如何使用 MS Open XML SDK 从 .pptx 文件检索图像？

我开始尝试适用于 Microsoft Office 的开放 XML SDK 2.0.

我目前可以执行某些操作，例如检索每张幻灯片中的所有文本并获取演示文稿的大小。例如，我这样做是后者：

using (var doc = PresentationDocument.Open(pptx_filename, false)) {
     var presentation = doc.PresentationPart.Presentation;

     Debug.Print("width: " + (presentation.SlideSize.Cx / 9525.0).ToString());
     Debug.Print("height: " + (presentation.SlideSize.Cy / 9525.0).ToString());
}

现在我想检索给定幻灯片中的嵌入图像。有谁知道如何做到这一点或者可以向我指出一些有关该主题的文档？

首先你需要抓住SlidePart您想从其中获取图像：

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

    // Get the number of slides in the presentation
    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;

    // Verify that the presentation part and presentation exist.
    if (presentationPart != null && presentationPart.Presentation != null)
    {
        Presentation presentation = presentationPart.Presentation;

        if (presentation.SlideIdList != null)
        {
            // Get the collection of slide IDs from the slide ID list.
            var slideIds = presentation.SlideIdList.ChildElements;

            if (slideIndex < slideIds.Count)
            {
               // Get the relationship ID of the slide.
               string slidePartRelationshipId = (slideIds[slideIndex] as SlideId).RelationshipId;

                // Get the specified slide part from the relationship ID.
                SlidePart slidePart = (SlidePart)presentationPart.GetPartById(slidePartRelationshipId);

                 return slidePart;
             }
         }
     }

     // No slide found
     return null;
}

然后你需要搜索Picture对象，其中将包含您根据图像的文件名查找的图像：

Picture imageToRemove = slidePart.Slide.Descendants<Picture>().SingleOrDefault(picture => picture.NonVisualPictureProperties.OuterXml.Contains(imageFileName));