Convert RTF string to HTML string in C# and .NET


Complete code 

using System;
using System.IO;
using System.Text;

namespace Sample
{
    class sample
    {
        static void Main(string[] args)
        {
            // Read our RTF file a string.
            string inpFile = @"..\..\example.rtf";
            string rtfString = File.ReadAllText(inpFile);

            // We'll use the file only for the demonstration.
            string outFile = @"Result.html";
            string htmlString = String.Empty;

            SautinSoft.RtfToHtml r = new SautinSoft.RtfToHtml();

            // Specify some properties for output HTML document.
            r.OutputFormat = SautinSoft.RtfToHtml.eOutputFormat.HTML_5;
            r.Encoding = SautinSoft.RtfToHtml.eEncoding.UTF_8;

            // Imagefolder must already exist.
            r.ImageStyle.ImageFolder = System.Environment.CurrentDirectory;

            // Subfolder for images will be created by the component.
            r.ImageStyle.ImageSubFolder = "image.files";

            // A template name for images.
            r.ImageStyle.ImageFileName = "picture";

            // false - store images as files on HDD,
            // true - store images inside HTML document using base64.
            r.ImageStyle.IncludeImageInHtml = false;

            try
            {
                r.OpenRtf(rtfString);

                // Here we've got the HTML document as string.
                r.ToHtml(out htmlString);

                // Save our HTML into file and open it for the demonstration purposes.
                File.WriteAllText(outFile, htmlString);
                System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile)
                { UseShellExecute = true });
            }
            catch (Exception e)
            {
                Console.WriteLine($"Error: {e.Message}");
                Console.WriteLine("Press any key ...");
                Console.ReadKey();
            }
        }
    }
}

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Imports System
Imports System.IO
Imports System.Text

Namespace Sample
	Friend Class sample
		Shared Sub Main(ByVal args() As String)
			' Read our RTF file a string.
			Dim inpFile As String = "..\..\example.rtf"
			Dim rtfString As String = File.ReadAllText(inpFile)

			' We'll use the file only for the demonstration.
			Dim outFile As String = "Result.html"
			Dim htmlString As String = String.Empty

			Dim r As New SautinSoft.RtfToHtml()

			' Specify some properties for output HTML document.
			r.OutputFormat = SautinSoft.RtfToHtml.eOutputFormat.HTML_5
			r.Encoding = SautinSoft.RtfToHtml.eEncoding.UTF_8

			' Imagefolder must already exist.
			r.ImageStyle.ImageFolder = Environment.CurrentDirectory

			' Subfolder for images will be created by the component.
			r.ImageStyle.ImageSubFolder = "image.files"

			' A template name for images.
			r.ImageStyle.ImageFileName = "picture"

			' false - store images as files on HDD,
			' true - store images inside HTML document using base64.
			r.ImageStyle.IncludeImageInHtml = False

			Try
				r.OpenRtf(rtfString)

				' Here we've got the HTML document as string.
				r.ToHtml(htmlString, Nothing)

				' Save our HTML into file and open it for the demonstration purposes.
				File.WriteAllText(outFile, htmlString)
				System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
			Catch e As Exception
				Console.WriteLine($"Error: {e.Message}")
				Console.WriteLine("Press any key ...")
				Console.ReadKey()
			End Try
		End Sub
	End Class
End Namespace

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