Convert PDF to EPUB, LaTeX, Text, XPS in C#

Convert PDF to EPUB

EPUB is a free and open e-book standard from the International Digital Publishing Forum (IDPF). Files have the extension .epub. EPUB is designed for reflowable content, meaning that an EPUB reader can optimize text for a particular display device. EPUB also supports fixed-layout content. The format is intended as a single format that publishers and conversion houses can use in-house, as well as for distribution and sale. It supersedes the Open eBook standard.

The following code snippet also work with Aspose.PDF.Drawing library.

Aspose.PDF for .NET also supports the feature to convert PDF documents to EPUB format. Aspose.PDF for .NET has a class named EpubSaveOptions which can be used as the second argument to Document.Save(..) method, to generate an EPUB file. Please try using the following code snippet to accomplish this requirement with C#.

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.PDF-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();
// Load PDF document
Document pdfDocument = new Document(dataDir + "PDFToEPUB.pdf");
// Instantiate Epub Save options
EpubSaveOptions options = new EpubSaveOptions();
// Specify the layout for contents
options.ContentRecognitionMode = EpubSaveOptions.RecognitionMode.Flow;
// Save the ePUB document
pdfDocument.Save(dataDir + "PDFToEPUB_out.epub", options);

Convert PDF to LaTeX/TeX

Aspose.PDF for .NET support converting PDF to LaTeX/TeX. The LaTeX file format is a text file format with the special markup and used in TeX-based document preparation system for high-quality typesetting.

To convert PDF files to TeX, Aspose.PDF has the class LaTeXSaveOptions which provides the property OutDirectoryPath for saving temporary images during the conversion process.

The following code snippet shows the process of converting PDF files into the TEX format with C#.

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.PDF-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_DocumentConversion();

// Create Document object
Aspose.Pdf.Document doc = new Aspose.Pdf.Document(dataDir + "PDFToTeX.pdf");

// Instantiate LaTex save option          
LaTeXSaveOptions saveOptions = new LaTeXSaveOptions();

// Specify the output directory
string pathToOutputDirectory = dataDir;

// Set the output directory path for save option object
saveOptions.OutDirectoryPath = pathToOutputDirectory;

// Save PDF file into LaTex format           
doc.Save(dataDir + "PDFToTeX_out.tex", saveOptions);

Convert PDF to Text

Aspose.PDF for .NET support converting whole PDF document and single page to a Text file.

Convert whole PDF document to Text file

You can convert PDF document to TXT file using Visit method of TextAbsorber class.

The following code snippet explains how to extract the texts from the all pages.

public static void ConvertPDFDocToTXT()
{
    // Open document
    Document pdfDocument = new Document(_dataDir + "demo.pdf");
    TextAbsorber ta = new TextAbsorber();
    ta.Visit(pdfDocument);
    // Save the extracted text in text file
    File.WriteAllText(_dataDir + "input_Text_Extracted_out.txt",ta.Text);
}

Convert PDF page to text file

You can convert PDF document to TXT file with Aspose.PDF for .NET. You should use Visit method of TextAbsorber class for resolve this task.

The following code snippet explains how to extract the texts from the particular pages.

public static void ConvertPDFPagestoTXT()
{
    Document pdfDocument = new Document(System.IO.Path.Combine(_dataDir, "demo.pdf"));
    TextAbsorber ta = new TextAbsorber();
    var pages = new [] {1, 3, 4};
    foreach (var page in pages)
    {
        ta.Visit(pdfDocument.Pages[page]);
    }
   
    // Save the extracted text in text file
    File.WriteAllText(System.IO.Path.Combine(_dataDir, "input_Text_Extracted_out.txt"), ta.Text);
}

Convert PDF to XPS

Aspose.PDF for .NET gives a possibility to convert PDF files to XPS format. Let try to use the presented code snippet for converting PDF files to XPS format with C#.

The XPS file type is primarily associated with the XML Paper Specification by Microsoft Corporation. The XML Paper Specification (XPS), formerly codenamed Metro and subsuming the Next Generation Print Path (NGPP) marketing concept, is Microsoft’s initiative to integrate document creation and viewing into the Windows operating system.

To convert PDF files to XPS, Aspose.PDF has the class XpsSaveOptions that is used as the second argument to the Document.Save(..) method to generate the XPS file.

Since the 24.2 release, Aspose.PDF has implemented converting Searchable PDF to XPS while keeping Text Selectable in the resultant XPS. To preserve text, it’s necessary to set the XpsSaveOptions.SaveTransparentTexts property to true.

The following code snippet shows the process of converting PDF file into XPS format.


using (var document = new Document("input.pdf"))
{
    var xpsOptions = new XpsSaveOptions
    {
        SaveTransparentTexts = true
    };
    document.Save("output.xps", xpsOptions);
}

Convert PDF to Markdown

Aspose.PDF for .NET gives a possibility to convert PDF files to MD format. Let try to use the presented code snippet for converting PDF files to MD format with C#.

Markdown is a lightweight markup language designed to represent plain text formatting with maximum human readability and machine-readability to advanced publishing languages.

Optimize image usage by PDF to Markdown converter

You can notice that in directories with images, the number of images is smaller than the number of images in PDF files.

Since the markdown file cannot set the image size, without the MarkdownSaveOptions.UseImageHtmlTag option, the same kind of pictures with different sizes are saved as different.

For the enabled option MarkdownSaveOptions.UseImageHtmlTag will save unique images, which are scaled in the document by the img tag.

The code opens a PDF document, configures the parameters for converting it to a Markdown file (saving any images in the folder named “images”), and saves the resulting Markdown file in the specified output path.

The following code snippet shows the process of converting PDF file into MD format.


    string inputPdfPath = "";
    string markdownOutputFilePath = "";

    // Create a new Document object using the specified input PDF path.
    using (Document doc = new Document(inputPdfPath))
    {
        // Create an instance of MarkdownSaveOptions to configure the Markdown export settings.
        MarkdownSaveOptions saveOptions = new MarkdownSaveOptions()
        {
            // Set to false to prevent the use of HTML <img> tags for images in the Markdown output.
            UseImageHtmlTag = false
        }
            // Specify the directory name where resources (like images) will be stored.
            saveOptions.ResourcesDirectoryName = "images";

        // Save the document in Markdown format to the specified output file path using the defined save options.    
        doc.Save(markdownOutputFilePath, saveOptions);
    }
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