Regular Expression to isolate an html tag
Question
I'm looking for a regular expression to isolate an html tag. This includes the TAG the ATTRIBUTES and the CONTNET inside.
Let's say I have this:
<html>
<body>
aajsdfkjaskd
<TAGNAME name="bla" context="non">hfdfhdj </TAGNAME>
</body>
</html>
I need a regular expression that would return:
<TAGNAME name="bla" context="non">hfdfhdj </TAGNAME>
Thank, Joe
5 answers
solution1
2 2012-07-11 15:15:21
Don't use a regex, use an HTML parser instead. Much more reliable and easier to work with.
If you're a PHP developer I recommend you use this one (http://simplehtmldom.sourceforge.net/).
solution2
1 2012-07-11 15:16:32
查看HTML Agility Pack，它将使事情变得容易得多。
solution3
0 2012-07-11 15:13:14
使用此正则表达式<TAGNAME.+?</TAGNAME>
solution4
0 2012-07-11 15:16:04
If this is the main thing you're trying to do, XLST is a good tool to do it with. You can easily select just TAGNAME and copy over the attributes and text. See http://www.w3schools.com/xsl/ for an intro.
solution5
0 2012-07-11 15:41:48
First of all: don't do this. Parsing HTML with regex is a maintenance nightmare and will most probably fail on any real world example of HTML. There are better options (like using a HTML parser like the HTML Agility pack ).
To answer your question though, the following regex will do what you want if the HTML code
- is well formed (no missing closing tag, etc)
- does not contain comments with "TAGNAME" in them
- does not contain script blocks with "TAGNAME" in them
- maybe more
It can be expanded to cover some of these cases, but you really don't want to =)
<TAGNAME(<TAGNAME (?<tagcounter>)|</TAGNAME>(?<-tagcounter>)|.)*</TAGNAME>(?(tagcounter)(?!))
You'd need RegexOptions.SingleLine , too. See it in action at Ideone.com
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