How to fix html tags(which is missing the <open> & <close> tags) with HTMLAgilityPack

问题

I have an html with <div><h1> hello Hi</div> <div>hi </p></div>

Required Output : <div><h1> hello </h1></div> <div><p>hi </p></div>

Using HTML agility pack is it possible to fix this kind of similar issues with missing closing and opening tags?

回答1:

The library isn't intelligent enough to create the opening p where you put it, but it's intelligent enough to create the missing h1. And in general, it creates valid HTML always, but not always the one you would expect.

So this code:

        HtmlDocument doc = new HtmlDocument();
        doc.Load(yourhtml);
        doc.Save(Console.Out);

will dump this:

<div><h1> hello Hi</h1></div> <div>hi <p></div>

Which is not what you want, but is valid HTML. You can also add a little trick like this:

        HtmlNode.ElementsFlags["p"] = HtmlElementFlag.Closed;
        HtmlDocument doc = new HtmlDocument();
        doc.Load(yourhtml);
        doc.Save(Console.Out);

that will dump this:

<div><h1> hello Hi</h1></div> <div>hi <p></p></div>

回答2:

When doing HtmlAgilityPack.HtmlDocument.LoadHTML(yourhtml) HTMLAgilityPack will automatically fix the tags for you, and then you can access those tags using: HtmlAgilityPack.HtmlDocument.DocumentNode.OuterHTML

来源：https://stackoverflow.com/questions/18396699/how-to-fix-html-tagswhich-is-missing-the-open-close-tags-with-htmlagilit