Update word to newest format with open xml

Question

I have an application that download docx file from a service. The problem is that the service creates the docx with the an old format (I think it used the open xml version 2.0). I don't own the service so I can't change the creation process of the word , but I thought about building a convertor , that will open the downloaded files and recreate them in the newest format using the open xml sdk version 2.5. I was optimistic when I thought this code will work ( A simple open and save) :

WordprocessingDocument  wordprocessingDocument =
                         WordprocessingDocument.Open(filePath, true);
 wordprocessingDocument.MainDocumentPart.Document.Save();

I'm not fimiliar with the open xml sdk , so any help will be appreciated.

Answer 1

You're just opening the doc and saving it with no changes. You need to change the Word version, then save it. This article should provide the info you need: http://blogs.msmvps.com/wordmeister/2013/01/18/openxmlsdk-word-compatibility-mode/