XLSX to CSV using C#

The C# library for converting Excel documents to Csv files.

The C# library for converting Excel XLSX spreadsheets to comma-separated value CSV files.

Try for FREE

C# library install

ConvertAPI provides an ASP.NET C# library that allows you to perform a XLSX to CSV conversion with just a few lines of code. Convert XLSX to CSV documents using C# programming language with no effort at all!

        NuGet Terminal >
    
Install-Package ConvertApi

NuGet GitHub

Authenticate ConvertAPI C# library

You can obtain your secret key by signing up for a free account. Once you sign up, you'll receive 250 free conversions instantly! Grab your authentication secret from the account dashboard, and authenticate the ConvertAPI C# library like this:

// get your secret key here: https://www.convertapi.com/a/auth

ConvertApi convertApi = new ConvertApi("your-api-secret");

XLSX to CSV using C# in no time!

Once you have your authentication in place, simply copy-paste this xlsx to csv conversion code snippet into your C# project:

// Code snippet is using the ConvertAPI JavaScript Client: https://github.com/ConvertAPI/convertapi-js

// Code snippet is using the ConvertAPI Node.js Client: https://github.com/ConvertAPI/convertapi-nodejs

// Code snippet is using the ConvertAPI PHP Client: https://github.com/ConvertAPI/convertapi-php

// Code snippet is using the ConvertAPI Java Client: https://github.com/ConvertAPI/convertapi-java

// Code snippet is using the ConvertAPI C# Client: https://github.com/ConvertAPI/convertapi-dotnet

# Code snippet is using the ConvertAPI Ruby Client: https://github.com/ConvertAPI/convertapi-ruby

# Code snippet is using the ConvertAPI Python Client: https://github.com/ConvertAPI/convertapi-python

// Code snippet is using the ConvertAPI Go Client: https://github.com/ConvertAPI/convertapi-go

REM Code snippet is using the command line utility program: https://github.com/ConvertAPI/convertapi-cli

Upload the file and see how it works

You can set up the advanced conversion parameters and test the conversion result online using our interactive demo tool. It will auto-generate the code snippet for you!

Advanced XLSX to CSV conversion parameters

Password String

Sets the password to open protected documents.

WorksheetActive Bool

Set to convert active worksheet. If value is set False all worksheet will be converted.

WorksheetIndex String

Set one or several worksheet indexes(number) separated by comma to convert. If value is not set all worksheet will be converted.

WorksheetName String

Set one or several worksheet names separated by comma to convert. If value is not set all worksheet will be converted.