用C#实现生成PDF文档

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 PDFGenerator
{
///<summary>
/// Form1 的摘要说明。
///</summary>
publicclass Form1 : System.Windows.Forms.Form
{
///<summary>
/// 必需的设计器变量。
///</summary>
private System.ComponentModel.Container components =null;

public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();

//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}

///<summary>
/// 清理所有正在使用的资源。
///</summary>
protectedoverridevoid Dispose( bool disposing )
{
if( disposing )
{
if (components !=null) 
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows 窗体设计器生成的代码
///<summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
///</summary>
privatevoid InitializeComponent()
{
this.components =new System.ComponentModel.Container();
this.Size =new System.Drawing.Size(300,300);
this.Text ="Form1";
}
#endregion


staticfloat pageWidth =594.0f; 
staticfloat pageDepth =828.0f; 
staticfloat pageMargin =30.0f; 
staticfloat fontSize =20.0f; 
staticfloat leadSize =10.0f; 


static StreamWriter pPDF=new StreamWriter("E:\\myPDF.pdf"); 

static MemoryStream mPDF=new MemoryStream(); 

staticvoid ConvertToByteAndAddtoStream(string strMsg) 
{ 
Byte[] buffer=null; 
buffer=ASCIIEncoding.ASCII.GetBytes(strMsg); 
mPDF.Write(buffer,0,buffer.Length); 
buffer=null; 
} 

staticstring 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; 
} 

staticvoid 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(); 
}
}//form
}