protect unprotect excel files c#

MS Excel provides convenient ways of storing and managing small or large amounts of data. Excel workbooks are widely used to maintain the datasets, analyze the data, perform activities related to finance or human resources, and etc. With the advancement in technology, the ways of getting unauthorized access to data have also been increased. Therefore, MS Excel lets you protect the workbooks using the password. In this article, you will learn how to automate the spreadsheet protection features and protect and unprotect Excel files programmatically using C#.

C# API to Protect Excel Files - Free Download

Aspose.Cells for .NET is a well-known spreadsheet manipulation API that lets you create and process Excel files from within your .NET applications. The API allows you to protect and unprotect the Excel files within a few lines of code. You can either download the binaries of the API or get it installed using NuGet.

Install-Package Aspose.Cells

Protect Excel Files using C#

Protecting MS Excel is as easy as pie and can be done in a few steps. Simply load the Excel file, protect it, and save the protected file. Furthermore, you can specify the protection type you want to apply, i.e. protect everything, objects or content only, and etc. The following are the steps to protect an Excel file using Aspose.Cells for .NET.

The following code sample shows how to protect Excel file using C#.

Unprotect Excel Files using C#

You can also unprotect the Excel files by providing the password to the API. The following are the steps to unprotect a protected Excel file.

The following code sample shows how to unprotect an Excel file using C#.


Protection of the data in MS Excel files is an important aspect of the digital world. Therefore, this article presents how to automate the process of protecting or unprotecting Excel files using C#. The step by step guide along with the API references and code samples make you learn how to implement these features in your .NET applications. You can explore more about the API using documentation.

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