iTextSharp.text.pdf.PdfWriter.AddASEvent C# (CSharp) Méthode

        private void AddASEvent(PdfName eventa, PdfName category)
        {
            PdfArray arr = new PdfArray();
            foreach (PdfLayer layer in documentOCG.Keys) {
                PdfDictionary usage = layer.GetAsDict(PdfName.USAGE);
                if (usage != null && usage.Get(category) != null)
                    arr.Add(layer.Ref);
            }
            if (arr.Size == 0)
                return;
            PdfDictionary d = vOCProperties.GetAsDict(PdfName.D);
            PdfArray arras = d.GetAsArray(PdfName.AS);
            if (arras == null) {
                arras = new PdfArray();
                d.Put(PdfName.AS, arras);
            }
            PdfDictionary asa = new PdfDictionary();
            asa.Put(PdfName.EVENT, eventa);
            asa.Put(PdfName.CATEGORY, new PdfArray(category));
            asa.Put(PdfName.OCGS, arr);
            arras.Add(asa);
        }