using System;  
  using System.IO;  
  using System.Text;  
  using System.Collections;  
    
  namespace PDFGenerator  
  {  
    
  public class PDFGenerator  
  {  
  static float pageWidth = 594.0f;  
  static float pageDepth = 828.0f;  
  static float pageMargin = 30.0f;  
  static float fontSize = 20.0f;  
  static float leadSize = 10.0f;  
    
    
  static StreamWriter pPDF=new StreamWriter("E:\\myPDF.pdf");  
    
  static MemoryStream mPDF= new MemoryStream();  
    
  static void ConvertToByteAndAddtoStream(string strMsg)  
  {  
  Byte[] buffer=null;  
  buffer=ASCIIEncoding.ASCII.GetBytes(strMsg);  
  mPDF.Write(buffer,0,buffer.Length);  
  buffer=null;  
  }  
    
  static string xRefFormatting(long xValue)  
  {  
  string strMsg =xValue.ToString();  
  int iLen=strMsg.Length;  
  if (iLen<10)  
  {  
  StringBuilder s=new StringBuilder();  
  int i=10-iLen;  
  s.Append('0',i);  
  strMsg=s.ToString() + strMsg;  
  }  
  return strMsg;  
  }  
    
  static void Main(string[] args)  
  {  
  ArrayList xRefs=new ArrayList();  
  //Byte[] buffer=null;  
  float yPos =0f;  
  long streamStart=0;  
  long streamEnd=0;  
  long streamLen =0;  
  string strPDFMessage=null;  
  //PDF文档头信息  
  strPDFMessage="%PDF-1.1\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  xRefs.Add(mPDF.Length);  
  strPDFMessage="1 0 obj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage="<< /Length 2 0 R >>\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage="stream\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  /**//**//**/////////PDF文档描述  
  streamStart=mPDF.Length;  
  //字体  
  strPDFMessage="BT\n/F0 " + fontSize +" Tf\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  //PDF文档实体高度  
  yPos = pageDepth - pageMargin;  
  strPDFMessage=pageMargin + " " + yPos +" Td\n" ;  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage= leadSize+" TL\n" ;  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  //实体内容  
  strPDFMessage= "(http://www.wenhui.org)Tj\n" ;  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage= "ET\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  streamEnd=mPDF.Length;  
    
  streamLen=streamEnd-streamStart;  
  strPDFMessage= "endstream\nendobj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  //PDF文档的版本信息  
  xRefs.Add(mPDF.Length);  
  strPDFMessage="2 0 obj\n"+ streamLen + "\nendobj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  xRefs.Add(mPDF.Length);  
  strPDFMessage="3 0 obj\n<</Type/Page/Parent 4 0 R/Contents 1 0 R>>\nendobj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  xRefs.Add(mPDF.Length);  
  strPDFMessage="4 0 obj\n<</Type /Pages /Count 1\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage="/Kids[\n3 0 R\n]\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage="/Resources<</ProcSet[/PDF/Text]/Font<</F0 5 0 R>> >>\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage="/MediaBox [ 0 0 "+ pageWidth + " " + pageDepth + " ]\n>>\nendobj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  xRefs.Add(mPDF.Length);  
  strPDFMessage="5 0 obj\n<</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>\nendobj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  xRefs.Add(mPDF.Length);  
  strPDFMessage="6 0 obj\n<</Type/Catalog/Pages 4 0 R>>\nendobj\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  streamStart=mPDF.Length;  
  strPDFMessage="xref\n0 7\n0000000000 65535 f \n";  
  for(int i=0;i<xRefs.Count;i++)  
  {  
  strPDFMessage+=xRefFormatting((long) xRefs[i])+" 00000 n \n";  
  }  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  strPDFMessage="trailer\n<<\n/Size "+ (xRefs.Count+1)+"\n/Root 6 0 R\n>>\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
    
  strPDFMessage="startxref\n" + streamStart+"\n%%EOF\n";  
  ConvertToByteAndAddtoStream(strPDFMessage);  
  mPDF.WriteTo(pPDF.BaseStream);  
    
  mPDF.Close();  
  pPDF.Close();  
  }  
  }  
  }