I am trying to parse some HTML of a directory listing page using c#. That page has many file urls like "0220109_120548.046.jpg" but has also others like "0220109_120548.046-445x265.jpg". They are the same picture but one has its dimensions in the name.

I need a regex to match only the urls of those files without the dimensions.

I tried this one : href="^"*.(gif|jpg|png)"

but its not working.

the regex101 url: https://regex101.com/r/APS9NY/1

CodePudding user response：

Here is one way to do so:

href=\"[^\"]*?(?<!\d{2,4}x\d{2,4})\.(gif|jpg|png)\"

See here for the online demo.

• href=\": Matches href="
• [^\"]*?: Any character that isn't ", between zero and unlimited times, as few as possible.
• (?<!): Negative lookbehind.
  • \d{2,4}: Matches between 2 and 4 digits.
  • x: Matches x.
• \.: Matches ..
• (gif|jpg|png): Matches either gif, jpg orpng.
• \": Matches ".