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Convert XLSX to HTML with NET REST API

In this straightforward tutorial, you’ll discover how to convert XLSX to HTML with NET REST API. We’ll walk you through building an XLSX‑to‑HTML converter using the C# Low Code API, with clear, step‑by‑step guidance in the sections that follow. The finished application can be integrated into any .NET project on macOS, Linux, or Windows, and the conversion is completely free.

Prerequisite

Steps to Convert XLSX to HTML with NET REST API

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

The aforementioned steps transform the file type from XLSX to HTML 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 XLSX file using a FileStream and create an instance of the PostConvertWorkbookToPDFRequest class that is further used for performing the conversion to a HTML file stream using the PostConvertWorkbookToHtml() method.

Code for XLSX to HTML Conversion in NET Low Code API

This straightforward C# example converts an XLSX file to HTML via the Aspose.Cells REST API. Just provide the local path to the Excel file, the SDK handles the conversion, and once the process completes you can download the resulting HTML stream and save it locally.

In this guide we explored how to transform XLSX to HTML with the Cloud API. Ready to convert XLSX to CSV instead? Check out our step‑by‑step tutorial on Convert XLSX to CSV with NET REST API.

 

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