How to write regex in C# to get inner value of
12.45.45.47
?

Question

Hello I trying to get inner HTML of <p class="mojeip">12.45.45.47</p> in C#, i tried something like>

    Regex emailregex = new Regex(@"(<p class=""mojeip"">)(.*?)(</p>)");

But still cannot get only IP address.

Thanks for any advice.

http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454 — Ignacio Vazquez-Abrams, Dec 18 '10 at 18:40
@Ignacio Vazquez-Abrams: Wow, that's _way_ better than the one I found: http://stackoverflow.com/questions/1058852/regex-to-get-src-value-from-an-img-tag — David, Dec 18 '10 at 18:43

score 2 · Accepted Answer · answered Dec 18 '10 at 18:54

2

I am sure you are going to get plenty of RegEx solutions. So I want to propose an alternate solution.

I have often used RegEx to extract data from HTML, but more recently I have used the Html Agility Pack and I would highly recommend that if it does not feel like too much of an overkill for your task.

answered Dec 18 '10 at 18:54

Chris Taylor

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+1. The required XPath would be `//p[@class='mojeip']/text()` – Tomalak Dec 18 '10 at 19:00

score 0 · Answer 2 · answered Dec 18 '10 at 18:45

If your input string is exactly this complicated and no more, then you could try capturing ([^<]*) instead of (.*?). In real life, you're probably trying to parse HTML or XHTML, and almost certainly want to use a tool other than regex, as per Ignacio's comment above.

nan · Answer 3 · 2010-12-18T18:55:17.250

0

Regex's are not good for HTML because it is not a regular language.

If you want just this simple action you may use string manipulation and Linq:

   string s = @"<p class=""mojeip"">12.45.45.47</p>";

   var result = s.Skip(s.IndexOf(@"""mojeip""") +
                @"""mojeip""".Length + 1).TakeWhile(c => c != '<').ToArray();

   Console.WriteLine(new string(result));

edited Dec 18 '10 at 18:55

answered Dec 18 '10 at 18:48

nan

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score 0 · Answer 4 · answered Dec 18 '10 at 18:56

0

This query should do it:

(?<=<[^/].*?>).*(?=</.*>)

Only parse XML/HTML with Regex if invoking tools like LINQ to XML and such is out of the question for performance or whatever reasons tho.

answered Dec 18 '10 at 18:56

Machinarius

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How to write regex in C# to get inner value of 12.45.45.47?

4 Answers4

How to write regex in C# to get inner value of
12.45.45.47
?