问题
Using the html agility pack; how would I extract an html "fragment" from a full html document? For my purposes, an html "fragment" is defined as all content inside of the <body> tags.
For example:
Sample Input:
<html>
<head>
<title>blah</title>
</head>
<body>
<p>My content</p>
</body>
</html>
Desired Output:
<p>My content</p>
Ideally, I'd like to return the content unaltered if it didn't contain an <html> or <body> element (eg. assume that I was passed a fragment in the first place if it wasn't a full html document)
Can anyone point me in the right direction?
回答1:
I think you need to do it in pieces.
you can do selectnodes of document for body or html as follows
doc.DocumentNode.SelectSingleNode("//body") // returns body with entire contents :)
then you can check for null values for criteria and if that is provided, you can take the string as it is.
Hope it helps :)
回答2:
The following will work:
public string GetFragment(HtmlDocument document)
{
return doc.DocumentNode.SelectSingleNode("//body") == null ? doc.DocumentNode.InnerHtml : doc.DocumentNode.SelectSingleNode("//body").InnerHtml;
}
来源：https://stackoverflow.com/questions/4348520/html-agility-pack-get-html-fragment-from-an-html-document