spring.net框架开发合并PDF文件程序，请大家多提宝贵意见

using System;using System.Collections.Generic;using System.IO;using iTextSharp.text;using iTextSharp.text.pdf;using Spring.Objects.Factory.Attributes;using System.ComponentModel;using System.Windows.Forms;using System.Collections;namespace BLL{    /// <summary>    /// 支持多文件（PDF）合并    /// </summary>    public class PdfMerger : IPdfMerger    {        public string pdfCreatDir { get; set; }        public PictureBox pb { get; set; }        public Label Lb { get; set; }         private IPdfPageEvent _pdfPageEvent;        private string currentfileName=string.Empty;        [Required]        public IPdfPageEvent PdfPageEvent        {            get            {                return _pdfPageEvent;            }            set            {                _pdfPageEvent = value;            }        }        /// <summary>        /// Merge pdf files.        /// </summary>        /// <param name="sourceFiles">PDF files being merged.</param>        /// <returns></returns>        public byte[] GetByteFiles(List<byte[]> sourceFiles)        {            Document document = new Document();            MemoryStream output = new MemoryStream();            try            {                try                {                    // Initialize pdf writer                    PdfWriter writer = PdfWriter.GetInstance(document, output);                    writer.PageEvent = this.PdfPageEvent;                    // Open document to write                    document.Open();                    PdfContentByte content = writer.DirectContent;                    // Iterate through all pdf documents                    for (int fileCounter = 0; fileCounter < sourceFiles.Count; fileCounter++)                    {                        // Create pdf reader                        PdfReader reader = new PdfReader(sourceFiles[fileCounter]);                        int numberOfPages = reader.NumberOfPages;                        // Iterate through all pages                        for (int currentPageIndex = 1; currentPageIndex <= numberOfPages; currentPageIndex++)                        {                            // Determine page size for the current page                            document.SetPageSize(reader.GetPageSizeWithRotation(currentPageIndex));                            // Create page                            document.NewPage();                            PdfImportedPage importedPage = writer.GetImportedPage(reader, currentPageIndex);                            // Determine page orientation                            int pageOrientation = reader.GetPageRotation(currentPageIndex);                            if ((pageOrientation == 90) || (pageOrientation == 270))                            {                                content.AddTemplate(importedPage, 0, -1f, 1f, 0, 0, reader.GetPageSizeWithRotation(currentPageIndex).Height);                            }                            else                            {                                content.AddTemplate(importedPage, 1f, 0, 0, 1f, 0, 0);                            }                        }                    }                }                catch (Exception exception)                {                    throw new Exception("There has an unexpected exception occured during the pdf merging process.", exception);                }            }            finally            {                document.Close();            }            return output.GetBuffer();        }        /// <summary>        /// 递归执行文件        /// </summary>        /// <param name="path"></param>        public void MergeFiles(object sender)        {            string path = sender.ToString();            DirectoryInfo[] ChildDirectory;                                                                                   DirectoryInfo FatherDirectory = new DirectoryInfo(path);                ChildDirectory = FatherDirectory.GetDirectories("*.*");                        //FileInfo[] NewFileInfo= FatherDirectory.GetFiles("*.pdf");            //FileInfo[] NewFileInfo2 = FatherDirectory.GetFiles("*.*");            string[] NewFileInfo3 = Directory.GetFiles(FatherDirectory.FullName,"*.pdf");            string[] NewFileInfo4 = Directory.GetFiles(FatherDirectory.FullName, "*.