Convert EPUB to XPS | C#

In this article, you will find information on how to convert EPUB to XPS and how to use XpsSaveOptions and ICreateStreamProvider parameters.

Online EPUB Converter

You can check the Aspose.HTML API functionality and convert EPUB in real-time. Please load an EPUB file from the local file system, select the output format and run the example. In the example, the save options are set by default. You will immediately receive the result as a separate file.

Code example in C# to convert document formats
Input file
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Output format
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If you want to convert EPUB to XPS programmatically, please see the following C# code examples.

EPUB to XPS by two lines of code

The static methods of the Converter class are primarily used as the easiest way to convert an EPUB file into various formats. You can convert EPUB to XPS in your C# application literally with two lines of code!

using System.IO;
using Aspose.Html.Converters;
using Aspose.Html.Saving;
...
     // Open an existing EPUB file for reading
     using var stream = File.OpenRead(DataDir + "input.epub");

     // Invoke the ConvertEPUB method to convert EPUB to XPS           
     Converter.ConvertEPUB(stream, new XpsSaveOptions(), Path.Combine(OutputDir, "convert-by-two-lines.xps"));

Convert EPUB to XPS

Using Converter.ConvertEPUB methods is the most common way to convert EPUB files into various formats. The following C# code snippet shows how to convert EPUB to XPS using Aspose.HTML for .NET.

  1. Open an existing EPUB file. In the example, we use the OpenRead() method of System.IO.FileStream class to open and read an EPUB file from the file system at the specified path.
  2. Create an instance of XpsSaveOptions.
  3. Use the ConvertEPUB() method of the Converter class to save EPUB as an XPS file. You need to pass the EPUB file stream, XpsSaveOptions, and output file path to the ConvertEPUB() method to convert EPUB to XPS.
using System.IO;
using Aspose.Html.Converters;
using Aspose.Html.Saving;
...
     // Open an existing EPUB file for reading
     using var stream = File.OpenRead(DataDir + "input.epub");

     // Prepare a path to save the converted file 
     string savePath = Path.Combine(OutputDir, "input-output.xps");
    
     // Create an instance of XpsSaveOptions
     var options = new XpsSaveOptions();
    
     // Call the ConvertEPUB method to convert EPUB to XPS
     Converter.ConvertEPUB(stream, options, savePath); 

Save Options

With Aspose.HTML, you can convert EPUB to XPS format programmatically with full control over a wide range of conversion parameters. XpsSaveOptions usage enables you to tune the rendering process; you can specify the page size, margins, CSS, etc.

Property Description
PageSetup This property gets a page setup object and uses it for configuration output page-set.
Css Gets a CssOptions object which is used for configuration of CSS properties processing.
BackgroundColor This property sets the color that will fill the background of every page. By default, this property is Transparent.
HorizontalResolution Sets horizontal resolution for output images in pixels per inch. The default value is 300 dpi.
VerticalResolution Sets vertical resolution for output images in pixels per inch. The default value is 300 dpi.

Convert EPUB to XPS using XpsSaveOptions

Aspose.HTML allows converting EPUB to XPS using default or custom save options. You should follow a few steps:

  1. Open an existing EPUB file.
  2. Create a new XpsSaveOptions object and specify the required save options.
  3. Use the ConvertEPUB() method to save EPUB as an XPS file. You need to pass the EPUB file stream, XpsSaveOptions, and output file path to the ConvertEPUB () method for EPUB to XPS conversion.

