C＃正则表达式提取div的内容

Question

I've seen some related questions of mine, and I tried them but they don't work. I want to match the content from a div with the id "thumbs". But the regex.Success returns false :(

Match regex = Regex.Match(html, @"<div[^>]*id=""thumbs"">(.+?)</div>");

Answer 1

Regex is not a good choice for parsing HTML files..

HTML is not strict nor is it regular with its format..

Use htmlagilitypack

---

Why use parser?

Consider your regex..There are infinite number of cases where you could break your code

• Your regex won't work if there are nested divs
• Some divs dont have an ending tag !(except XHTML)

---

You can use this code to retrieve it using HtmlAgilityPack

HtmlDocument doc = new HtmlDocument();
doc.Load(yourStream);

var itemList = doc.DocumentNode.SelectNodes("//div[@id='thumbs']")//this xpath selects all div with thubs id
                  .Select(p => p.InnerText)
                  .ToList();

//itemList now contain all the div tags content having its id as thumbs

Answer 2

No I dont think he needs escapes. He has @ in front of pattern. I think this is correct:

<div[^>]*id="thumbs">(.+?)</div>

So no double double quotes

Answer 3

Try this:

Regex r = new Regex(@"(?<text>(<div\s*?id=(\""|&quot;|&\#34;)"
    + @"thumb(\""|&quot;|&\#34;).*?>)(?>.*?</div>|.*?<div "
    + @"(?>depth)|.*?</div> (?>-depth))*)(?(depth)(?!)).*?</div>",
    RegexOptions.Singleline);