adding page numbers and creating landscape A4 in streams with itext - itext

Question

I have the following code that generates a pdf into the stream. This works well but i now have the following requirements.
1) make page landscape: Looking at other examples they add the property to the document object. But i'm doing this instream. So how would i add this property?
2) Add page numbers. I need to put items into a grid so that there are x number of rows per page. With a page number at the footer of the page. How can this kind of feature be acheived with Itext sharp.
public static void Create(ICollection<Part> parts, string path)
{
PdfReader reader = new PdfReader(path);
var pageWidth = 500;
byte[] bytes;
using (MemoryStream ms = new MemoryStream())
{
using (PdfStamper stamper = new PdfStamper(reader, ms))
{
PdfContentByte cb = stamper.GetOverContent(1);
//Flush the PdfStamper's buffer
stamper.Close();
//Get the raw bytes of the PDF
bytes = ms.ToArray();
var now = String.Format("{0:d-M-yyyy}", DateTime.Now);
var pdfName = string.Format("{0}_factory_worksheet", now).Replace("%", "").Replace(" ", "_");
var context = HttpContext.Current;
context.Response.ContentType = "application/pdf";
context.Response.AddHeader("content-disposition", "attachment;filename=" + pdfName);
context.Response.Buffer = true;
context.Response.Clear();
context.Response.OutputStream.Write(ms.GetBuffer(), 0, ms.GetBuffer().Length);
context.Response.OutputStream.Flush();
context.Response.End();
}
}
}

Answer 1

I don't really know how you handling it C# but logical flow will be like this:
Use PdfDictionary to rotate content in reader to 90 degree.Assuming your pdf contain multiple pages,
PdfReader reader = new PdfReader(path);
for (int pgCnt=1; pgCnt <= reader.getNumberOfPages(); pgCnt++) {
//Logic to implement rotation & Add Page number
}
To get current rotation(assuming you are using Portrait mode & try to convert it in landscape mode) use int rttnPg = reader.getPageRotation(pgCnt); also get the PdfDictionary of that page pgDctnry=reader.getPageN(i);(I named that variable as pgDctnry)
Now to rotate it in 90 degree use
pgDctnry.put(PdfName.ROTATE, new PdfNumber(rttnPg+90));
Now bind it using PdfStamper as you are currently doing it.Now to add page number get over content(here i named it pgCntntBt) of the current page
pgCntntBt = stamper .getOverContent(pgCnt);
rctPgSz = rdrPgr.getPageSizeWithRotation(pgCnt);
pgCntntBt.beginText();
bfUsed=//Base Font used for text to be displayed.Also set font size pgCntntBt.setFontAndSize(bfUsed,8.2f);
txtPg=String.format(pgTxt+" %d/%d",pgCnt,totPgCnt);
pgCntntBt.showTextAligned(2,txtPg,//Put Width,//Put Height,//Rotation);
pgCntntBt.endText();
Actually i don't understand what you mean by this:"I need to put items into a grid so that there are x number of rows per page. With a page number at the footer of the page".Now close the stamper to flush it in outputstream.