How to merge two Word DOCX files together in C# .NET Framework

Functioning like a virtual stapler, document merging is an excellent feature to have in an app. Today, we will not be trudging through all the code required to make this happen the old-fashioned way. No, today we will be taking a massive shortcut in the form of an API. Total time: five minutes.

Let’s begin by using NuGet to install our API Client. This is a breeze with the Package Manager console:

Install-Package Cloudmersive.APIClient.NET.DocumentAndDataConvert -Version 2.2.0

To call MergeDocumentDocx, we can use the following code. Be sure to provide inputFile1 (starting file) and inputFile2 (the file to be added).

using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Api;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Client;
using Cloudmersive.APIClient.NET.DocumentAndDataConvert.Model;
namespace Example
{
public class MergeDocumentDocxExample
{
public void main()
{
// Configure API key authorization: Apikey
Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");
// Uncomment below to setup prefix (e.g. Bearer) for API key, if needed
// Configuration.Default.AddApiKeyPrefix("Apikey", "Bearer");
var apiInstance = new MergeDocumentApi();
var inputFile1 = new System.IO.Stream(); // System.IO.Stream | First input file to perform the operation on.
var inputFile2 = new System.IO.Stream(); // System.IO.Stream | Second input file to perform the operation on (more than 2 can be supplied).
try
{
// Merge Two Word DOCX Together
byte[] result = apiInstance.MergeDocumentDocx(inputFile1, inputFile2);
Debug.WriteLine(result);
}
catch (Exception e)
{
Debug.Print("Exception when calling MergeDocumentApi.MergeDocumentDocx: " + e.Message );
}
}
}
}

Done! Before you pop the champagne to celebrate all the time you just saved, you may wish to take a look at some of our other functions in this same API. These range everywhere from converting between numerous popular formats to creating and editing document files.