Passing a parameter to an overridden OnEndPage method

c#, itext

Solution

To further add to what Bruno said, if you want to add additional information to your `PdfPageEventHelper` you can just add additional properties:

public class pdfPage : iTextSharp.text.pdf.PdfPageEventHelper
{           
    public int parametro { get; set; }
    public override void OnEndPage(PdfWriter writer, Document doc)
    {
        //...
    }
}

And then:

var page = new pdfPage();
page.parametro = 40;
pdfWriter.PageEvent = page;

Or just:

pdfWriter.PageEvent = new pdfPage() { parametro = 40 };

If you want to change this valid "per page", you're going to need to move your logic into this class instead of the calling body.

Problem

I need to pass a parameter to an overridden version of the "OnEndPage" method, when i declare the parameter i don't get any error but when i call the method it tells me that "cannot implicitly convert void to itextsharp.text.pdf.ipdfpageevent" This is my OnEndPage method: ``` public class pdfPage : iTextSharp.text.pdf.PdfPageEventHelper { public override void OnEndPage(PdfWriter writer, Document doc, int parametro) { PdfPTable headerTbl = new PdfPTable(1); headerTbl.TotalWidth = doc.PageSize.Width; Image logo = Image.GetInstance("logo.png"); logo.ScalePercent(42); PdfPCell cell = new PdfPCell(logo); cell.HorizontalAlignment = Element.ALIGN_LEFT; cell.PaddingRight = 52; cell.Border = 0; headerTbl.AddCell(cell); headerTbl.WriteSelectedRows(0, -1, 0, (doc.PageSize.Height - 10), writer.DirectContent); PdfPTable headerrow = new PdfPTable(7); headerrow.TotalWidth = 570f; headerrow.LockedWidth = true; headerrow.AddCell(new Phrase("TIPO DOCUMENTO", new Font(Font.FontFamily.HELVETICA, 6f))); headerrow.WriteSelectedRows(0, -1, 0, (doc.PageSize.Height - 50), writer.DirectContent); } } ``` and this is how i am calling it: ``` var doc = new Document(PageSize.A4, 10, 10, 170, 10); pdfPage page = new pdfPage(); PdfWriter pdfWriter = PdfWriter.GetInstance(doc, new FileStream( "test.pdf", FileMode.Create)); pdfWriter.PageEvent = page.OnEndPage(pdfWriter, doc, 1234); ```

Original source