iTextSharp.text.pdf.PdfStamperImp.AddFileAttachments C# (CSharp) Метод

        protected void AddFileAttachments()
        {
            Dictionary<string,PdfObject> fs = pdf.GetDocumentFileAttachment();
            if (fs.Count == 0)
                return;
            PdfDictionary catalog = reader.Catalog;
            PdfDictionary names = (PdfDictionary)PdfReader.GetPdfObject(catalog.Get(PdfName.NAMES), catalog);
            if (names == null) {
                names = new PdfDictionary();
                catalog.Put(PdfName.NAMES, names);
                MarkUsed(catalog);
            }
            MarkUsed(names);
            Dictionary<string,PdfObject> old = PdfNameTree.ReadTree((PdfDictionary)PdfReader.GetPdfObjectRelease(names.Get(PdfName.EMBEDDEDFILES)));
            foreach (KeyValuePair<string,PdfObject> entry in fs) {
                String name = entry.Key;
                int k = 0;
                StringBuilder nn = new StringBuilder(name);
                while (old.ContainsKey(nn.ToString())) {
                    ++k;
                    nn.Append(' ').Append(k);
                }
                old[nn.ToString()] = entry.Value;
            }
            PdfDictionary tree = PdfNameTree.WriteTree(old, this);
            // Remove old EmbeddedFiles object if preset
            PdfObject oldEmbeddedFiles = names.Get(PdfName.EMBEDDEDFILES);
            if (oldEmbeddedFiles != null) {
                PdfReader.KillIndirect(oldEmbeddedFiles);
            }

            // Add new EmbeddedFiles object
            names.Put(PdfName.EMBEDDEDFILES, AddToBody(tree).IndirectReference);
        }