//
write by wenhui.org
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 ";
ConvertToByteAndAddtoStream(strPDFMessage);
xRefs.Add(mPDF.Length);
strPDFMessage="1 0 obj ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="<< /Length 2 0 R >> ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="stream ";
ConvertToByteAndAddtoStream(strPDFMessage);
/**/////PDF文档描述
streamStart=mPDF.Length;
//字体
strPDFMessage="BT /F0 " + fontSize +" Tf ";
ConvertToByteAndAddtoStream(strPDFMessage);
//PDF文档实体高度
yPos = pageDepth - pageMargin;
strPDFMessage=pageMargin + " " + yPos +" Td " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= leadSize+" TL " ;
ConvertToByteAndAddtoStream(strPDFMessage);
//实体内容
strPDFMessage= "(http://www.wenhui.org)Tj " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "ET ";
ConvertToByteAndAddtoStream(strPDFMessage);
streamEnd=mPDF.Length;
streamLen=streamEnd-streamStart;
strPDFMessage= "endstream endobj ";
ConvertToByteAndAddtoStream(strPDFMessage);
//PDF文档的版本信息
xRefs.Add(mPDF.Length);
strPDFMessage="2 0 obj "+ streamLen + " endobj ";
ConvertToByteAndAddtoStream(strPDFMessage);
xRefs.Add(mPDF.Length);
strPDFMessage="3 0 obj <</Type/Page/Parent 4 0 R/Contents 1 0 R>> endobj ";
ConvertToByteAndAddtoStream(strPDFMessage);
xRefs.Add(mPDF.Length);
strPDFMessage="4 0 obj <</Type /Pages /Count 1 ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="/Kids[ 3 0 R ] ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="/Resources<</ProcSet[/PDF/Text]/Font<</F0 5 0 R>> >> ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="/MediaBox [ 0 0 "+ pageWidth + " " + pageDepth + " ] >> endobj ";
ConvertToByteAndAddtoStream(strPDFMessage);
xRefs.Add(mPDF.Length);
strPDFMessage="5 0 obj <</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>> endobj ";
ConvertToByteAndAddtoStream(strPDFMessage);
xRefs.Add(mPDF.Length);
strPDFMessage="6 0 obj <</Type/Catalog/Pages 4 0 R>> endobj ";
ConvertToByteAndAddtoStream(strPDFMessage);
streamStart=mPDF.Length;
strPDFMessage="xref 0 7 0000000000 65535 f ";
for(int i=0;i<xRefs.Count;i++)
...{
strPDFMessage+=xRefFormatting((long) xRefs[i])+" 00000 n ";
}
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="trailer << /Size "+ (xRefs.Count+1)+" /Root 6 0 R >> ";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="startxref " + streamStart+" %%EOF ";
ConvertToByteAndAddtoStream(strPDFMessage);
mPDF.WriteTo(pPDF.BaseStream);
mPDF.Close();
pPDF.Close();
}
}
}