Stamping text file in PDF pages

I wrote C# function that Stamping the content of text file (text and hyper links) at the front of the select pages (selected by the user) from the PDF .

NOTE :
This C# function stamp the text with aligning the text at the center of the selected pages ,the function based on the latest library called ItextCharp ( iTextSharp 4.0.8 (2008-01-25) .
Download the library from here

iText
# (iTextSharp) is a port of the iText open source java library written entirely in C# for the .NET platform.
iText is a library that allows you to generate PDF files on the fly. It is implemented as an assembly.

Parameter Example :

string sourcefile --> "input.pdf"
string SaveFileName--> "output.pdf"
float Y_space --> 405
float lead--> 25
float FontSize --> 12
string TxtFileName--> "textostamp.txt"
string _Font --> "HELVETICA"
string pagesRange --> "3,6,8" or "3-6,9-15"


you must to import this namespaces :)
using System.IO;
using iTextSharp.text.pdf;
using iTextSharp.text;
==

/* StamperTxt is a class which stamps the content of text file (text and hyper links)

* at the front of the select pages (selected by the user)from the PDF .

* */

public StamperTxt(string sourcefile, string SaveFileName, float Y_space, float lead, float FontSize, string TxtFileName, string _Font , string pagesRange)

{

PdfReader pdfreader = new PdfReader(sourcefile);

float pagewidth = pdfreader.GetPageSize(1).Width;

int j = pdfreader.NumberOfPages;

bool[] flag ;

flag = new bool[j];

for (int i = 0; i <>

flag[i] = false;

if ((pagesRange.Trim() == "all" )&&(pagesRange.IndexOf("-") == -1 )&&(pagesRange.IndexOf(",") == -1 ) )

{

for (int ii = 0; ii <>

flag[ii] = true;

}

else if ((pagesRange.IndexOf("-") != -1))

{

string[] tempArr = pagesRange.Trim().Split(',');

foreach (string str in tempArr)

{

string[] tempArrhyphen = str.Trim().Split('-');

int startIndex = 0, endIndex = 0;

startIndex =int.Parse(tempArrhyphen[0].Trim());

endIndex = int.Parse(tempArrhyphen[1].Trim());

for (int s = startIndex; s <= endIndex; s++)

{

flag[s-1] = true;

}

}

}

else if ((pagesRange.IndexOf(',') > -1))

{

string[] tempArr = pagesRange.Trim().Split(',');

foreach (string str in tempArr)

{

int index = int.Parse(str);

flag[index-1] = true;

}

}

PdfGState pdfgstate = new PdfGState();

pdfgstate.FillOpacity = 1.0f;

Stream output_stream = new FileStream(SaveFileName, FileMode.OpenOrCreate);

PdfStamper pdfstamper = new PdfStamper(pdfreader, output_stream);

for (int k = 0; k <>

{

if (flag[k] != true)

continue;

PdfContentByte pdfcontentbyte = pdfstamper.GetOverContent(k+1);

float v_space = Y_space;

pdfcontentbyte.SaveState();

pdfcontentbyte.SetGState(pdfgstate);

BaseFont PF = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.WINANSI, false) ;

pdfcontentbyte. SetFontAndSize(PF , FontSize);

StreamReader SR;

string S;

SR = File.OpenText(TxtFileName);

ArrayList chunklist = new ArrayList();

S = SR.ReadLine();

while (S != null)

{

Chunk chk = new Chunk(S + "\r\n", FontFactory.GetFont(_Font, FontSize, Font.NORMAL));

if (S.IndexOf("http:/") > -1)

{

chk = new Chunk(S + "\r\n", FontFactory.GetFont(_Font, FontSize, Font.UNDERLINE));

chk.SetAnchor(S);

}

chunklist.Add(chk);

S = SR.ReadLine();

}

//Console.WriteLine(S);

SR.Close();

Phrase PH = new Phrase();

PH.Font = FontFactory.GetFont(_Font, FontSize, Font.NORMAL);

PH.AddRange(chunklist);

PH.Leading = lead;

PdfPTable table = new PdfPTable(1);

table.DefaultCell.Border = Rectangle.NO_BORDER;

table.DefaultCell.SetLeading(lead, 0);

table.TotalWidth = pagewidth;

table.HorizontalAlignment = Rectangle.ALIGN_MIDDLE;

table.DefaultCell.HorizontalAlignment = Rectangle.ALIGN_MIDDLE;

table.HorizontalAlignment = Rectangle.ALIGN_CENTER;

table.DefaultCell.HorizontalAlignment = Rectangle.ALIGN_CENTER;

table.AddCell(PH);

table.WriteSelectedRows(0, -1,0, v_space, pdfcontentbyte);

}

byte[] arr = pdfstamper.Writer.XmpMetadata;

pdfstamper.Close();

pdfreader.Close();

Console.WriteLine(SaveFileName + "Was Created in Success...");

}////end Function