

Answer 1

You may use a regex with named capturing groups to capture the information you need. See the following code:

var s = "993-756-V01 ver 02a";
var result = Regex.Match(s, @"(?<major>[0-9]+)\s+ver\s+(?<minor>[0-9]+)");
if (result.Success)
{
    Console.WriteLine("Major: {0}\nMinor: {1}", 
        result.Groups["major"].Value, result.Groups["minor"].Value);
}

See the C# demo

Pattern details :

• (?<major>[0-9]+) - Group "major" capturing 1+ digits
• \\s+ - 1+ whitespaces
• ver\\s+ - ver substring and then 1+ whitespaces
• (?<minor>[0-9]+) - Group "minor" capturing 1+ digits

Answer 2

Another short possibilility i see is to use the below pattern:

V(\d+)\D+(\d+)

Here:

V     = Literal `V` capital alphabet.
(\d+) = Captures any digit from 0-9 following `V` character. 
\D+   = Anything except digit next to digits. (A way to find the next numeric part of your version number)
(\d+) = Captures any digit from 0-9 following non-digit characters.

Demo