// 完毕:
using System;
using System.IO;
using System.Drawing;
using System.Text;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Text;
using GrapeCity.Documents.Drawing;
using System.Linq;
namespace DsPdfWeb.Demos
{
// This demo shows how to remove images that have a certain aspect ratio
// (square, width same as height) from a PDF using the GcPdfDocument.RemoveImages() method.
public class RemoveSquareImages
{
public int CreatePDF(Stream stream)
{
using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "SlidePages.pdf"));
var doc= new GcPdfDocument();
doc.Load(fs);
// Get the list of images in the document:
var imageInfos = doc.GetImages();
// Remove non-square images from the list:
for (int i = imageInfos.Count - 1; i >= 0; i--)
{
if (imageInfos[i].Image.Width != imageInfos[i].Image.Height)
imageInfos.RemoveAt(i);
}
// Remove images left in the list from the PDF:
doc.RemoveImages(imageInfos);
// 完毕:
doc.Save(stream);
return doc.Pages.Count;
}
}
}