How-to Articles – Popular HTML Questions in C# Examples

Use this hub to find practical Aspose.HTML for .NET how-to articles with C# examples for styling HTML, editing DOM content, selecting nodes, configuring rendering, saving web pages, and converting measurement units.

The articles in this chapter answer focused developer questions about working with HTML files in C#. Each article explains a specific task and includes C# examples that show how to use Aspose.HTML for .NET APIs in a real workflow.

HTML Styling and Content Updates

• Change HTML Text Color in C# – update text color with inline CSS, internal CSS, HTMLElement.Style, and DOM methods.
• Change HTML Background Color in C# – set background colors for elements, paragraphs, headings, and full HTML pages.
• Change HTML Border Color in C# – add or update border color for HTML elements and tables.
• Add Image to HTML in C# – create img elements, set src and alt attributes, insert images, and use CSS backgrounds.
• Add Alt Text to Images in C# – find images, detect missing alt attributes, update HTML, and improve accessibility and SEO quality.

DOM, Selectors, and XPath

• Use CSS Selectors in C# – select DOM elements with QuerySelector() and QuerySelectorAll() by tag, class, id, attribute, or complex CSS selector.
• Use XPath in HTML with C# – call Document.Evaluate() to select HTML nodes with XPath expressions.
• Select XML Nodes with XPath in C# – query XML documents with XPath axes, predicates, attributes, and relative expressions.
• Serialize HTML Input Values in C# – save filled form field values into HTML output with HTMLSaveOptions.
• Check Empty HTML Text Content in C# – load HTML, read Body.TextContent, and detect empty or whitespace-only content.

Rendering, Fonts, and Layout Utilities

• How to Resize Document During Conversion – set page size, margins, scaling, and output dimensions for PDF, XPS, DOCX, and image rendering.
• Set Custom Font Folder in C# – configure FontsSettings.SetFontsLookupFolder() for HTML to PDF or image rendering with custom fonts.
• How to Save a Webpage as a PDF – load a web page from a URL and save it as PDF with Aspose.HTML for .NET.
• Convert Pixels to Inches in C# – use Unit.FromPixels(), GetValue(), and CSS 96 dpi conversion rules for layout calculations.

More Aspose.HTML for .NET Resources

• Getting Started – install Aspose.HTML for .NET, check system requirements, licensing, supported formats, and first examples.
• Converting Between Formats – convert HTML, SVG, MHTML, EPUB, and Markdown to PDF, XPS, DOCX, images, and Markdown.
• Working with HTML Documents – create, edit, save, configure, and sandbox HTML documents.
• Aspose.HTML for .NET examples on GitHub – download complete C# examples and data files.