Объединение файлов docx вместе, включая верхние, нижние колонтитулы и изображения

проверьте это http://devpinoy.org/blogs/keithrull/archive/2007/05/23/how-to-merge-multiple-microsoft-word-documents-in-c.aspx

измените эту строку:

object pageBreak = Word.WdBreakType.wdPageBreak;

этой

object pageBreak = Word.WdBreakType.wdSectionBreakNextPage;

чтобы получить заголовок и нижний колонтитул со второй документ.

добавление всего метода и его вызов в случае изменения источника.

Класс:

using System;
using Word = Microsoft.Office.Interop.Word;
using System.Configuration;

namespace KeithRull.Utilities.OfficeInterop
{
  public class MsWord
  {
    /// <summary>
    /// This is the default Word Document Template file. I suggest that you point this to the location
    /// of your Ms Office Normal.dot file which is usually located in your Ms Office Templates folder.
    /// If it does not exist, what you could do is create an empty word document and save it as Normal.dot.
    /// </summary>
    private static string defaultWordDocumentTemplate = @"Normal.dot";

    /// <summary>
    /// A function that merges Microsoft Word Documents that uses the default template
    /// </summary>
    /// <param name="filesToMerge">An array of files that we want to merge</param>
    /// <param name="outputFilename">The filename of the merged document</param>
    /// <param name="insertPageBreaks">Set to true if you want to have page breaks inserted after each document</param>
    public static void Merge(string[] filesToMerge, string outputFilename, bool insertPageBreaks)
    {
        Merge(filesToMerge, outputFilename, insertPageBreaks, defaultWordDocumentTemplate);
    }

    /// <summary>
    /// A function that merges Microsoft Word Documents that uses a template specified by the user
    /// </summary>
    /// <param name="filesToMerge">An array of files that we want to merge</param>
    /// <param name="outputFilename">The filename of the merged document</param>
    /// <param name="insertPageBreaks">Set to true if you want to have page breaks inserted after each document</param>
    /// <param name="documentTemplate">The word document you want to use to serve as the template</param>
    public static void Merge(string[] filesToMerge, string outputFilename, bool insertPageBreaks, string documentTemplate)
    {
        object defaultTemplate = documentTemplate;
        object missing = System.Type.Missing;
        object pageBreak = Word.WdBreakType.wdSectionBreakNextPage;
        object outputFile = outputFilename;

        // Create  a new Word application
        Word._Application wordApplication = new Word.Application( );

        try
        {
            // Create a new file based on our template
            Word.Document wordDocument = wordApplication.Documents.Add(
                                          ref missing
                                        , ref missing
                                        , ref missing
                                        , ref missing);

            // Make a Word selection object.
            Word.Selection selection = wordApplication.Selection;

            //Count the number of documents to insert;
            int documentCount = filesToMerge.Length;

            //A counter that signals that we shoudn't insert a page break at the end of document.
            int breakStop = 0;

            // Loop thru each of the Word documents
            foreach (string file in filesToMerge)
            {
                breakStop++;
                // Insert the files to our template
                selection.InsertFile(
                                            file
                                        , ref missing
                                        , ref missing
                                        , ref missing
                                        , ref missing);

                //Do we want page breaks added after each documents?
                if (insertPageBreaks && breakStop != documentCount)
                {
                    selection.InsertBreak(ref pageBreak);
                }
            }

            // Save the document to it's output file.
            wordDocument.SaveAs(
                            ref outputFile
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing
                        , ref missing);

            // Clean up!
            wordDocument = null;
        }
        catch (Exception ex)
        {
            //I didn't include a default error handler so i'm just throwing the error
            throw ex;
        }
        finally
        {
            // Finally, Close our Word application
            wordApplication.Quit(ref missing, ref missing, ref missing);
        }
    }
}
}

и звонок:

using System;
using KeithRull.Utilities.OfficeInterop;

namespace WordDocMerge2
{
  class Program
  {
    static void Main(string[] args)
    {
        try
        {
            string document1 = @"D:\Visual Studio Projects.docx";
            string document2 = @"D:\Visual Studio Projects.docx";
            string document3 = @"D:\Visual Studio Projects.docx";

            string[] documentsToMerge = { document1, document2, document3 };

            string outputFileName = String.Format("D:\Visual Studio Projects\{0}.docx", Guid.NewGuid( ));

            MsWord.Merge(documentsToMerge, outputFileName, true);

        }
        catch (Exception ex)
        {
            //messageLabel.Text = ex.Message;
        }
    }
}
}