Question

我有以下代码从.pptx文件中提取图像：

// Top-level build file where you can add configuration options common to all sub-projects/modules.

buildscript {
    repositories {
        jcenter()
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.2.3'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
        mavenCentral()
    }
}

代码有效，但只从.ppt文件中提取一些随机图像。如何按顺序提取所有图像？

Answer 1

看起来它不是随机图像，而是第一个。尝试使用foreach循环迭代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"));
                }
            }
        }
    }

Answer 2

我做了一些手动迭代，但同样，我没有得到预期的图像。在这个例子中，它应该从第6张幻灯片返回第一张图片，但它会从不同的幻灯片返回一些其他图片：

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");

        }

c＃从.pptx文件中提取图像

2 个答案: