C＃ - OpenXML SDK 2.5 - 使用包含图像的布局从幻灯片母版插入新幻灯片

2 回答

• 2

  我认为你应该省略复制图像部分的 foreach 循环 . 当我通常从slidemaster复制幻灯片时，我使用的是您正在使用的类似代码设置，但没有 foreach . 然后它从slidemaster部分复制给定的幻灯片，包括所有图像，布局等 .

  我在我的一个项目中使用的代码如下所示（ SetTitle(string) 调用是外部方法，我在SlideMasterPart中使用硬编码位置而不是基于 string 的布局名称 .

  public static void InsertNewSlideB(PresentationDocument presentationDocument, int position, string slideTitle)
  {
      if (presentationDocument == null)
      {
          throw new ArgumentNullException("presentationDocument");
      }
  
      if (slideTitle == null)
      {
         throw new ArgumentNullException("slideTitle");
      }
  
      PresentationPart presentationPart = presentationDocument.PresentationPart;
  
      // Verify that the presentation is not empty.
      if (presentationPart == null)
      {
          throw new InvalidOperationException("The presentation document is empty.");
      }
  
      // Declare and instantiate a new slide.
      Slide slide = new Slide(new CommonSlideData(new ShapeTree()));
  
      SlidePart slidePart = presentationPart.AddNewPart<SlidePart>();
      slide.Save(slidePart);
  
      SlideLayoutPart layoutPart = presentationPart.SlideMasterParts.ElementAt(0).SlideLayoutParts.ElementAt(1);
      slidePart.AddPart<SlideLayoutPart>(layoutPart);
  
      slidePart.Slide.CommonSlideData = (CommonSlideData)layoutPart.SlideLayout.CommonSlideData.Clone();
  
      SetTitle(slidePart, slideTitle);
  
      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;
          }
  
          position--;
          if (position == 0)
          {
              prevSlideId = slideId;
          }
      }
  
      maxSlideId++;
  
      // Insert the new slide into the slide list after the previous slide.
      SlideId newSlideId = slideIdList.InsertAfter(new SlideId(), prevSlideId);
      newSlideId.Id = maxSlideId;
      newSlideId.RelationshipId = presentationPart.GetIdOfPart(slidePart);
  
      // Save the modified presentation.
      presentationPart.Presentation.Save();
  }
  

  回复于 2024-04-29T02:56:29+08:00
• 2

  多年以后，但为了帮助他人 - 没有必要将不提供占位符功能的节点复制到基于主幻灯片模板（包括图像）的新幻灯片 .

  这条线

  using (Stream stream = slideLayoutPart.GetStream())
  {
      slidePart.SlideLayoutPart.FeedData(stream);
  

  显然假设你没有在1个工作流中添加幻灯片（也就是说你有单独的读写流）和等效的行

  slidePart.Slide.CommonSlideData = (CommonSlideData)layoutPart.SlideLayout.CommonSlideData.Clone();
  

  这两行代码都将所有主数据作为叠加层复制到新幻灯片上 . 例如，运行上面答案中的一个代码块，在演示文稿管理器中打开生成的.pptx文件并删除您看到的任何形状 - 您将注意到每个项目都位于相同副本的顶部（主幻灯片）你不能删除的版本） . 因此，此方法不必要地使文件膨胀，并使得.pptx处理混乱而不是最终用户的预测 .

  下面的代码正在工作，包括图像

  public static SlidePart AppendNewSlide(PresentationPart presentationPart, SlideLayoutPart masterLayoutPart, out IEnumerable<Shape> placeholderShapes)
  {
      Slide clonedSlide = new Slide() {
          ColorMapOverride = new ColorMapOverride {
              MasterColorMapping = new Draw.MasterColorMapping()
          }
      };
  
      SlidePart clonedSlidePart = presentationPart.AddNewPart<SlidePart>();
      clonedSlidePart.Slide = clonedSlide;
      clonedSlidePart.AddPart(masterLayoutPart);
      clonedSlide.Save(clonedSlidePart);
  
      var masterShapeTree = masterLayoutPart.SlideLayout.CommonSlideData.ShapeTree;
  
      placeholderShapes = (from s in masterShapeTree.ChildElements<Shape>()
                             where s.NonVisualShapeProperties.OfType<ApplicationNonVisualDrawingProperties>().Any(anvdp=>anvdp.PlaceholderShape != null)
                             select new Shape()
                             {
                                 NonVisualShapeProperties = (NonVisualShapeProperties)s.NonVisualShapeProperties.CloneNode(true),
                                 TextBody = new TextBody(s.TextBody.ChildElements<Draw.Paragraph>().Select(p => p.CloneNode(true))) {
                                     BodyProperties = new Draw.BodyProperties(),
                                     ListStyle = new Draw.ListStyle()
                                 },
                                 ShapeProperties = new ShapeProperties()
                             }).ToList();
  
      clonedSlide.CommonSlideData = new CommonSlideData
      {
          ShapeTree = new ShapeTree(placeholderShapes) {
              GroupShapeProperties = (GroupShapeProperties)masterShapeTree.GroupShapeProperties.CloneNode(true),
              NonVisualGroupShapeProperties = (NonVisualGroupShapeProperties)masterShapeTree.NonVisualGroupShapeProperties.CloneNode(true)
          }
      };
  
      SlideIdList slideIdList = presentationPart.Presentation.SlideIdList;
  
      // Find the highest slide ID in the current list.
      uint maxSlideId = slideIdList.Max(c=>(uint?)((SlideId)c).Id) ?? 256;
  
      // Insert the new slide into the slide list after the previous slide.
      slideIdList.Append(new SlideId() {
          Id = ++maxSlideId,
          RelationshipId = presentationPart.GetIdOfPart(clonedSlidePart)
      });
      //presentationPart.Presentation.Save();
  
      return clonedSlidePart;
  }
  
  //helper method used above in separate static class
  public static IEnumerable<T> ChildElements<T>(this OpenXmlElement el) where T: OpenXmlElement
  {
      if (el.HasChildren)
      {
          var child = el.GetFirstChild<T>();
          while (child != null)
          {
              yield return child;
              child = child.NextSibling<T>();
          }
      }
  }
  

  out参数placeholderShapes在创建基于主模板的新幻灯片后假设开发人员希望更改某些占位符内容

  回复于 2024-04-29T02:56:29+08:00