Aspose.Cells  for .NET

Insert comments in XLS file via C#

Build your own .NET application to manipulate comments & authors in document files using server-side APIs.

Insert comments in XLS File Using .NET

With Aspose.Cells for .NET library, you can easily insert comments in XLS file programmatically with a few lines of code. Aspose.Cells for .NET is capable of building cross-platform applications with the ability to generate, modify, convert, render and print all Excel files. .NET Excel API not only convert between spreadsheet formats, it can also render Excel files as images, PDF, HTML, ODS, CSV, SVG, JSON, WORD, PPT and more, thus making it a perfect choice to exchange documents in industry-standard formats. Open NuGet package manager, search for Aspose.Cells and install. You may also use the following command from the Package Manager Console.

Package Manager Console Command

PM> Install-Package Aspose.Cells

System Requirements

Aspose.Cells for .NET is supported on all major operating systems. Just make sure that you have the following prerequisites.

  • Microsoft Windows or a compatible OS with .NET, .NET Core or Mono Platforms.
  • Development environment like Microsoft Visual Studio.
  • Our product is fully cross-platform and supports Windows, Linux, MacOS, Azure, AWS Lambda.

How to insert comments in XLS file via C#

You need aspose.cells.dll to try the code in your environment.

  • Load XLS file by creating an instance of Workbook
  • Insert comments to the Worksheet in a Cell
  • Save the workbook

In Office 365, comments are for conversations, you can use the following C# code to insert and remove comments in XLS file.


C# sample code to Insert and remove comments in XLS file

Free App to remove Annotations from XLS file
Input file
  using Aspose.Cells;   
  var workbook = new Workbook("Input.xlsx");
  foreach (Worksheet _ws in workbook.Worksheets)

XLS What is XLS File Format?

Files with XLS extension represent Excel Binary File Format. Such files can be created by Microsoft Excel as well as other similar spreadsheet programs such as OpenOffice Calc or Apple Numbers. File saved by Excel is known as Workbook where each workbook can have one or more worksheets. Data is stored and displayed to users in table format in worksheet and can span numeric values, text data, formulas, external data connections, images, and charts. Applications like Microsoft Excel lets you export workbook data to several different formats including PDF, CSV, XLSX, TXT, HTML, XPS, and several others. The XLS file format was replaced with a more open and structured format, XLSX, with the release of Microsoft Excel 2007. The latest versions still provide support for creating and reading XLS files, though XLSX is the first choice of use now.

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Insert Comments to Other Supported Excel Formats

Using C#, one can easily insert comments in other Excel format files.

ODS (OpenDocument Spreadsheet File)
XLS (Excel Binary Format)
XLSB (Binary Excel Workbook File)
XLSM (Spreadsheet File)
XLSX (OOXML Excel File)