用C#編程合並多個WORD文檔

需要將多個WORD文檔合並成為一個WORD文檔。其中，對WORD文檔的合並方式分兩種形式：
一是復制合並;
一是插入合並,即將多個文檔按照先後順序合並到另一個文檔中.

代碼如下:

 

using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Office.Interop.Word;
using System.Reflection;
using System.IO;
using System.Diagnostics;
namespace Eipsoft.Common
{
    /// <summary>
    /// Word文檔合並類
    /// </summary>
    public class WordDocumentMerger
    {
        private ApplicationClass objApp = null;
        private Document objDocLast = null;
        private Document objDocBeforeLast = null;
        public WordDocumentMerger()
        {
            objApp = new ApplicationClass();
        }
        #region 打開文件
        private void Open(string tempDoc)
        {
            object objTempDoc = tempDoc;
            object objMissing = System.Reflection.Missing.Value;

            objDocLast = objApp.Documents.Open(
                 ref objTempDoc,    //FileName
                 ref objMissing,   //ConfirmVersions
                 ref objMissing,   //ReadOnly
                 ref objMissing,   //AddToRecentFiles
                 ref objMissing,   //PasswordDocument
                 ref objMissing,   //PasswordTemplate
                 ref objMissing,   //Revert
                 ref objMissing,   //WritePasswordDocument
                 ref objMissing,   //WritePasswordTemplate
                 ref objMissing,   //Format
                 ref objMissing,   //Enconding
                 ref objMissing,   //Visible
                 ref objMissing,   //OpenAndRepair
                 ref objMissing,   //DocumentDirection
                 ref objMissing,   //NoEncodingDialog
                 ref objMissing    //XMLTransform
                 );

            objDocLast.Activate();
        }
        #endregion

        #region 保存文件到輸出模板
        private void SaveAs(string outDoc)
        {
            object objMissing = System.Reflection.Missing.Value;
            object objOutDoc = outDoc;
            objDocLast.SaveAs(
              ref objOutDoc,      //FileName
              ref objMissing,     //FileFormat
              ref objMissing,     //LockComments
              ref objMissing,     //PassWord    
              ref objMissing,     //AddToRecentFiles
              ref objMissing,     //WritePassword
              ref objMissing,     //ReadOnlyRecommended
              ref objMissing,     //EmbedTrueTypeFonts
              ref objMissing,     //SaveNativePictureFormat
              ref objMissing,     //SaveFormsData
              ref objMissing,     //SaveAsAOCELetter,
              ref objMissing,     //Encoding
              ref objMissing,     //InsertLineBreaks
              ref objMissing,     //AllowSubstitutions
              ref objMissing,     //LineEnding
              ref objMissing      //AddBiDiMarks
              );
        }
        #endregion

        #region 循環合並多個文件（復制合並重復的文件）
        /// <summary>
        /// 循環合並多個文件（復制合並重復的文件）
        /// </summary>
        /// <param name="tempDoc">模板文件&