我开始尝试使用Open XML SDK 2.0 for Microsoft Office。
我目前能够执行某些操作,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,我用这种方式做后者:
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());
}
现在我想在给定的幻灯片中检索嵌入的图像。有没有人知道如何做到这一点,或者可以指向我关于这个主题的一些文档?
答案 0 :(得分:1)
首先,您需要抓住要从中获取图像的SlidePart
:
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,您需要根据图像的文件名搜索包含您要查找的图像的Picture
对象:
Picture imageToRemove = slidePart.Slide.Descendants<Picture>().SingleOrDefault(picture => picture.NonVisualPictureProperties.OuterXml.Contains(imageFileName));
答案 1 :(得分:-1)
从Openxml格式获取图片的最简单方法:
使用任何zip存档库从pptx文件的媒体文件夹中提取图像。这将包含文档中的图像。同样,您可以手动将扩展名.pptx替换为.zip并解压缩以从媒体文件夹中获取图像。
希望这有帮助。