Thread: regex to capture everything before string OR string

I believe something like this should work...

Code:

using System;
using System.Text.RegularExpressions;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main()
        {
            String filename1 = "The.Matrix.dvdrip.xvid";
            Console.WriteLine(filename1 + " = " + GetName(filename1));
            String filename2 = "Shrek.xvid.dvdrip";
            Console.WriteLine(filename2 + " = " + GetName(filename2));
            Console.Read();
        }

        static String GetName(String text)
        {
            Regex regex = new Regex("([a-zA-Z0-9\\.]+?).(xvid\\.dvdrip|dvdrip\\.xvid)", RegexOptions.IgnoreCase);
            Match match = regex.Match(text);
            return match.Success ? match.Groups[1].Value : null;
        }
    }
}

Originally Posted by theoobe

I believe something like this should work...

Code:

            Regex regex = new Regex("([a-zA-Z0-9\\.]+?).(xvid\\.dvdrip|dvdrip\\.xvid)", RegexOptions.IgnoreCase);

Thank you for a very good answer, very kind to spend that much time.

Now I feel stupid for not saying that I don't know how many tags that can occur.

The input string could also be
Lord.of.the.rings.pal.TS.divx

So I need to cut the string at the first occurrence of any of the words:
pal,divx,xvid,dvdrip,ntsc,hdtv, and so on...

If its just stupid/impossible to do this with regex, please tell me and I'll make a loop :-)

Code:

using System;
using System.Text.RegularExpressions;

namespace ConsoleApplication5
{
    class Program
    {
        static void Main()
        {
            String filename1 = "The.Matrix.dvdrip.xvid";
            Console.WriteLine(filename1 + " = " + GetName(filename1));
            String filename2 = "Shrek.xvid.dvdrip";
            Console.WriteLine(filename2 + " = " + GetName(filename2));
            String filename3 = "Lord.of.the.rings.pal.TS.divx";
            Console.WriteLine(filename3 + " = " + GetName(filename3));
            Console.Read();
        }

        static String GetName(String text)
        {
            Regex regex = new Regex("([a-zA-Z0-9\\.]+?).(pal|divx|xvid|dvdrip|ntsc|hdtv)", RegexOptions.IgnoreCase);
            Match match = regex.Match(text);
            return match.Success ? match.Groups[1].Value : null;
        }
    }
}

:-)

Thank you!

Super fast and exactly what I was looking for !

I suspected I needed a non-greedy qualifier,
but I've tested them on the second group (pal|ntcs...

I feel like I'm much closer to actually understanding regex now

again, thank you!