How do I parse HTML using regular expressions in C#?

How do I parse HTML using regular expressions in C#?

For example, given HTML code

<s2> t1 </s2>  <img src='1.gif' />  <span> span1 <span/>

I am trying to obtain

1.  <s2>
2.  t1
3. <开发者_运维技巧/s2>
4. <img src='1.gif' />
5. <span>
6. span1
7. <span/>

How do I do this using regular expressions in C#?

In my case, the HTML input is not well-formed XML like XHTML. Therefore I can not use XML parsers to do this.

Regular expressions are a very poor way to parse HTML. If you can guarantee that your input will be well-formed XML (i.e. XHTML), you can use XmlReader to read the elements and then print them out however you like.

This has already been answered literally dozens of times, but it bears repeating: regular expressions can only parse regular languages, that's why they are called regular expressions. HTML is not a regular language (as probably every college student in the last decade has proved at least once), and therefore cannot be parsed by regular expressions.

You might want to try the Html Agility Pack, http://www.codeplex.com/htmlagilitypack. It even handles malformed HTML.

I used this regx in C#, and it works. Thanks for all your answers.

<([^<]*)>|([^<]*)

you might want to simply use string functions. make < and > as your indicator for parsing.