.NET API for working with real-world HTML

Editing HTML Documents

Aspose.HTML for .NET allows you to create and edit HTML documents using a Document Object Model (DOM). The DOM is a programming interface for HTML documents that represents the document (as nodes and objects) as a node tree, where each node represents part of the document. Aspose.HTML for .NET API lets you connect to the page and can change the document structure, style, and content. You can modify the document by inserting new nodes and removing or editing existing nodes' content.

The .NET HTML API assists developers to read, modify, navigate and edit (X)HTML documents. Some file editing functions that the Aspose.HTML for .NET API can perform are the following:
- navigate HTML documents by using various methods, such as, element traversal, document traversal, XPath queries, and CSS selector queries,
- remove and replace HTML nodes,
- extract and edit CSS from HTML,
- configure a document sandbox and more.

Markdown Support

Markdown is a markup language with a plain-text-formatting syntax. Markdown is often used as a format for documentation and readme files since it allows writing in an easy-to-read and easy-to-write style. Aspose.HTML provides a powerful and flexible Markdown Converter that can convert in both directions from Markdown to HTML and from HTML to Markdown. Moreover, the converter API has a set of predefined rules, so you can convert HTML to Markdown using the authentic Markdown syntax, GitLab Flavored Markdown modification or even configure the rules for your needs.

// Load an HTML file
using var document = new Aspose.Html.HTMLDocument("document.html");

// Convert HTML to Markdown using a set of features supported by GitLab Flavored Markdown
document.Save("output.md", Aspose.Html.Saving.MarkdownSaveOptions.Git);

The reverse conversion is that simple!

// Convert Markdown to HTML
Aspose.Html.Converters.Converter.ConvertMarkdown("document.md", "output.html");

You can try online Markdown Converter here.

Electronic Books and Web Archives

The Electronic Books (EPUB) formats and Web Archive (MHTML) formats supported out-of-the-box. API offers high fidelity rendering EPUB and MHTML files to the supported output formats such as PDF, XPS and Image file formats.

//  Convert EPUB to PDF
Aspose.Html.Converters.Converter.ConvertEPUB("document.epub", new Aspose.Html.Saving.PdfSaveOptions(), "output.pdf");

//  Convert MHTML to PDF
Aspose.Html.Converters.Converter.ConvertMHTML("document.mht", new Aspose.Html.Saving.PdfSaveOptions(), "output.pdf");

Web Scraping

Web scraping, also well known as web harvesting, web data extraction or web crawling, is a technique to extract data from a website. Aspose.HTML doesn't support a Web Scraping module out-of-the-box. However, using Aspose.HTML API that is entirely based on W3C specification and supports XPath and CSS Selector queries you can easily inspect the content of any HTML document and create your own Web Scraping solution.

// Create an instance of the HTML document with a website as a parameter
using var document = new Aspose.Html.HTMLDocument("https://en.wikipedia.org/wiki/Aspose_API");

// Get all anchor-elements
var elements = document.QuerySelectorAll("a");

// Dump the anchor-element data to the console
elements.Cast<HTMLAnchorElement>().ToList().ForEach(x =>
    {
        System.Console.WriteLine("[Href]: " + x.Href);
        System.Console.WriteLine("[Content]: " + x.TextContent);
    });