C#编程简单实现生成PDF文档的方法示例

本文实例讲述了C#编程简单实现生成PDF文档的方法。分享给大家供大家参考，具体如下：

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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://HdhCmsTestwenhui.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();

     }

   }

}

希望本文所述对大家C#程序设计有所帮助。

dy("nrwz");

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