Convert OneNote to Joplin Markdown

Code Example: OneNote to Joplin Markdown

Here is a sample C# code snippet that demonstrates the full conversion process:

    using Aspose.Html;
    using Aspose.Html.Converters;
    using Aspose.Note;
    using System.IO;

    public void ConvertOneNoteToJoplin()
    {
        string oneFilePath = "path/to/your/onenote-file.one"; // Path to OneNote file
        string mdFilePath = "path/to/output-file.md";         // Output markdown file for Joplin

        using (var ms = new MemoryStream())
        {
            // Step 1: Load the OneNote document and save it as HTML
            Document document = new Document(oneFilePath);
            document.Save(ms, SaveFormat.Html);
            ms.Position = 0;

            // Step 2: Load the HTML from memory stream and convert it to Markdown
            HTMLDocument htmlDocument = new HTMLDocument(ms, "temp.html");
            MarkdownSaveOptions options = new MarkdownSaveOptions();
            Converter.ConvertHTML(htmlDocument, options, mdFilePath);
        }
    }

To convert .one files to Joplin-compatible Markdown in C#, follow these steps:
1. Export OneNote to HTML: Use Aspose.Note for .NET to convert your .one file into an HTML format.
2. Convert HTML to Markdown: Leverage Aspose.Html for .NET to transform the HTML file into Markdown (.md) while retaining formatting and structure.

This code converts a OneNote (.one) file into a Markdown (.md) file compatible with editors like Joplin. It first uses Aspose.Note for .NET to load the .one file and save its content as HTML in a memory stream. Then, it utilizes Aspose.Html for .NET to load the HTML from the stream and convert it into a Markdown file, preserving the structure and formatting. This two-step process ensures the OneNote content is accurately transformed into a lightweight, portable Markdown format.