How Can I Remove All HTML Tags from a String Efficiently?

Stripping HTML from Strings without Specifying Tags

Question:

How can I effortlessly eradicate all HTML tags from a string, regardless of the specific tags involved?

Example:

Consider the following HTML-rich string:

string title = "<b>Hulk Hogan's Celebrity Championship Wrestling     <font color=\"#228b22\">[Proj # 206010]</font></b>     (Reality Series,)

Ideally, we want the output to be:

"Hulk Hogan's Celebrity Championship Wrestling [Proj # 206010] (Reality Series)"

Solution:

Regex Approach:

One efficient solution utilizes regular expressions:

public static string StripHTML(string input)
{
   return Regex.Replace(input, "<.*?>", String.Empty);
}

This regex matches any string enclosed in angle brackets (< and >) and replaces it with an empty string.

HTML Agility Pack:

Alternatively, you can leverage the HTML Agility Pack library:

HTMLDocument doc = new HTMLDocument();
doc.LoadHtml(input);
string stripped = doc.DocumentNode.InnerText;

This method parses the HTML string and returns only the text content, excluding all tags and attributes.

Caveats:

While these methods effectively remove HTML tags, they have limitations:

• The regex approach can miss some complex HTML structures.
• The HTML Agility Pack can be slower for large HTML documents.

It's important to choose the appropriate solution based on your specific requirements and trade-offs.

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