How to Write Comments for Excel Cells with C#

Comment is text about criticism or annotation. It is often written on the blank when reading one book, which can help reader master contents.

At present, we often write comments in electronic documents. For example, if there is some special data or important data in an Excel workhsheet, we write comment for it to tell others what it shows. So, how to write comment in Excel?

Then, I will introduce one method to write comment in Excel with C#. This method is based on a C# .NET Excel component, Spire.XLS for .NET. Therefore, we need to download this compnent and install it.

1. Create a new project and name it, WriteComment.

2. Add Spire.XLS for .NET DLL file as reference. Because we will set format for cells, so we need to add another reference System.Drawing.

3. Create a new workbook and set column width. Then, write text which we want to add comment by rang.Text. Use range.Comment.Text to set regular comment and range.Comment.RichText.Text to set rich text comment.

Use the code:

using System.Drawing;

using Spire.Xls;


namespace WriteComment


    class Comment


        static void Main(string[] args)


            Workbook workbook = new Workbook();


            //Initialize worksheet


            Worksheet sheet = workbook.Worksheets[0];

            sheet.SetColumnWidth(1, 25);


            //Create Font

            ExcelFont fontBlue = workbook.CreateFont();

            fontBlue.KnownColor = ExcelColors.SkyBlue;

            ExcelFont fontGreen = workbook.CreateFont();

            fontGreen.KnownColor = ExcelColors.SeaGreen;


            //Regular Comment

            CellRange range = sheet.Range[“A1”];

            range.Text = “Regular comment”;

            sheet.Range[“A1”].Style.Font.Color = Color.DarkGreen;

            sheet.Range[“A1”].Style.Font.FontName = “Segoe Script”;

            sheet.Range[“A1”].Style.Font.Size = 12;

            sheet.Range[“A1”].Style.Font.IsBold = true;

            range.Comment.Text = “Regular comment”;


            //Rich Text Comment

            range = sheet.Range[“A3”];

            range.Text = “Rich text comment”;

            sheet.Range[“A3”].Style.Font.Color = Color.DarkBlue;

            sheet.Range[“A3”].Style.Font.FontName = “Segoe Script”;

            sheet.Range[“A3”].Style.Font.Size = 12;

            sheet.Range[“A3”].Style.Font.IsBold = true;


            //Set Rich Text Comment Format

            range.Comment.RichText.Text = “Rich text comment”;

            range.Comment.RichText.SetFont(0, 4, fontGreen);

            range.Comment.RichText.SetFont(5, 9, fontBlue);


            //Save and Launch

            workbook.SaveToFile(“Write Comment.xls”);






DOWNLOAD Spire.XLS for .NET Here


14 thoughts on “How to Write Comments for Excel Cells with C#

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