public void EditPDF()
{

try
{
PdfReader reader = new PdfReader(Path.Combine(Server.MapPath(“~/pdf”), “Doc.pdf”));
string sPdfName = Path.Combine(Server.MapPath(“~/pdf”), “Doc221.pdf”);
//int n = reader.GetPageSize();

PdfStamper stamp = new PdfStamper(reader, new FileStream(
sPdfName, FileMode.Create));

PdfContentByte over;
BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.EMBEDDED);

over = stamp.GetOverContent(1);
//over = stamp.getUnderContent(i);
/*Image img = Image.getInstance(“Blank.JPG”);
img.setAbsolutePosition(170, 279);
over.addImage(img);
*/
over.BeginText();
//over.setFontAndSize(bf, 18);
//over.setTextMatrix(30, 30);
//over.showText(“page ” + i);

over.SetFontAndSize(bf, 10);
FillCell(over, “xyzabc”, 280F, 692F);

over.EndText();

stamp.Close();
reader.Close();
return;

}
catch (Exception e)
{
//e.printStackTrace();
}

}

public void FillCell(PdfContentByte over,String sText,float x,float y)
{
try
{

//System.out.println(sText.length());

float fx=x;;
over.ShowTextAligned(1, sText, fx , y, 0f);
return;

}
catch(Exception e)
{
//e.printStackTrace();
}

}