How to split an Excel XLSX into Separate Worksheets in C# .NET Framework

Splitting off worksheets from Excel files is a very useful feature to have. Unfortunately, the usual approach to handling this requires many hours of coding on your part to deal with parsing the file format and then performing the actual separation in a graceful way. To deal with this easily, I will be showing you a nice tidy library that can do it all for us in double-quick time.

First we need to bring in our package, which we can do using this command for the NuGet console:

Install-Package Cloudmersive.APIClient.NET.DocumentAndDataConvert -Version 3.2.8

Now we go ahead and call our function for splitting XLSX:

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 SplitDocumentXlsxExample
{
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 SplitDocumentApi();
var inputFile = new System.IO.Stream(); // System.IO.Stream | Input file to perform the operation on.
var returnDocumentContents = true;  // bool? | Set to true to return the contents of each Worksheet directly, set to false to only return URLs to each resulting worksheet.  Default is true. (optional)
try
{
// Split a single Excel XLSX into Separate Worksheets
SplitXlsxWorksheetResult result = apiInstance.SplitDocumentXlsx(inputFile, returnDocumentContents);
Debug.WriteLine(result);
}
catch (Exception e)
{
Debug.Print("Exception when calling SplitDocumentApi.SplitDocumentXlsx: " + e.Message );
}
}
}
}

And we are already finished with our setup. Time to start splitting!