PowerPoint Open XML SDK新幻灯片创建问题

Question

我们使用下面的代码段将新幻灯片添加到现有幻灯片平台。这段代码将内容正确地添加到了幻灯片中，但是当通过PowerPoint打开时，它表示演示文稿已损坏并提示修复。修复后，演示文稿将打开，但是新添加的幻灯片将显示为空白幻灯片，没有任何内容（当解压缩PPTX文件时，内容在slide.xml文件中）。

使用“ Open XML SDK 2.5生产力工具”分析生成的演示文稿时，会显示以下错误消息，

public SlidePart CopySlidePart(PresentationPart presentationPart, SlidePart slidePart)
{
     int i = presentationPart.SlideParts.Count();
     //Create a new slide part in the presentation.
     SlidePart newSlidePart = presentationPart.AddNewPart<SlidePart>("newSlide" + i);

     i++;
     //Add the source slide content into the new slide.
     newSlidePart.FeedData(slidePart.GetStream(FileMode.Open));
     //Make sure the new slide references the proper slide layout.

      newSlidePart.AddPart(slidePart.SlideLayoutPart, slidePart.GetIdOfPart(slidePart.SlideLayoutPart));

     //Get the list of slide ids.
     SlideIdList slideIdList = presentationPart.Presentation.SlideIdList;
     //Deternmine where to add the next slide (find max number of slides).
     uint maxSlideId = 1;
     SlideId prevSlideId = null;
     foreach (SlideId slideId in slideIdList.ChildElements)
     {
          var part = presentationPart.GetPartById(slideId.RelationshipId);

           if (part == slidePart)
           {
               prevSlideId = slideId;
           }
           if (slideId.Id > maxSlideId)
           {
              maxSlideId = slideId.Id;
           }
      }
      maxSlideId++;
      //Add the new slide at the end of the deck.
      SlideId newSlideId = slideIdList.InsertAfter(new SlideId(), prevSlideId);
      //Make sure the id and relid are set appropriately.

      newSlideId.Id = maxSlideId;

      newSlideId.RelationshipId = presentationPart.GetIdOfPart(newSlidePart);
      newSlidePart.Slide.Save();

      presentationPart.Presentation.Save();
      return newSlidePart;
}