How to save a document in HTML format using C# and .NET

  1. Add SautinSoft.Document from Nuget.
  2. Load or Create a document.
  3. Save to a HTML format.

  1. Save to a file: 
    
            // The file format will be detected automatically from the file extension: ".html".
            dc.Save(@"d:\Book.html");

    To not rely on the file extension and guarantee that the file contents is really HTML, you may specify HtmlFixedSaveOptions or HtmlFlowingSaveOptions as 2nd parameter. 

    
dc.Save(@"d:\Book.html", new HtmlFixedSaveOptions());

    In HtmlFixedSaveOptions or HtmlFlowingSaveOptions you can also set various options which affects to the saving process.

    In HTML fixed mode the component renders HTML markup using absolutely positioned elements.

    In HTML flowing mode the component renders HTML as a flow document without any absolute positioning.

                dc.Save(@"d:\Book.html", new HtmlFixedSaveOptions()
            {
                Version = HtmlVersion.Html5,
                CssExportMode = CssExportMode.Inline
            });
  2. Save to a Stream: 
                // Let's save our document to a MemoryStream.
            using (MemoryStream ms = new MemoryStream())
            {
                // HTML Fixed.
                dc.Save(ms, new HtmlFixedSaveOptions());
             
                // Or HTML flowing.
                dc.Save(ms, new HtmlFlowingSaveOptions());
            }
 

Complete code

using System.IO;
using SautinSoft.Document;

namespace Example
{
    class Program 
    {        
        static void Main(string[] args)
        {
            // Get your free 100-day key here:   
            // https://sautinsoft.com/start-for-free/

            SaveToHtmlFile();
            SaveToHtmlStream();
        }

        /// <summary>
        /// Open an existing document and saves it as HTML files (in the Fixed and Flowing modes).
        /// </summary>
        /// <remarks>
        /// Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/save-document-as-html-net-csharp-vb.php
        /// </remarks>
        static void SaveToHtmlFile()
        {
            string inputFile = @"..\..\..\example.docx";

            DocumentCore dc = DocumentCore.Load(inputFile);           

            string fileHtmlFixed = @"Fixed-as-file.html";
            string fileHtmlFlowing = @"Flowing-as-file.html";

            // Save to HTML file: HtmlFixed.
            dc.Save(fileHtmlFixed, new HtmlFixedSaveOptions()
            {
                Version = HtmlVersion.Html5,
                CssExportMode = CssExportMode.Inline
            });

            // Save to HTML file: HtmlFlowing.
            dc.Save(fileHtmlFlowing, new HtmlFlowingSaveOptions()
            {
                Version = HtmlVersion.Html5,
                CssExportMode = CssExportMode.Inline,
                ListExportMode = HtmlListExportMode.ByHtmlTags
            });
			
			// Important for Linux: Install MS Fonts
			// sudo apt install ttf-mscorefonts-installer -y

            // Open the results for demonstration purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(fileHtmlFixed) { UseShellExecute = true });
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(fileHtmlFlowing) { UseShellExecute = true });

        }

        /// <summary>
        /// Creates a new document and saves it as HTML documents (in the Fixed and Flowing modes) using MemoryStream.
        /// </summary>
        /// <remarks>
        /// Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/save-document-as-html-net-csharp-vb.php
        /// </remarks>
        static void SaveToHtmlStream()
        {
            // There variables are necessary only for demonstration purposes.
            byte[] fileData = null;
            string fileHtmlFixed = @"Fixed-as-stream.html";
            string fileHtmlFlowing = @"Flowing-as-stream.html";

            // Assume we already have a document 'dc'.
            DocumentCore dc = new DocumentCore();
            dc.Content.End.Insert("Hey Guys and Girls!");

            // Let's save our document to a MemoryStream.
            using (MemoryStream ms = new MemoryStream())
            {
                // HTML Fixed.
                dc.Save(ms, new HtmlFixedSaveOptions());
                fileData = ms.ToArray();

                File.WriteAllBytes(fileHtmlFixed, fileData);

                // Or HTML flowing.
                dc.Save(ms, new HtmlFlowingSaveOptions());
                fileData = ms.ToArray();

                File.WriteAllBytes(fileHtmlFlowing, fileData);
				
				// Important for Linux: Install MS Fonts
			    // sudo apt install ttf-mscorefonts-installer -y
            }
        }
    }
}

Download

Imports System
Imports System.IO
Imports SautinSoft.Document

Module Sample
    Sub Main()
        SaveToHtmlFile()
        SaveToHtmlStream()
    End Sub
    ''' Get your free 100-day key here:   
    ''' https://sautinsoft.com/start-for-free/
    ''' <summary>
    ''' Open an existing document and saves it as HTML files (in the Fixed and Flowing modes).
    ''' </summary>
    ''' <remarks>
    ''' Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/save-document-as-html-net-csharp-vb.php
    ''' </remarks>
    Sub SaveToHtmlFile()
        Dim inputFile As String = "..\..\..\example.docx"

        Dim dc As DocumentCore = DocumentCore.Load(inputFile)

        Dim fileHtmlFixed As String = "Fixed-as-file.html"
        Dim fileHtmlFlowing As String = "Flowing-as-file.html"

        ' Save to HTML file: HtmlFixed.
        dc.Save(fileHtmlFixed, New HtmlFixedSaveOptions() With {
            .Version = HtmlVersion.Html5,
            .CssExportMode = CssExportMode.Inline
        })

        ' Save to HTML file: HtmlFlowing.
        dc.Save(fileHtmlFlowing, New HtmlFlowingSaveOptions() With {
            .Version = HtmlVersion.Html5,
            .CssExportMode = CssExportMode.Inline,
            .ListExportMode = HtmlListExportMode.ByHtmlTags
        })

        ' Open the results for demonstration purposes.
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(fileHtmlFixed) With {.UseShellExecute = True})
        System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(fileHtmlFlowing) With {.UseShellExecute = True})

    End Sub

    ''' <summary>
    ''' Creates a new document and saves it as HTML documents (in the Fixed and Flowing modes) using MemoryStream.
    ''' </summary>
    ''' <remarks>
    ''' Details: https://www.sautinsoft.com/products/document/help/net/developer-guide/save-document-as-html-net-csharp-vb.php
    ''' </remarks>
    Sub SaveToHtmlStream()
        ' There variables are necessary only for demonstration purposes.
        Dim fileData() As Byte = Nothing
        Dim fileHtmlFixed As String = "Fixed-as-stream.html"
        Dim fileHtmlFlowing As String = "Flowing-as-stream.html"

        ' Assume we already have a document 'dc'.
        Dim dc As New DocumentCore()
        dc.Content.End.Insert("Hey Guys and Girls!")

        ' Let's save our document to a MemoryStream.
        Using ms As New MemoryStream()
            ' HTML Fixed.
            dc.Save(ms, New HtmlFixedSaveOptions())
            fileData = ms.ToArray()

            File.WriteAllBytes(fileHtmlFixed, fileData)

            ' Or HTML flowing.
            dc.Save(ms, New HtmlFlowingSaveOptions())
            fileData = ms.ToArray()

            File.WriteAllBytes(fileHtmlFlowing, fileData)
        End Using
    End Sub
End Module

Download

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