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用C#實現生成PDF文檔

系統 2422 0
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 StreamWriterpPDF = new StreamWriter( " E:\\myPDF.pdf " );

static MemoryStreammPDF = 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 )
{
StringBuilders
= new StringBuilder();
int i = 10 - iLen;
s.Append(
' 0 ' ,i);
strMsg
= s.ToString() + strMsg;
}

return strMsg;
}


static void Main( string []args)
{
ArrayListxRefs
= new ArrayList();
// Byte[]buffer=null;
float yPos = 0f;
long streamStart = 0 ;
long streamEnd = 0 ;
long streamLen = 0 ;
string strPDFMessage = null ;
// PDF文檔頭信息
strPDFMessage = " %PDF-1.1\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

xRefs.Add(mPDF.Length);
strPDFMessage
= " 10obj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= " <</Length20R>>\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= " stream\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
/**/ ////// //PDF文檔描述
streamStart = mPDF.Length;
// 字體
strPDFMessage = " BT\n/F0 " + fontSize + " Tf\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
// PDF文檔實體高度
yPos = pageDepth - pageMargin;
strPDFMessage
= pageMargin + " " + yPos + " Td\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= leadSize + " TL\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

// 實體內容
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文檔的版本信息
xRefs.Add(mPDF.Length);
strPDFMessage
= " 20obj\n " + streamLen + " \nendobj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

xRefs.Add(mPDF.Length);
strPDFMessage
= " 30obj\n<</Type/Page/Parent40R/Contents10R>>\nendobj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

xRefs.Add(mPDF.Length);
strPDFMessage
= " 40obj\n<</Type/Pages/Count1\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= " /Kids[\n30R\n]\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= " /Resources<</ProcSet[/PDF/Text]/Font<</F050R>>>>\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= " /MediaBox[00 " + pageWidth + " " + pageDepth + " ]\n>>\nendobj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

xRefs.Add(mPDF.Length);
strPDFMessage
= " 50obj\n<</Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding>>\nendobj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

xRefs.Add(mPDF.Length);
strPDFMessage
= " 60obj\n<</Type/Catalog/Pages40R>>\nendobj\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

streamStart
= mPDF.Length;
strPDFMessage
= " xref\n07\n000000000065535f\n " ;
for ( int i = 0 ;i < xRefs.Count;i ++ )
{
strPDFMessage
+= xRefFormatting(( long )xRefs[i]) + " 00000n\n " ;
}

ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage
= " trailer\n<<\n/Size " + (xRefs.Count + 1 ) + " \n/Root60R\n>>\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);

strPDFMessage
= " startxref\n " + streamStart + " \n%%EOF\n " ;
ConvertToByteAndAddtoStream(strPDFMessage);
mPDF.WriteTo(pPDF.BaseStream);

mPDF.Close();
pPDF.Close();
}

}

}
轉自: http://goaler.xicp.net/Article/ShowArticle.asp?ID=559

用C#實現生成PDF文檔


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