This comprehensive, step‑by‑step tutorial shows you how to replace text in Excel using the C# REST API. By harnessing the .NET‑based Aspose.Cells Cloud SDK, you’ll learn to find and substitute strings in a single workbook or across multiple Excel files, then download the updated documents directly to your local disk.
Prerequisite
- Create an account and get API credentials for replacing text
- Download Aspose.Cells Cloud SDK for Dotnet to find and replace text in a single or multiple Excel files
- Set up a C# project with the above SDK
Steps to Search and Replace Text in Excel using C# REST API
- Define the App Client ID, Secret, and Aspose Cloud API endpoint
- Create an instance of CellsApi with the specified credentials
- Initialize a dictionary to hold Excel file names and their streams
- Search all .xlsx files within the current directory and its subfolders
- Read each Excel file and add its name and stream to the dictionary
- Build a PostReplaceRequest with the files, search text, and replacement text
- Call the API PostReplace to replace the text across all uploaded Excel files
- Convert Base64 results back to streams and save them as output files
These steps summarize the process of how to replace text in Excel using C# Low Code API. The code authenticates with Aspose.Cells Cloud API, reads all .xlsx files from the current directory and subfolders, and sends them for text replacement using a specified original and replacement word. It then decodes the modified files from Base64 and saves them locally with updated content.
Code to Find and Replace Text in Excel using C# Low Code API
The example demonstrates how to locate and replace text in Excel using the C# Low‑Code API. After the replacements are applied, the updated worksheets are saved to cloud storage as new files, and any documents that required no changes are copied as‑is—providing you with a complete repository of both modified and unmodified files.
Throughout this tutorial we demonstrated how to locate and replace text in Excel using the C# REST API. If you also need to search for and extract text, be sure to check out our companion guide Search Text in Excel using C# REST API.
