Can Html Agility Pack handle HTML fragments?

Yes, Html Agility Pack (HAP) can handle HTML fragments quite well. Html Agility Pack is a .NET library used to parse HTML documents and fragments, allowing developers to manipulate or extract information from HTML content easily.

When dealing with HTML fragments, which are parts of an HTML document rather than a complete document with a <html> root node, you can use HAP to load the fragment and work with it as you would with a full document. Below is an example of how you can load and handle an HTML fragment using Html Agility Pack in C#:

using HtmlAgilityPack;
using System;

class Program
{
    static void Main(string[] args)
    {
        // Define your HTML fragment
        string htmlFragment = @"
            <div class='content'>
                <p>This is a paragraph in a div element.</p>
            </div>";

        // Create an instance of HtmlDocument
        HtmlDocument htmlDoc = new HtmlDocument();

        // Load the HTML fragment
        htmlDoc.LoadHtml(htmlFragment);

        // Now you can handle the fragment with XPath or other methods provided by HAP
        HtmlNode divNode = htmlDoc.DocumentNode.SelectSingleNode("//div[@class='content']");

        if (divNode != null)
        {
            Console.WriteLine(divNode.InnerHtml);
            // Output: <p>This is a paragraph in a div element.</p>
        }
    }
}

In the example above, we create a string variable containing an HTML fragment. We then instantiate an HtmlDocument object and use the LoadHtml method to load the fragment. After the fragment is loaded, we can perform various operations on it, such as selecting specific nodes using XPath expressions.

It's important to note that the Html Agility Pack will create a document structure for the fragment, adding any missing parent tags such as <html>, <body>, or <head> if you try to access them. However, these tags are not included in the output unless explicitly part of the fragment you're working with.

Html Agility Pack is a powerful tool for parsing and manipulating HTML in .NET applications, and its ability to handle fragments makes it particularly useful when working with HTML content that may not be complete or well-formed.

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