*",SearchOption.TopDirectoryOnly);                  // 排序            Array.Sort(NewFileInfo3, new MyDateSorter());            List<byte[]> filesByte = new List<byte[]>();            // 刪除除pdf以外的文件            foreach (string FI in NewFileInfo4)            {                if (FI.IndexOf(".pdf")==-1)                {                    File.Delete(FI);                }            }            foreach (string FI in NewFileInfo3)            {                filesByte.Add(File.ReadAllBytes(FI));                File.WriteAllBytes(FatherDirectory.FullName + "//" + FatherDirectory.Name + ".pdf", GetByteFiles(filesByte));                currentfileName = FI;                setLableText();                 File.Delete(FI);                          }                        foreach (DirectoryInfo dirInfo in ChildDirectory)            {                MergeFiles(dirInfo.FullName);            }        }        # region 合并PDF        public void MergeFilesExe(object sender)        {            System.ComponentModel.BackgroundWorker bw = new BackgroundWorker();            bw.DoWork += new DoWorkEventHandler(bw_DoWork);            bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);            bw.RunWorkerAsync(sender);        }        # endregion        # region 执行后台线程        void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)        {            pb.Visible = false;            this.Lb.Text = "PDF文件合并完成！";        }        void bw_DoWork(object sender, DoWorkEventArgs e)        {            setVisible();            MergeFiles(e.Argument.ToString());        }        # endregion        # region 线程访问控件        delegate void setProgressBarPositionCallBack(System.Windows.Forms.PictureBox refpb);        public void setVisiblebyDelegate(System.Windows.Forms.PictureBox refpb)        {            refpb.Visible = true;        }        public void setVisible()        {            setProgressBarPositionCallBack scc = new setProgressBarPositionCallBack(setVisiblebyDelegate);            this.pb.Invoke(scc,new object[]{this.pb});        }        delegate void setProgressBarPositionCallBackLable(string refLb);        public void setVisiblebyDelegateLable(string refLb)        {            this.Lb.Text = "正在合并" + refLb + "......";        }        public void setLableText()        {            setProgressBarPositionCallBackLable scc = new setProgressBarPositionCallBackLable(setVisiblebyDelegateLable);            this.Lb.Invoke(scc, new object[] { currentfileName });        }        # endregion    }     /// <summary>    /// 文件排序    /// </summary>    public class MyDateSorter : IComparer {      #region IComparer Members       public int Compare(object x, object y)       {           if (x == null && y == null)           {               return 0;           }           if (x == null)           {               return -1;           }           if (y == null)           {               return 1;           }        string xInfo = (string)x;        string yInfo = (string)y;             //依名稱排序           //return xInfo.Name.CompareTo(yInfo.Name);//遞增        int index = xInfo.IndexOf("-");        string strXInfo = "";        string strYInfo = "";        // 期刊数据        if (index == -1)        {            strXInfo = xInfo.Replace(".pdf","");            strYInfo = yInfo.Replace(".pdf", "");        }        // 中文会议        else        {            strXInfo = xInfo.Substring(index + 1).Replace(".pdf", "");            strYInfo = yInfo.Substring(index + 1).Replace(".pdf", "");        }        strXInfo = strXInfo.Replace("//","|");        string[] temp = strXInfo.Split('|');        strXInfo = temp[temp.Length - 1].ToString();        temp = null;        strYInfo = strYInfo.Replace("//", "|");        temp = strYInfo.Split('|');        strYInfo = temp[temp.Length - 1].ToString();        if (int.Parse(strXInfo) > int.Parse(strYInfo))        {            return 1;        }        else if (int.Parse(strXInfo) < int.Parse(strYInfo))        {            return -1;        }        else        {            return 0;        }        //return yInfo.FullName.CompareTo(xInfo.FullName);//遞減             //依修改日期排序           //return xInfo.LastWriteTime.CompareTo(yInfo.LastWriteTime);//遞增           //return yInfo.LastWriteTime.CompareTo(xInfo.LastWriteTime);//遞減       }      #endregion   }}

using System;using System.Collections.Generic;using System.Linq;using System.Text;using iTextSharp.text;using iTextSharp.text.pdf;namespace BLL{    /// <summary>    /// Implements custom page events.    /// </summary>    internal class PdfPageEvents : IPdfPageEvent    {        #region members        private BaseFont _baseFont = null;        private PdfContentByte _content;        #endregion        #region IPdfPageEvent Members        public void OnOpenDocument(PdfWriter writer, Document document)        {            _baseFont = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);            _content = writer.DirectContent;        }        public void OnStartPage(PdfWriter writer, Document document)        {        }        public void OnEndPage(PdfWriter writer, Document document)        {            //// Write header text            //string headerText = "PDF Merger by Smart-Soft";            //_content.BeginText();            //_content.SetFontAndSize(_baseFont, 8);            //_content.SetTextMatrix(GetCenterTextPosition(headerText, writer), writer.PageSize.Height - 10);            //_content.ShowText(headerText);            //_content.EndText();            //// Write footer text (page numbers)            //string text = "Page " + writer.PageNumber;            //_content.BeginText();            //_content.SetFontAndSize(_baseFont, 8);            //_content.SetTextMatrix(GetCenterTextPosition(text, writer), 10);            //_content.ShowText(text);            //_content.EndText();        }        public void OnCloseDocument(PdfWriter writer, Document document)        {        }        public void OnParagraph(PdfWriter writer, Document document, float paragraphPosition)        {        }        public void OnParagraphEnd(PdfWriter writer, Document document, float paragraphPosition)        {        }        public void OnChapter(PdfWriter writer, Document document, float paragraphPosition, Paragraph title)        {        }        public void OnChapterEnd(PdfWriter writer, Document document, float paragraphPosition)        {        }        public void OnSection(PdfWriter writer, Document document, float paragraphPosition, int depth, Paragraph title)        {        }        public void OnSectionEnd(PdfWriter writer, Document document, float paragraphPosition)        {        }        public void OnGenericTag(PdfWriter writer, Document document, Rectangle rect, string text)        {        }        #endregion        private float GetCenterTextPosition(string text, PdfWriter writer)        {            return writer.PageSize.Width / 2 - _baseFont.GetWidthPoint(text, 8) / 2;        }            }}

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using BLL;using Spring.Context;using Spring.Context.Support;using Spring.Objects.Factory.Config;using Spring.Objects.Factory.Support;using Spring.Objects.Factory.Xml;namespace PDF_Merger{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        /// <summary>        /// 合併PDF文件        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void btnMerge_Click(object sender, EventArgs e)        {            if (string.IsNullOrEmpty(textBox1.Text))            {                MessageBox.Show("請指定文件目錄！");                return;            }            IApplicationContext ctx = ContextRegistry.GetContext();            ProxyPdfMerger Merger = (ProxyPdfMerger)ctx.GetObject("ProxyPdfMer");            Merger.MergeFiles(this.textBox1.Text,"",ref this.pbLoading,ref this.label3);        }        /// <summary>        /// 選擇文件        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void btnChooseFolder_Click(object sender, EventArgs e)        {            folderBrowserDialog1 = new FolderBrowserDialog();            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)            {                textBox1.Text = folderBrowserDialog1.SelectedPath;            }        }    }}

<?xml version="1.0" encoding="utf-8" ?><configuration>  <configSections>    <sectionGroup name="spring">      <section name="context" type="Spring.Context.Support.ContextHandler, Spring.Core"/>      <section name="objects" type="Spring.Context.Support.DefaultSectionHandler, Spring.Core" />    </sectionGroup>    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />    <sectionGroup name="common">      <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />    </sectionGroup>  </configSections>  <common>    <logging>      <factoryAdapter type="Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter, Common.Logging.Log4Net">        <!-- choices are INLINE, FILE, FILE-WATCH, EXTERNAL-->        <!-- otherwise BasicConfigurer.Configure is used   -->        <!-- log4net configuration file is specified with key configFile-->        <arg key="configType" value="INLINE" />      </factoryAdapter>    </logging>  </common>  <spring>    <context>      <resource uri="config://spring/objects"/>    </context>    <!--`合并PDF文件代理-->    <objects xmlns="http://www.springframework.net" >               <object id="ProxyPdfMer" type="BLL.ProxyPdfMerger,BLL">        <property name="PdfMerger" ref="PdfMergerB"/>      </object>            <!-- 不支持多PDF文件合并-->      <object name="PdfMergerA" type="BLL.PdfMerger2,BLL">        <property name="PdfPageEvent" ref="PdfPageEventA"/>      </object>      <!-- 支持多PDF文件合并-->      <object name="PdfMergerB" type="BLL.PdfMerger,BLL">        <property name="PdfPageEvent" ref="PdfPageEventA"/>      </object>            <object name="PdfPageEventA" type="BLL.PdfPageEvents,BLL">              </object>    </objects>  </spring>  <log4net>    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">      <file value="log-file.txt" />      <appendToFile value="true" />      <encoding value="unicode" />      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />      <layout type="log4net.Layout.PatternLayout">        <conversionPattern value="%date [%thread] %-5level %logger - %message%newline" />      </layout>    </appender>    <!-- Set default logging level to DEBUG -->    <root>      <level value="DEBUG" />      <appender-ref ref="ConsoleAppender" />    </root>    <logger name="MySpringNet1.EatForDinner">      <level value="DEBUG" />    </logger>    <!-- Set logging for Spring to INFO.  Logger names in Spring correspond to the namespace -->    <logger name="Spring">      <level value="INFO" />    </logger>  </log4net>  </configuration>