public static void SetSlideID(PresentationPart presentationPart, SlidePart slidePart1)
{
// Insert the new slide into the slide list after the previous slide.
SlideIdList slideIdList = presentationPart.Presentation.SlideIdList;
// Find the highest slide ID in the current list.
uint maxSlideId = 1;
SlideId prevSlideId = null;
foreach (SlideId slideId in slideIdList.ChildElements)
{
if (slideId.Id > maxSlideId)
{
maxSlideId = slideId.Id;
prevSlideId = slideId;
}
}
maxSlideId++;
SlideId newSlideId = slideIdList.AppendChild(new SlideId());
newSlideId.Id = maxSlideId;
newSlideId.RelationshipId = presentationPart.GetIdOfPart(slidePart1);
}
public void Add()
{
//need to assign an id to the new slide and add it to the slideIdList
//first figure out the largest existing id
SlideIdList slideIdList = _doc.PresentationPart.Presentation.SlideIdList;
uint[] maxSlideId = { 1 };
foreach (
SlideId slideId in
slideIdList.ChildElements.Cast <SlideId>().Where(slideId => slideId.Id > maxSlideId[0]))
{
maxSlideId[0] = slideId.Id;
}
//assign an id and add the new slide at the end of the list
var newSlideId = new SlideId
{
Id = ++maxSlideId[0],
RelationshipId = _doc.PresentationPart.GetIdOfPart(NewSlidePart)
};
slideIdList.AppendChild(newSlideId);
}