Adobe PDF格式已經變成很多機構和公司進行跨平台制表的通用媒體格式。盡管我不是這個產品的狂熱癡迷者，卻不得不接受這樣一個事實：用這個格式產生一個協定可能會比用Word還要好。
PDF的全稱為Portable document．nbspFormat，即可移植文檔格式，由廣泛應用於專業打印領域的Postscript解釋語言演化而來。為了使PDF迅速得到推廣，Adobe不僅公開了技術規范，而且還免費向用戶提供可以顯示和打印PDF文件的Adobe Acrobat應用軟件。
PDF最大的優勢就在於其良好的一致性。PDF文檔一旦創建之後，無論是在任何系統或打印設備上，都可以完好的保持最初的頁面設計樣式和風格，不會發生任何變化。正是由於PDF文檔在格式上的一貫性，使得越來越多的網站開始提供基於PDF格式的文件和說明，從簡單的宣傳手冊到完整的電子圖書，PDF越來越受到人們的喜愛和重視。
事實上，除了可以用於靜態信息顯示之外，我們還可以通過WEB腳本程序直接直接以PDF文檔形式輸出，不再僅僅局限於傳統的HTML頁面。
下面就用C# Builder生成一個簡單的PDF文件：
首先，打開C# Builder，File-＞New-＞C# Application，Name這裡我們設為"MKPDF"。
代碼如下：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.IO;
using System.Text;
namespace MKPDF
{
/// ＜summary＞
/// Application : Generation of PDF file from text
/// Author : Pramod Kumar Singh
/// Date : 25th July 2001
///＜/summary＞
/// ＜summary＞
/// Summary description for WinForm.
/// ＜/summary＞
public class WinForm : System.Windows.Forms.Form
{
/// ＜summary＞
/// Required designer variable.
/// ＜/summary＞
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;
//Create a PDF file.
//PDF on Disk
static StreamWriter pPDF=new StreamWriter("E:\\myPDF.pdf");
//PDF in Memory
static MemoryStream mPDF= new MemoryStream();
//Convert the Text Data to PDF format and write back to
//Memory Stream
static void ConvertToByteAndAddtoStream(string strMsg)
{
Byte[] buffer=null;
buffer=ASCIIEncoding.ASCII.GetBytes(strMsg);
mPDF.Write(buffer,0,buffer.Length);
buffer=null;
}
//Format the data length in xRef Format
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;
}
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Button button1;
public WinForm()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
}
/// ＜summary＞
/// Clean up any resources being used.
/// ＜/summary＞
protected override void Dispose (bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// ＜summary＞
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// ＜/summary＞
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(64, 72);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(136, 32);
this.button1.TabIndex = 0;
this.button1.Text = "生成PDF";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// WinForm
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(272, 181);
this.Controls.Add(this.button1);
this.Name = "WinForm";
this.Text = "WinForm";
this.ResumeLayout(false);
}
#endregion
/// ＜summary＞
/// The main entry point for the application.
/// ＜/summary＞
[STAThread]
static void Main()
{
Application.Run(new WinForm());
}
private void button1_Click(object sender, System.EventArgs e)
{
//Create a ArrayList for xRefs of PDF document． ArrayList xRefs=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);
//ID 1 For Containt
//ID 2 For Length of the Stream
//write the Text
//1＞ Start a new Page
xRefs.Add(mPDF.Length);
strPDFMessage="1 0 obj\n";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="＜＜ /Length 2 0 R ＞＞\n";
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage="stream\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//Get the start of the stream
////////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);
//Add the text data to the PDF memory stream
//實體內容
strPDFMessage= "(這是一個PDF文件)Tj\n"
ConvertToByteAndAddtoStream(strPDFMessage);
strPDFMessage= "ET\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//Get the End of the stream
streamEnd=mPDF.Length;
//Get the Length of the stream
streamLen=streamEnd-streamStart;
strPDFMessage= "endstream\nendobj\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//PDF文檔的版本信息
//Add 2 object to xRef
xRefs.Add(mPDF.Length);
strPDFMessage="2 0 obj\n"+ streamLen + "\nendobj\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//Add Page to xRefs
xRefs.Add(mPDF.Length);
strPDFMessage="3 0 obj\n＜＜/Type/Page/Parent 4 0 R/Contents 1 0 R＞＞\nendobj\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//Build the Pages
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);
//Add font to xRefs
xRefs.Add(mPDF.Length);
strPDFMessage="5 0 obj\n＜＜/Type/Font/Subtype/Type1/BaseFont/Courier/Encoding/WinAnsiEncoding＞＞\nendobj\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//Add the catalog to xRefs
xRefs.Add(mPDF.Length);
strPDFMessage="6 0 obj\n＜＜/Type/Catalog/Pages 4 0 R＞＞\nendobj\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//xRefs Entry
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);
//Trailer for the PDF
strPDFMessage="trailer\n＜＜\n/Size "+ (xRefs.Count+1)+"\n/Root 6 0 R\n＞＞\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//xRef location entry
strPDFMessage="startxref\n" + streamStart+"\n%%EOF\n";
ConvertToByteAndAddtoStream(strPDFMessage);
//Write the PDF from Memory Stream to File Stream
mPDF.WriteTo(pPDF.BaseStream);
//Close the Stream
mPDF.Close();
pPDF.Close();
}
}
}按F9運行程序，點“生成PDF”按鈕試試。注：以上代碼是網上copy來的，有興趣的可以研究研究。
