Ideally, you should do this using a library because .docx files are not simple text files, they are in a format called Office Open XML which is an XML-based file format.
On the libraries I did a search and found two that you might be interested in using:
-
Using Microsoft.Office.Interop.Word , which requires that Microsoft Word be installed. This library creates a Word instance to perform operations on top of a document, so it must be installed on the client machine.
-
Or used the DocX library, which manages to assemble Word documents without the need to have the program installed on the client machine.
If you choose to use Microsoft.Office.Interop.Word , take a look at in a question answer in Stack Overflow in English, it has an example of how to perform merge of Word documents.
To prevent this response from invalidating in the future I will put here the same solution that can be found in the link above:
The class:
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);
}
}
}
}
And the call:
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;
}
}
}
}
