用C#实现生成PDF文档

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(); 
} 
}