The Aspose.Note for .NET API allows developers to open files & manipulate elements of OneNote books & export them to PNG, GIF, JPEG, BMP and PDF formats. The following code sample shows developers how to save OneNote File as an image in C#/.NET


// Load the document into Aspose.Note.
    Document oneFile = new Document(@"FullFileName.one");
    // Save the document as GIF.
    oneFile.Save("FullFileName.gif", SaveFormat.Gif);
	
    OR

    // Load the document into Aspose.Note.
    Document oneFile = new Document(@"FullFileName.one");
    // Initialize ImageSaveOptions object 
    ImageSaveOptions opts = new ImageSaveOptions(SaveFormat.Png);
    // Set page index
    opts.PageIndex = 1;
    // Save the document as PNG.
    oneFile.Save(@"FullFileName.png", opts);

http://www.aspose.com/blogs/aspose-blogs/imran.rafique/archive/2014/03/04/read-convert-extract-and-manipulate-the-microsoft-onenote-files-using-aspose.note-for-.net-1.0.0.html

The Aspose.Note for .NET API allows developers to open files & manipulate elements of OneNote books & export them to PNG, GIF, JPEG, BMP and PDF formats. The following code sample shows developers how to save OneNote File as an image in C#/.NET

C#/.NET  Code Samples to Save Microsoft OneNote (.one) file as an image (.PNG, .BMP, .JPEG, .GIF) file

object, image, file, search, replace, text, images, files, Net, aspnet, api, convert, c#

C#