ExtractImages disposal

Question

When you call ExtractImages on a PdfPage, it returns an array of Disposable Images:

https://help.syncfusion.com/cr/file-formats/Syncfusion.Pdf.PdfPageBase.html#Syncfusion_Pdf_PdfPageBase_ExtractImages

Who owns these images? Does the calling application need to Dispose of them? Or does Syncfusion manage them when you Dispose the parent PDF?

Gowthamraj Kumar · Answer

Hi Joshua Busch,We are checking on this and we will update the further
information on June 1st 2022.Regards,Gowthamraj K

Gowthamraj Kumar · Answer

Hi Joshua Busch,Yes. The calling application need to dispose the extracted images
using Dispose method. Please refer the below code snippet for disposing the
image,

Stream stream = new FileStream(@"D:\Data\PDF\HTTP
  Succinctly.pdf", FileMode.Open);
              PdfLoadedDocument loadedDocument
  = new PdfLoadedDocument(stream);
             
              Image[] images = null;
   
              for (int i = 0; i <
  loadedDocument.Pages.Count; i++)
              {
                  images = null;
   
                  //Get the page 
                  PdfLoadedPage page =
  loadedDocument.Pages[i] as PdfLoadedPage;
   
                  //Extract images 
                  images =
  page.ExtractImages();
                 
                  for (int j = 0; j < images.Length; j++)
                  {
                      //Save the image to memory stream
                      MemoryStream imageStream
  = new MemoryStream();
                     
  images[j].Save(imageStream, ImageFormat.Png);
                    
                      //Save the image to local file
                      imageStream.Position = 0;
                      FileStream outStream =
  System.IO.File.OpenWrite("../../../Test" + i.ToString()+ "_"+j.ToString() + ".png");
                     
  imageStream.WriteTo(outStream);
                      outStream.Flush();
                      imageStream.Dispose();
                      images[j].Dispose();
                  }
              }

Please let us know if you need any further assistance in this.Regards,Gowthamraj K