I have the following code for image extraction from .pptx file:
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");
}
The code works, but is extracts just some random image from .ppt file. How to extract all images in order?
Looks like it is not a random image but the first one. Try to iterate over presentationPart.GetPartsOfType<SlidePart>()
and slidePart.GetPartsOfType<ImagePart>()
using foreach loop.
edit:
here is working code for all images. it generates random file name:
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"));
}
}
}
}
I did some manual iteration, but again, I do not get intended image. In this example, it should return the first image from 6th slide, but it returns some other image from a different slide:
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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