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);  
   /**/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://)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();  
   }  
   }  
   }