从.PPTX文件打开XML获取图像

问题描述

我有一个Windows在.NET 4.0中窗体应用程序。我在C＃中工作。
我想从一个.PPTX文件中给定的幻灯片抓取的图像

I have a Windows forms app in .Net 4.0. I work in C#.I want to grab an image from a given slide in a .pptx file.

此代码获取幻灯片上的每一个形象：

This code gets every image on the slide:

 public static SlidePart GetSlidePart(PresentationDocument presentationDocument, int slideIndex)
    {
        if (presentationDocument == null)
        {
            throw new ArgumentNullException("presentationDocument", "GetSlidePart Method: parameter presentationDocument is null");
        }

        int slidesCount = CountSlides(presentationDocument);

        if (slideIndex < 0 || slideIndex >= slidesCount)
        {
            throw new ArgumentOutOfRangeException("slideIndex", "GetSlidePart Method: parameter slideIndex is out of range");
        }

        PresentationPart presentationPart = presentationDocument.PresentationPart;

        if (presentationPart != null && presentationPart.Presentation != null)
        {
            Presentation presentation = presentationPart.Presentation;

            if (presentation.SlideIdList != null)
            {
                var slideIds = presentation.SlideIdList.ChildElements;

                if (slideIndex < slideIds.Count)
                {
                    string slidePartRelationshipId = (slideIds[slideIndex] as SlideId).RelationshipId;

                    SlidePart slidePart = (SlidePart)presentationPart.GetPartById(slidePartRelationshipId);

                    return slidePart;
                }
            }
        }

        return null;// No slide found
    }

不过，如何slidePart转换，这将显示在我的Windows窗体（在图像列表或类似的东西）？

But, how to convert slidePart to an image which will be shown in my Windows form (in imageList or something similar)?

推荐答案

找到了一个方法：

SlidePart slidePart = (SlidePart)presentationPart.GetPartById(slidePartRelationshipId);

                    Slide slide = slidePart.Slide;
                    ImagePart imagePart = (ImagePart)slide.SlidePart.GetPartById("rId3");
                    System.Drawing.Image img = System.Drawing.Image.FromStream(imagePart.GetStream());

这篇关于从.PPTX文件打开XML获取图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！