[英]c# extraction of images from .pptx file
我有以下代码用于从.pptx文件提取图像:
public static void GetImages()
{
var doc = PresentationDocument.Open(@"D:\Peak Sourcing\Work\ppt_test\xx.pptx", true);
var presentationPart = doc.PresentationPart;
var slidePart = presentationPart.GetPartsOfType<SlidePart>().First();
var imagePart = slidePart.GetPartsOfType<ImagePart>().First();
var stream = imagePart.GetStream();
var img = Image.FromStream(stream);
img.Save(@"D:\Peak Sourcing\Work\ppt_test\test-output.png");
}
该代码有效,但仅从.ppt文件中提取了一些随机图像。 如何按顺序提取所有图像?
看起来它不是随机图像,而是第一个图像。 尝试使用foreach循环遍历presentationPart.GetPartsOfType<SlidePart>()
和slidePart.GetPartsOfType<ImagePart>()
。
编辑:
这是所有图像的工作代码。 它生成随机文件名:
public static void GetImages()
{
var doc = PresentationDocument.Open(@"E:\Dev\Stuff\ConsoleApplication1\ConsoleApplication1\bin\Debug\test.pptx", true);
var presentationPart = doc.PresentationPart;
foreach (var slide in presentationPart.GetPartsOfType<SlidePart>())
{
foreach (var image in slide.GetPartsOfType<ImagePart>())
{
if (image != null)
{
var stream = image.GetStream();
var img = Image.FromStream(stream);
img.Save(@"E:\Dev\Stuff\ConsoleApplication1\ConsoleApplication1\bin\Debug\" + System.IO.Path.ChangeExtension(System.IO.Path.GetRandomFileName(), "jpg"));
}
}
}
}
我做了一些手动迭代,但是同样,我没有得到想要的图像。 在此示例中,它应该从第六张幻灯片中返回第一张图像,但从另一张幻灯片中返回一些其他图像:
public static void GetImages()
{
var doc = PresentationDocument.Open(@"D:\Peak Sourcing\Work\ppt_test\xx.pptx", true);
var presentationPart = doc.PresentationPart;
int number_of_slides = presentationPart.GetPartsOfType<SlidePart>().Count(); //get number of slides in .ppt
var slidePart = presentationPart.GetPartsOfType<SlidePart>().ElementAt(5); //look for image inside this slide number + 1
int number_of_images = slidePart.GetPartsOfType<ImagePart>().Count(); //get number of images in current slide
var imagePart = slidePart.GetPartsOfType<ImagePart>().ElementAt(0); //should return first image of selected slide, but it doesn't....it returns an image from some other slide
var stream = imagePart.GetStream();
var img = Image.FromStream(stream);
img.Save(@"D:\Peak Sourcing\Work\ppt_test\test-output.jpg");
}
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