以iTextSharp形式编辑PdfCell

Question

我正在从iTextSharp创建PdfTable，但包含此表的pdf不允许在其单元格中进行编辑。

如何确保在生成的pdf中可以编辑单元格内容？

        iTextSharp.text.pdf.PdfPTable table = new iTextSharp.text.pdf.PdfPTable(columnsToAdd);
        table.HorizontalAlignment = 0; //0=Left, 1=Centre, 2=Right

        Font headerFont = new Font(Font.HELVETICA, 8f, Font.BOLD, Color.BLACK);
        Font bodyFont = new Font(Font.HELVETICA, 6f, Font.NORMAL, Color.BLACK);
        PdfPCell cEmpId = new PdfPCell(new Phrase("Emp ID", headerFont));
        PdfPCell cEmpAge = new PdfPCell(new Phrase("Emp Age", headerFont));


       table.AddCell(cEmpId);
       table.AddCell(cEmpAge);

       foreach(Child child in childData)
       {

         PdfPCell cellEmpID = new PdfPCell {FixedHeight = 10f};
         cellEmpID.Phrase = (new Phrase(child.Emp_ID.ToString(CultureInfo.InvariantCulture),
                          bodyFont));

         PdfPCell cellEmpAge = new PdfPCell {Phrase = (new Phrase(child.Emp_Age, bodyFont))};

         table.AddCell(cellEmpID);
         table.AddCell(cellEmpAge);
     }

编辑1： 根据Chris的回答，我将尝试以下代码，但目前还不确定。

       //WITHIN THE LOOP IN MY CODE ABOVE ADD THESE LINES FOR EVERY PDF CELL
       //Create our textfield, the rectangle that we're passing in is ignored and doesn't matter
        var tfEmpID = new TextField(writer, new iTextSharp.text.Rectangle(0, 0), child.Emp_ID);

        //Set the cell event to our custom IPdfPCellEvent implementation
        cellEmpID.CellEvent = new ChildFieldEvent(root, tfEmpID.GetTextField(), 1);

       //THEN OUTSIDE THE LOOP
       //IMPORTANT! Add the root annotation to the writer which also adds all of the child annotations
        writer.AddAnnotation(root);