Converting HTML to Word documents is essential for seamless document sharing, archiving, and preserving formatting consistency. It simplifies editing, integrates smoothly with other tools, and ensures compliance with industry standards. Additionally, Word documents provide offline access and a professional look, making them ideal for formal submissions. Ultimately, this conversion enhances accessibility and streamlines content management.

This article explores how to use C# and Spire.Doc for .NET to convert HTML files and strings into Word documents, providing clear examples and step-by-step instructions.

• Convert an HTML File to Word in C#
• Append an HTML String to Word in C#

Install Spire.Doc for .NET

To begin with, you need to add the DLL files included in the Spire.Doc for .NET package as references in your .NET project. The DLL files can be either downloaded from this link or installed via NuGet.

PM> Install-Package Spire.Doc

Convert an HTML File to Word in C#

To convert an HTML file to a Word document, you primarily use the Document class from the Spire.Doc library. This class provides methods to load HTML content from a file and save it in various formats.

The following are the key steps to convert an HTML file to a Word document using C# with Spire.Doc:

• Create a Document object.
• Load an HTML file using the Document.LoadFromFile() method.
• Saves the document as a Word file using the Document.SaveToFile() method.

using Spire.Doc;
using Spire.Doc.Documents;

namespace ConvertHtmlFileToWord
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Document object
            Document document = new Document();

            // Load an HTML file
            document.LoadFromFile(@"C:\Users\Administrator\Desktop\MyHtml.html", FileFormat.Html, XHTMLValidationType.None);

            // Get the first section
            Section section = document.Sections[0];

            // Set the page margins
            section.PageSetup.Margins.All = 2;

            // Save the document to a Word file
            document.SaveToFile("ToWord.docx", FileFormat.Docx);

            // Dispose resources
            document.Dispose();
        }
    }
}

Append an HTML String to Word in C#

In certain circumustancs, you may need to create or modify HTML content dynamically at runtime, for example, generating HTML strings based on user input. Spire.Doc allows you to render HTML strings into a Word document using the Paragraph.AppendHTML() method.

The following are the key steps to append HTML stings to Word using C# and Sprie.Doc:

• Create a Document object.
• Add a section and a paragraph to the document.
• Read an HTML string from an HTML file or any other data sources.
• Render the HTML string into the document using the Paragraph.AppendHTML() method.
• Saves the document as a Word file using the Document.SaveToFile() method.

using Spire.Doc;
using Spire.Doc.Documents;
using System.Drawing;
using System.Drawing.Imaging;

namespace AppendHtmlStringToWord
{
    class Program
    {
        static void Main(string[] args)
        {
            // Create a Document object
            Document document = new Document();

            // Add a section to the document
            Section section = document.AddSection();

            // Set the page margins
            section.PageSetup.Margins.All = 2;

            // Add a paragraph to the section
            Paragraph paragraph = section.AddParagraph();

            // Read HTML string from a file
            string htmlFilePath = @"C:\Users\Administrator\Desktop\Html.html";
            string htmlString = File.ReadAllText(htmlFilePath, System.Text.Encoding.UTF8);

            // Append the HTML string to the paragraph
            paragraph.AppendHTML(htmlString);

            // Save the document to a Word file
            document.SaveToFile("AppendHtml.docx", FileFormat.Docx);

            // Dispose resources
            document.Dispose();
        }
    }
}

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