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Create PowerPoint presentation using PowerPoint template

, 15 Apr 2012 CPOL
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Convert *.potx file to *.pptx file.


The article tells how to create PowerPoint presentation using PowerPoint template and Office OpenXML SDK 2.0. I assume the users have basic knowledge about Office OpenXML. 


To do so, first we need an existing PowerPoint template (*.potx file).  

Using the code 

  1. Create a simple .potx file.
  2. Open Microsoft PowerPoint Presentation. The left panel contains a default slide, delete it. On the File menu, click Save As. In the File name box, type a name for your template, and then, in the Save as type box, select PowerPoint Template(*.potx). Let’s name this template as SimplePresentationTemplate.potx.

  3. Copy this template into a MemoryStream.
  4. MemoryStream templateStream = null;             
    using (Stream stream = File.Open(“SimplePresentationTemplate.potx”, FileMode.Open, FileAccess.Read)) 
        templateStream = new MemoryStream((int)stream.Length); 
        templateStream.Position = 0L; 

    stream.Copy(templateStream) copies the FileStream into the MemoryStream. This is an extension method. 

    public static void Copy(this Stream source, Stream target) 
        if (source != null) 
            MemoryStream mstream = source as MemoryStream; 
            if (mstream != null) mstream.WriteTo(target); 
                byte[] buffer = new byte[2048]; // this array length is sufficient for simple files 
                int length = buffer.Length, size; 
                while ((size = source.Read(buffer, 0, length)) != 0) 
                    target.Write(buffer, 0, size); 
  5. Create presentation file using the stream.
  6. using (PresentationDocument prstDoc = PresentationDocument.Open(templateStream, true)) 
            PresentationPart presPart = prstDoc.PresentationPart; 
              “" + 
              new Uri((“SimplePresentationTemplate.potx”, UriKind.Absolute));
  7. Save the memory stream into a file:
  8. File.WriteAllBytes(“PresentationFile1.pptx”, presentationStream.ToArray());

That’s it.. The presentation file PresentationFile1.pptx got created without altering the template file. 


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

QuestionpresentationStream? Pinmembermartonx11-Dec-13 22:15 
Questionunable to get the presProps.xml in my generated PPTX document Pinmembercatherine91-Dec-12 5:02 

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