用C#实现生成PDF文档（原码）

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用C#实现生成PDF文档（原码）

  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);

  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();
  }
  }
  }