The following example shows how to use XpsSaveOptions and create an XPS file with custom save options:

using System.IO;
using Aspose.Html;
using Aspose.Html.Converters;
using Aspose.Html.Saving;
using System.Drawing;
using Aspose.Html.Drawing;
...
    // Open an existing EPUB file for reading
    using var stream = File.OpenRead(DataDir + "input.epub");

    // Prepare a path to save the converted file 
    string savePath = Path.Combine(OutputDir, "input-options.xps");
    
    // Create an instance of XpsSaveOptions. Set up the page-size and change the background color to LightGray 
    var options = new XpsSaveOptions()
    {
        PageSetup =
            {
                AnyPage = new Page()
                {
                    Size = new Aspose.Html.Drawing.Size(Length.FromPixels(500), Length.FromPixels(500))
                }
            },
        BackgroundColor = Color.LightGray
    };
    
    // Call the ConvertEPUB method to convert EPUB to XPS
    Converter.ConvertEPUB(stream, options, savePath); 

In the example, we use the OpenRead() method of System.IO.FileStream class to open and read source files from the file system at the specified path. The XpsSaveOptions() constructor initializes an instance of the XpsSaveOptions class that is passed to ConvertEPUB() method. The ConvertEPUB() method takes the stream, options, output file path savePath and performs the conversion operation. The XpsSaveOptions class provides numerous properties that give you full control over a wide range of parameters and improve the process of EPUB to XPS conversion.

In the example, we use:

  • BackgroundColor property that specifies the color that the background will be filled in. The default BackgroundColor is Transparent;
  • PageSetup property that specifies the page size in pixels.

Aspose.HTML for .NET provides various types of output formats for rendering operations. Some of these formats produce a single output file (for instance PDF, XPS), others create multiple files (Image formats JPEG, PNG, etc.).

Output Stream Providers

If it is required to save files in the remote storage (e.g., cloud, database, etc.) you can implement ICreateStreamProvider interface to have manual control over the file creating process. This interface is designed as a callback object to create a stream at the beginning of the document/page (depending on the output format) and release the early created stream after rendering the document/page.

The example below shows how to implement and use your own MemoryStreamProvider in the application:

using System.IO;
using System.Collections.Generic;
...
    class MemoryStreamProvider : Aspose.Html.IO.ICreateStreamProvider
    {
        // List of MemoryStream objects created during the document rendering
        public List<MemoryStream> Streams { get; } = new List<MemoryStream>();

        public Stream GetStream(string name, string extension)
        {
            // This method is called when only one output stream is required, for instance for XPS, PDF or TIFF formats.
            MemoryStream result = new MemoryStream();
            Streams.Add(result);
            return result;
        }
    
        public Stream GetStream(string name, string extension, int page)
        {
            // This method is called when the creation of multiple output streams are required. For instance, during the rendering HTML to list of image files (JPG, PNG, etc.)
            MemoryStream result = new MemoryStream();
            Streams.Add(result);
            return result;
        }
    
        public void ReleaseStream(Stream stream)
        {
            //  Here you can release the stream filled with data and, for instance, flush it to the hard-drive
        }
    
        public void Dispose()
        {
            // Releasing resources
            foreach (var stream in Streams)
                stream.Dispose();
        }
    }
using System.IO;
using Aspose.Html;
using System.Linq;
using Aspose.Html.Converters;
using Aspose.Html.Saving;
...
    // Create an instance of MemoryStreamProvider
    using var streamProvider = new MemoryStreamProvider();

    // Open an existing EPUB file for reading
    using var stream = File.OpenRead(DataDir + "input.epub");
    
    // Prepare a path to save the converted file 
    string savePath = Path.Combine(OutputDir, "stream-provider.xps");
    
    // Convert EPUB to XPS by using the MemoryStreamProvider class
    Converter.ConvertEPUB(stream, new XpsSaveOptions(), streamProvider);
    
    // Get access to the memory stream that contains the result data
    var memory = streamProvider.Streams.First();
    memory.Seek(0, SeekOrigin.Begin);
    
    // Flush the result data to the output file
    using (FileStream fs = File.Create(savePath))
    {
        memory.CopyTo(fs);
    }

The ConvertEPUB(Stream, XpsSaveOptions, ICreateStreamProvider) method takes the conversion source, options, and instance of MemoryStreamProvider, which will be used to get an output stream, and performs the conversion operation.

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