How to Convert RTF to HTML and Vice Versa using .NET Core DocIO?

Syncfusion Essential DocIO is a .NET Word library used to create, read, edit, and convert Word documents programmatically without Microsoft Word or interop dependencies. Using this library, you can convert RTF to HTML and HTML to RTF using C#.

In this article, we read files from a directory, detect their format, and convert RTF to HTML or vice versa. The converted files are then saved in the output folder.

Steps to convert RTF to HTML and HTML to RTF:

1. Create a new .NET Core console application project.
2. Install the Syncfusion.DocIO.Net.Core NuGet package as a reference to your project from NuGet.org.
   
   

3. Include the following namespaces in Program.cs file.
   C#

using Syncfusion.DocIO.DLS;
using Syncfusion.DocIO; 

4. Use the following code to fetch all files from the “Data” directory and initiate conversion.
   C#

// Get all files from the "Data" directory.
string[] files = Directory.GetFiles(@"Data");
RTF_HTML_Conversion(files);

5. Use the following code example to convert RTF documents to HTML and vice versa.
   C#

private static void RTF_HTML_Conversion(string[] files)
{
   // Iterate through each input file in the given directory
   foreach (string inputFile in files)
   {
       using (FileStream inputStream = new FileStream(inputFile, FileMode.Open, FileAccess.Read))
       {
           using (WordDocument document = new WordDocument(inputStream, FormatType.Automatic))
           {
               // Determine the output format based on the actual format of the document
               // If the document is RTF, convert it to HTML, otherwise convert it to RTF
               FormatType outputFormat = (document.ActualFormatType == FormatType.Rtf) ? FormatType.Html : FormatType.Rtf;
               // Create a destination path by changing the extension of the input file
               string destinationPath = Path.ChangeExtension(inputFile.Replace("Data", "Output"), outputFormat.ToString());
               using (FileStream outputStream = new FileStream(destinationPath, FileMode.Create, FileAccess.ReadWrite))
               {
                   // Save the document in the determined output format (either HTML or RTF)
                   document.Save(outputStream, outputFormat);
               }
           }
       }
   }
}

You can download a complete working sample to convert RTF to HTML and HTML to RTF from the GitHub.

RTF to HTML conversion

HTML to RTF conversion

Take a moment to peruse the documentation where you can find basic Word document processing options along with the features like mail merge, merge, split, and compare Word documents, find and replace text in the Word document, protect the Word documents, and most importantly, the PDF and Image conversions with code examples.

See Also

• RTF Conversions
• HTML Conversions

Conclusion

I hope you enjoyed learning how to convert RTF to HTML and vice versa in .NET Core Word.

You can refer to our ASP.NET Core DocIO feature tour page to know about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications. You can also explore our ASP.NET Core DocIO example to understand how to create and manipulate data.

For current customers, you can check out our components from the License and Downloads page. If you are new to Syncfusion, you can try our 30-day free trial to check out our other controls.

If you have any queries or require clarifications, please let us know in the comments section below. You can also contact us through our support forums, Direct-Trac, or feedback portal. We are always happy to assist you!