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Replace Text in Excel using C# REST API

This step‑by‑step guide demonstrates how to replace text in Excel using the C# REST API. By utilizing the .NET‑based Aspose.Cells Cloud SDK, you’ll learn to locate and substitute text in single or multiple Excel workbooks, then download the modified files straight to your local disk.

Prerequisite

Steps to Search and Replace Text in Excel using C# REST API

  1. Define the App Client ID, Secret, and Aspose Cloud API endpoint
  2. Create an instance of CellsApi with the specified credentials
  3. Initialize a dictionary to hold Excel file names and their streams
  4. Search all .xlsx files within the current directory and its subfolders
  5. Read each Excel file and add its name and stream to the dictionary
  6. Build a PostReplaceRequest with the files, search text, and replacement text
  7. Call the API PostReplace to replace the text across all uploaded Excel files
  8. 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 code above illustrates how to find and replace text in Excel using C# Low Code API. After performing the replacement, it writes the updated worksheets to cloud storage as new files, and it also saves copies of any files where no changes were needed—ensuring you maintain a complete repository of both modified and unmodified documents.

In this guide we walked through how to locate and replace text in Excel using the C# REST API. If you also need to find and extract text, be sure to explore our tutorial Search Text in Excel using C# REST API.

 

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