Convert XLS to XLSX via C#
Export Excel spreadsheets to XLSX format on .NET Framework, .NET Core or Mono Platforms.
Convert XLS to XLSX Using C#
With Aspose.Cells for .NET library, you can easily convert XLS to XLSX programmatically with a few lines of code. Aspose.Cells for .NET is capable of building cross-platform applications with the ability to generate, modify, convert, render and print all Excel files. .NET Excel API not only convert between spreadsheet formats, it can also render Excel files as images, PDF, HTML, ODS, CSV, SVG, JSON, WORD, PPT and more, thus making it a perfect choice to exchange documents in industry-standard formats. Open NuGet package manager, search for Aspose.Cells and install. You may also use the following command from the Package Manager Console.
Package Manager Console Command
PM> Install-Package Aspose.Cells
Before running the .NET conversion example code, make sure that you have the following prerequisites.
- Microsoft Windows or a compatible OS with .NET, .NET Core, Windows Azure or Mono Platforms..
- Development environment like Microsoft Visual Studio.
- Add reference to the Aspose.Cells for .NET DLL in your project.
How to Convert XLS to XLSX via C#
.NET developers can easily load & convert XLS files to XLSX in just a few lines of code.
- Load XLS file with an instance of Workbook
- Convert XLS to XLSX by calling Workbook.Save method
XLS What is XLS File Format
Files with XLS extension represent Excel Binary File Format. Such files can be created by Microsoft Excel as well as other similar spreadsheet programs such as OpenOffice Calc or Apple Numbers. File saved by Excel is known as Workbook where each workbook can have one or more worksheets. Data is stored and displayed to users in table format in worksheet and can span numeric values, text data, formulas, external data connections, images, and charts. Applications like Microsoft Excel lets you export workbook data to several different formats including PDF, CSV, XLSX, TXT, HTML, XPS, and several others. The XLS file format was replaced with a more open and structured format, XLSX, with the release of Microsoft Excel 2007. The latest versions still provide support for creating and reading XLS files, though XLSX is the first choice of use now.Read More
XLSX What is XLSX File Format
XLSX is well-known format for Microsoft Excel documents that was introduced by Microsoft with the release of Microsoft Office 2007. Based on structure organized according to the Open Packaging Conventions as outlined in Part 2 of the OOXML standard ECMA-376, the new format is a zip package that contains a number of XML files. The underlying structure and files can be examined by simply unzipping the .xlsx file.Read More
Other Supported Conversions
You can also convert XLS into many other file formats including few listed below.