How to delete all embedded objects in Word and PowerPoint using Open XML SDK?

Question

I am trying to delete all embedded object from Word and PowerPoint files using openxml SDK. I am new to Open XML and not sure whether I am doing this correctly. Below is the code I have. My intention is to remove any objects embedded and to delete images embedded. Both codes when executed are giving errors.

Code that I tried to delete all embedded items in the document.

using (var wdDoc = WordprocessingDocument.Open(wordFilePath, true))
{
    var docPart = wdDoc.MainDocumentPart;
    var document = docPart.Document;
    var embeddedObjectsCount = docPart.EmbeddedObjectParts.Count();
    while (embeddedObjectsCount > 0)
    {
        docPart.DeletePart(docPart.EmbeddedObjectParts.FirstOrDefault());
        embeddedObjectsCount = docPart.EmbeddedObjectParts.Count();
    }
}

Code that I tried to delete all images in the document. (This works partially if I don't have any objects embedded in the document.)

using (var wdDoc = WordprocessingDocument.Open(wordFilePath, true))
{
    var docPart = wdDoc.MainDocumentPart;
    var document = docPart.Document;
    var imageObjectsCount = docPart.ImageParts.Count();
    while (imageObjectsCount > 0)
    {
        docPart.DeletePart(docPart.ImageParts.FirstOrDefault());
        imageObjectsCount = docPart.ImageParts.Count();
    }
}

When I run the above code the file I use is getting corrupted. I would like to know how to remove all embedded objects from Word without corrupting the file.

I haven't done anything on PowerPoint yet, but I hope it would be similar to Word document.

Answer 1

I managed to find a solution for my problem. I had to dive in to the concepts of Open XML SDK to get this. However, I am not so sure on whether this is the optimal solution.

Goal

1. Remove all embedded objects in PowerPoint and Word.

2. Remove all images in PowerPoint and Word.

For Word

//using Ovml = DocumentFormat.OpenXml.Vml.Office;
//Determine whether there are any Embedded Objects in the document
using (var wdDoc = WordprocessingDocument.Open(wordFilePath, true))
{
    var docPart = wdDoc.MainDocumentPart;
    var docHasEmbeddedOleObjects = document.Body.Descendants<Ovml.OleObject>().Any();
    if (docHasEmbeddedOleObjects)
    {
        foreach (var oleObj in document.Body.Descendants<Ovml.OleObject>())
        {
            oleObj.Remove(); //Remove each ole object in the document. This will remove the object from view in word.
        }
        //Delete the embedded objects. This will remove the actual attached files from the document.
        docPart.DeleteParts(docPart.EmbeddedObjectParts);
        //Delete all picture in the document
        docPart.DeleteParts(docPart.ImageParts);
    }
}

For PowerPoint

using (var ppt = PresentationDocument.Open(powerPointFilePath, true))
{
    foreach (var slide in slides)
    {
        //Remove Ole Objects
        var oleObjectCount = slide.Slide.Descendants<OleObject>().Count();
        while (oleObjectCount > 0)
        {
            var oleObj = slide.Slide.Descendants<OleObject>().FirstOrDefault();
            var oleObjGraphicFrame = oleObj?.Ancestors<GraphicFrame>().FirstOrDefault();
            if (oleObjGraphicFrame != null)
            {
                oleObjGraphicFrame.RemoveAllChildren();
                oleObjGraphicFrame.Remove();
            }
            oleObjectCount = slide.Slide.Descendants<OleObject>().Count();
        }
        //Delete embedded objects
        slide.DeleteParts(slide.EmbeddedObjectParts);
        //Delete all pictures
        slide.DeleteParts(slide.ImageParts);
    }
}