Regex matching characters after pattern

Question

I'm trying to extract strings after a pattern in a long string, which is basically HTML output of a page.

For example; I need to extract target of href tag from this string

<h2 class=\ "product-name\"><a href=\"/erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...">...</a></h2>\r\n

What I need from this: erkek-ayakkabi-spor-gri-17sfd3007141340-p

But also I need to find strings alike to the one above. SO I need to search for href tags after class=\ "product-name\" in the HTML string.

How can I achieve this?

See [What is the best way to parse html in C#?](http://stackoverflow.com/questions/56107). — Wiktor Stribiżew, May 11 '17 at 06:59
I'm working on an already writen code, I just need to do a minimal change. I don't have time to fundamentally change the way we parse html now. Maybe later. — Ege Bayrak, May 11 '17 at 07:01

csharpbd · Accepted Answer · 2017-05-11T07:33:22.710

1

Please check this.

Regex:

class=\"product-name\"(.*)<a\shref=\"(.*?)\"

Updated Regex:

class=\"product-name\".*<a\shref=\"(.*?)\"

Regex101 Example.

C# Code:

using System;
using System.Text.RegularExpressions;

public class Program
{
    public static void Main()
    {
        string data = "<h2 class=\"product-name\"><a href=\"erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...\">...</a></h2>\r\n<h2 class=\"test-name\"><a href=\"erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...\">...</a></h2>\r\n<h2 class=\"product-name\"><a href=\"erkek-ayakkabi-spor-gri-17sfd3007141340-p\" title=\"...\">...</a></h2>\r\n";
        //string regex = "class=\"product-name\"(.*)<a\\shref=\"(.*?)\"";
        string regex = "class=\"product-name\".*<a\\shref=\"(.*?)\"";
        var matches = Regex.Matches(data, regex, RegexOptions.Multiline);
        foreach(Match item in matches)
        {
            //Console.WriteLine("Value: " + item.Groups[2]);
            Console.WriteLine("Value: " + item.Groups[1]);
        }
    }
}

DotNetFiddle Example.

edited May 11 '17 at 07:33

answered May 11 '17 at 07:08

csharpbd

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Damn, I literally just wrote the exact same code... :) – Webbanditten May 11 '17 at 07:09
why do you need the first group? – Lei Yang May 11 '17 at 07:14
If there is others `tag` before `a` after `class="product-name"`. – csharpbd May 11 '17 at 07:14
1

i still don't understand. `.*` will be enough, why`(.*)` – Lei Yang May 11 '17 at 07:20

Regex matching characters after pattern

1 Answers1