itextsharp change margins no document.SetPageSize - itext

Question

I added the function below to change the margins for the page
at every page change.
I found the forum a method that sets the size of the page:
document.SetPageSize (New Rectangle (36.0F, 36.0F, 52.0F, PageFooter.TotalHeight))
But I do not want to change the size of the page, but those margins.
thanks
public override void OnEndPage(PdfWriter writer, Document document)
{
try
{
DataSet dsReport = new DataSet();
foreach (DataSet obj in report.arrayDs)
{
dsReport = obj;
break;
}
Single topMargin = 0;
if (document.PageNumber != 1)
{
if (report.repeatHead) //ripete l'intestazione del report su tutte le pagine di stampa
{
repeatHead(writer, document);
topMargin = 60;
}
else
{
if (document.PageNumber == 2) //ripete l'intestazione del report solo sulla second pagina dopo la copertina
{
repeatHead(writer, document);
topMargin = 60;
}
else
{
topMargin = Convert.ToSingle(dsReport.Tables["REPORT_STYLE"].Rows[0]["topMargin"]) * 10;
}
}
document.SetMargins(Convert.ToSingle(dsReport.Tables["REPORT_STYLE"].Rows[0]["leftMargin"]) * 10,
Convert.ToSingle(dsReport.Tables["REPORT_STYLE"].Rows[0]["rightMargin"]) * 10,
topMargin,
Convert.ToSingle(dsReport.Tables["REPORT_STYLE"].Rows[0]["bottomMargin"]) * 10);
}
}
catch
{ throw; }
}

Answer 1

Based on your clarification in the comments, you want the top margin of the first page to be 60 and the top margin of the second page to be 0.
This is shown in the following screen shot:
The Java code to achieve this looks like this:
public void createPdf(String dest) throws IOException, DocumentException {
float left = 30;
float right = 30;
float top = 60;
float bottom = 0;
Document document = new Document(PageSize.A4, left, right, top, bottom);
PdfWriter.getInstance(document, new FileOutputStream(dest));
document.open();
document.setMargins(left, right, 0, bottom);
for (int i = 0; i < 60; i++) {
document.add(new Paragraph("This is a test"));
}
document.close();
}
If you want to port this to C#, you need to change some lower cases into upper cases. You already knew most of the methods, for instance: I see document.SetMargins(...) in your page event.