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Convert Excel to CSV with NET REST API

In this quick guide, you’ll discover how to convert XLS to CSV using the .NET REST API. We’ll walk you through building an XLS‑to‑CSV converter with the C# Low‑Code API, step by step, so you can embed the solution in any .NET application on Linux, Windows, or macOS—completely free.

Prerequisite

Steps to Convert XLS to CSV with NET REST API

  1. Set the Client ID and Client Secret for the API to convert XLS to CSV
  2. Create an instance of CellsApi class with client credentials to perform XLS to CSV conversion
  3. Specify the source XLS and output CSV file names and load the source XLS file in a memory stream
  4. Create an instance of the PostConvertWorkbookToCSVRequest with input XLS file stream and other optional properties
  5. Call the Excel to CSV request method to convert XLS to CSV with NET REST API
  6. Save the rendered CSV file stream on the local disk

The aforementioned steps transform the file type from Excel to CSV with C# low code API. We will start the process with the initialization by configuring the SDK and creating the CellsAPI class object. We will then access the source XLS file using a FileStream and create an instance of the PostConvertWorkbookToPDFRequest class that is further used for performing the conversion to a CSV file stream using the PostConvertWorkbookToCSV() method.

Code for Excel to CSV Conversion in NET Low Code API

With just a few lines of C# code, you can harness the Aspose.Cells REST API SDK to turn an Excel workbook into a CSV file. Simply supply the local path to your XLS file, let the SDK handle the conversion, and once the process finishes, retrieve the resulting CSV stream and save it to disk.

In this guide we’ve shown you how to transform XLS to CSV with Cloud API. Ready to take the next step? Explore our tutorial on converting Excel files to DOCX with the NET REST API here: Convert Excel to DOCX with NET REST API.

 

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