How to Convert XLSX to XLS Using GroupDocs.Conversion for .NET

Introduction

Are you struggling with outdated spreadsheet formats in your business or project? Converting modern XLSX files into the older, widely-used XLS format can be a headache. With GroupDocs.Conversion for .NET, this task becomes effortless and efficient. This comprehensive guide will walk you through converting an Excel file from XLSX to XLS using the GroupDocs.Conversion library.

Primary Keywords: Convert XLSX to XLS, GroupDocs.Conversion .NET

In this tutorial, we’ll cover:

• Setting up GroupDocs.Conversion for .NET
• Writing a simple C# program to perform the conversion
• Understanding configuration options and troubleshooting common issues

By the end of this guide, you’ll have everything you need to integrate this functionality into your applications. Let’s begin with the prerequisites.

Prerequisites

Before diving into the code, ensure that you have:

1. Libraries and Dependencies: Install .NET Framework or .NET Core on your machine.
2. GroupDocs.Conversion for .NET library: Version 25.3.0 or later is required.
3. Knowledge Prerequisites: Basic understanding of C# programming and familiarity with handling file paths in .NET.

Setting Up GroupDocs.Conversion for .NET

To use GroupDocs.Conversion, install the library into your project:

NuGet Package Manager Console

Install-Package GroupDocs.Conversion -Version 25.3.0

.NET CLI

dotnet add package GroupDocs.Conversion --version 25.3.0

License Acquisition

GroupDocs offers a free trial, temporary licenses for testing purposes, and full purchase options:

• Free Trial: Download the trial version from their release page.
• Temporary License: Obtain a temporary license to test all features without limitations at this link.
• Purchase: For commercial use, purchase a license via GroupDocs’ official website.

Basic Initialization and Setup

After installing the package, initialize GroupDocs.Conversion as follows:

using System;
using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;

// Sample initialization code
var converter = new Converter("sample.xlsx");

This setup allows you to start converting files in your .NET applications.

Implementation Guide

Convert XLSX to XLS

Overview

Converting an XLSX file to the older XLS format ensures compatibility with legacy systems. This section guides you through implementing this conversion using GroupDocs.Conversion for .NET.

Step 1: Define File Paths

string sourceFilePath = Path.Combine("YOUR_DOCUMENT_DIRECTORY\