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();


}


}


}