RegEx Match可以以不同的单词结束

Question

I want to match a few lines, but they can end different. With "Registrar:" or "Registered:".

So I naive tried this:

Registrant's address:(\s*)(?<Value>.*).*((Registrar:)|(Registered:))

What do I wrong with this OR Operator?

(The goal is to leach data from different tlds with RegEx directly from the WhoIs Server)

1. Data:

Domain name: argos.co.uk

 Registrant: Argos Ltd Registrant type: UK Public Limited Company, (Company number: 1081551) Registrant's address: Avebury 489-499 Avebury Boulevard Central Milton Keynes Milton Keynes MK9 2NW United Kingdom Registered through: NetNames Limited URL: http://www.netnames.co.uk 

I want this:

  Avebury 489-499 Avebury Boulevard Central Milton Keynes Milton Keynes MK9 2NW United Kingdom 

2. Data:

 Domain name: amazon.co.uk Registrant: Amazon Europe Holding Technologies SCS Registrant type: Unknown Registrant's address: 65 boulevard GD. Charlotte Luxembourg City Luxembourg LU-1311 Luxembourg Registrar: Amazon.com [Tag = AMAZON-COM] URL: http://www.amazon.com Relevant dates: Registered on: before Aug-1996 Expiry date: 05-Dec-2020 Last updated: 23-Oct-2013 

I want this:

  65 boulevard GD. Charlotte Luxembourg City Luxembourg LU-1311 Luxembourg 

Answer 1

It seems that you don't need regex here

var result = String.Join(Environment.NewLine, File.ReadLines(filename)
                .SkipWhile(x => !x.StartsWith("Registrant's address:"))
                .Skip(1)
                .TakeWhile(x => !String.IsNullOrEmpty(x)));

Answer 2

The : in your regex simply isn't present in your text and you'll need to specify RegexOptions.Singleline if you haven't already to allow . to match new lines.

Registrant's address:(\s*)(?<Value>.*).*((Registrar)|(Registered))

You have many capture groups that probably are unnecessary.

Registrant's address:\s*(?<Value>.*).*Regist(?:rar|ered)

Another note, you might hit some problem with greedy matching if you have consecutive records in the text you are trying to match. Adding a few ? will solve the problem:

Registrant's address:\s*(?<Value>.*?).*?Regist(?:rar|ered)

Answer 3

You could use the following regex to match only the data you need without capturing unnecessary data.

Using lookaround assertions:

(?<=Registrant's address:).*(?=(?:Registrar:|Registered:))

Working example:

http://regex101.com/r/cN5wP3

just make sure to use RegexOptions.Singleline .

EDIT:

And to capture the match in the named group value you would have this:

(?<=Registrant's address:)(?<value>.*)(?=(?:Registrar:|Registered:))

Example:

http://regex101.com/r/fY3oR9