I got a bunch (10k+) of documents, it’s actually not only .doc but also .ppt and .xls files that needs to be converted to docx, pptx and xlsx. I am to upload these documents to SharePoint and have an environment with SharePoint, Visual Studio, Office 2010 Pro and so on.
Are there any best practices to perform this?
I’ve been looking a bit at Aspose.Words but 2500 usd seems a bit over the top for a one time conversion.
You can use Word ( and PowerPoint ) in automation from c#, have a look here as a starting point, you can loops among the old file and call the save in the new format programmatically.