This tutorial demonstrates how to import data into Excel using a C# REST API directly from a list or array in your application. Leveraging the .NET‑based Cloud SDK, you’ll get step‑by‑step instructions for sending data to an Excel workbook and precisely defining the destination range within the file.

Prerequisite

• Create an account and get API credentials for inserting double‑array data into an Excel file
• Download the Aspose.Cells Cloud SDK for Dotnet to import lists or arrays of numbers to Excel
• Set up a C# project with the above SDK

Steps for Data Import to Excel using C# Low Code API

1. Set your client ID, client secret, and base URL to connect to Aspose.Cells Cloud
2. Set up the CellsApi object with your credentials for API operations
3. Specify the local Excel file that you want to upload and update
4. Create an upload request with the file details and send it to Aspose Cloud storage
5. Set up the import options to define where and how the double array will be inserted into the worksheet
6. Create and execute the PostImportData call to insert the double array data into your specified worksheet
7. Request and download the modified Excel file from the cloud to your system and save it on the disk

These steps summarize the process of data import in Excel using C# .NET-based API. First, you connect to Aspose Cloud, upload your Excel file, and set up how and where your double array data should be added. Once the data is imported using the PostImportData API call, simply download the updated file and save it to your computer.

Code to Automatically Import Data into Excel using C# RESTful Service

The code above demonstrates how to import data into an Excel spreadsheet using the C# REST Interface. You can pick the worksheet, define the starting cell, choose the import data type, and set the orientation—horizontal or vertical. Keep in mind that the IsInsert parameter is required to actually insert the data into the sheet.

In this guide we’ve demonstrated how to import a list or array of data into an Excel workbook using the C# REST interface. If you need to bring a CSV file into Excel instead, see our companion article — Import CSV to XLSX using C# REST API.