By using Aspose.Total for .NET you can convert PPSX file to XLSX within any .NET, C#, ASP.NET and VB.NET application in two simple steps. Firstly, by using Aspose.Slides for .NET , you can export PPSX to HTML. After that, by using Aspose.Cells for .NET Spreadsheet Programming API, you can convert HTML to XLSX.
How to Convert PPSX to XLSX via C#
PPSX File Conversion in C#
For PPSX file to XLSX Conversion in C#, please install the API from the command line as
nuget install Aspose.Total or via Package Manager Console of Visual Studio.
Alternatively, get the offline MSI installer or DLLs in a ZIP file from downloads .
Convert Protected PPSX to XLSX via C#
While converting PPSX file to XLSX, if your input PPSX document is password protected you cannot convert it to XLSX without decrypting the document. When your document is password protected, it means it enforces certain restrictions on the presentation. To remove the restrictions, the password has to be entered. A password-protected presentation is considered a locked presentation. The API allows you to open the encrypted document by passing the correct password in a LoadOptions object.
Convert PPSX to XLSX with Watermark via C#
While converting PPSX file to XLSX, you can also add watermark to your output XLSX file format. In order to add a watermark, you can create a new Workbook object and open the converted HTML document, select Worksheet via its index, create a Shape and use its AddTextEffect function. After that you can save your HTML document as XLSX with Watermark.