はい、IDが一意でない場合、問題に直面します。以下は、私が使用している作業コードです。私はその古いスレッドを知っていますが、もし誰かが答えを探しているなら、
public static void MergeSlides(string presentationFolder, string sourcePresentation, string destPresentation)
{
int id = 0;
// Open the destination presentation.
using (PresentationDocument myDestDeck = PresentationDocument.Open(presentationFolder + destPresentation, true))
{
PresentationPart destPresPart = myDestDeck.PresentationPart;
// If the merged presentation does not have a SlideIdList element yet, add it.
if (destPresPart.Presentation.SlideIdList == null)
destPresPart.Presentation.SlideIdList = new SlideIdList();
// Open the source presentation. This will throw an exception if the source presentation does not exist.
using (PresentationDocument mySourceDeck = PresentationDocument.Open(presentationFolder + sourcePresentation, false))
{
PresentationPart sourcePresPart = mySourceDeck.PresentationPart;
// Get unique ids for the slide master and slide lists for use later.
uniqueId = GetMaxSlideMasterId(destPresPart.Presentation.SlideMasterIdList);
uint maxSlideId = GetMaxSlideId(destPresPart.Presentation.SlideIdList);
// Copy each slide in the source presentation, in order, to the destination presentation.
foreach (SlideId slideId in sourcePresPart.Presentation.SlideIdList)
{
SlidePart sp;
SlidePart destSp;
SlideMasterPart destMasterPart;
string relId;
SlideMasterId newSlideMasterId;
SlideId newSlideId;
// Create a unique relationship id.
id++;
sp = (SlidePart)sourcePresPart.GetPartById(slideId.RelationshipId);
relId = sourcePresentation.Remove(sourcePresentation.IndexOf('.')) + id;
// Add the slide part to the destination presentation.
destSp = destPresPart.AddPart<SlidePart>(sp, relId);
// The slide master part was added. Make sure the relationship between the main presentation part and
// the slide master part is in place.
destMasterPart = destSp.SlideLayoutPart.SlideMasterPart;
destPresPart.AddPart(destMasterPart);
// Add the slide master id to the slide master id list.
uniqueId++;
newSlideMasterId = new SlideMasterId();
newSlideMasterId.RelationshipId = destPresPart.GetIdOfPart(destMasterPart);
newSlideMasterId.Id = uniqueId;
destPresPart.Presentation.SlideMasterIdList.Append(newSlideMasterId);
// Add the slide id to the slide id list.
maxSlideId++;
newSlideId = new SlideId();
newSlideId.RelationshipId = relId;
newSlideId.Id = maxSlideId;
destPresPart.Presentation.SlideIdList.Append(newSlideId);
}
// Make sure that all slide layout ids are unique.
FixSlideLayoutIds(destPresPart);
}
// Save the changes to the destination deck.
destPresPart.Presentation.Save();
}
}
public static void FixSlideLayoutIds(PresentationPart presPart)
{
//Need to make sure all slide layouts have unique ids
foreach (SlideMasterPart slideMasterPart in presPart.SlideMasterParts)
{
foreach (SlideLayoutId slideLayoutId in slideMasterPart.SlideMaster.SlideLayoutIdList)
{
uniqueId++;
slideLayoutId.Id = (uint)uniqueId;
}
slideMasterPart.SlideMaster.Save();
}
}