从字符串中获取HTML标记

Question

What is the best and cleanest way of getting a html tag from a string?

I have a string of html with several embed tags containing videos. There can be any number of embed tag in the html string

I guess i could do something like this but it can't be the best way:

string embedSrc = propertyText.Substring(propertyText.IndexOf("<embed"), (propertyText.IndexOf  ("</embed") - propertyText.IndexOf("<embed") + 8));

Answer 1

Try using the HtmlAgilityPack to parse it easily. If not you could use a regular expression

Answer 2

I think you can use C# api for this. Try using XmlDocument's LoadXml(string) method. After that just use the object operations to extract inner tags or texts from it. Take a look at XmlDocument from MSDN

Answer 3

Sebastian has the right of it, find a library and the HtmlAgilityPack is a great option. If you need the document structure, this is really the best option.

Parsing with Regular Expressions is generally considered a no-no for HTML. It really depends on what you're trying to read out of the input string. I wrote a lightweight xml/html parser using Regex just to see it done. This can provide you with the Regex patterns needed.