Comments (Notes)

You can add/edit/delete Comments (in later Excel versions called Notes) either via the ExcelRange class or via the Comments Property on the ExcelWorksheet class.
EPPlus supports Comments/Notes with plain as well as richtext, see examples below.

Classes

ExcelComment

When adding/editing comments you will be working with the OfficeOpenXml.ExcelComment class. Here are the most important properties of this class:

Property	Datatype	Description
Author	string	Author of the comment
Text	string	Plain text of the comment
RichText	ExcelRichTextCollection	Richtext (set Font, Font size/style, Color, etc on the whole text or different parts of it) of the comment, see the Richtext section below
From	ExcelVmlDrawingPosition	From position. For comments only when Visible=true
To	ExcelVmlDrawingPosition	To position. For comments only when Visible=true
Autofit	bool	Autofits the comment
BackgroundColor	System.Drawing.Color	Background color of the comment
LineStyle	eLineStyleVml	Border style
LineColor	System.Drawing.Color	Border color
LineWidth	float	Border width

ExcelRichTextCollection

Available via the ExcelComment.RichText property, which is of the type OfficeOpenXml.Style.ExcelRichTextCollection.

Properties

Property	Datatype	Description
Text	string	The plain text
HtmlText	string	Returns the rich text as html
Count	int	Number of items in the collection

Methods

Method	Return type	Description
Add(string text, bool NewParagraph=false)	ExcelRichText	Adds a rich text string to the collection
Clear()	void	Removes all items from the collection
Remove(ExcelRichText item)	void	Removes an item from the collection
RemoveAt(int index)	void	Removes an item from the collection by its index
Insert(int index, string text)	ExcelRichText	Inserts an item into the collection
this[int index]	ExcelRichText	Returns an item by its index

ExcelRichText

Namespace: OfficeOpenXml.Style

Properties

Property	Datatype	Description
Text	string	The plain text
HtmlText	string	Returns the rich text as html
Color	System.Drawing.Color	Color of the text
Size	float	Size of the font
Bold	bool	If true the text is bold
Italic	bool	If true the text is italic
Underline	bool	If true the text will be underlined
Strike	bool	If true the text will be striked out
FontName	string	Name of the font
PreserveSpace	bool	Preserves whitespace. Default is true

Examples

Add new comments

using(var package = new ExcelPackage(@"c:\temp\commentstest.xlsx"))
{
    var ws = package.Workbook.Worksheets.Add("comments");
    //Adds comments using the range class
    var comment = ws.Cells["A3"].AddComment("Jan Källman:\r\n", "JK");
    comment.Font.Bold = true;
    var rt = comment.RichText.Add("Here is some text that isn't bold...");
    rt.Bold = false;
    rt.FontName = "Helvetica";
    rt.Color = Color.Purple;
    comment.AutoFit = true;

    //Adds a comment using the worksheet's Comments collection
    var comment2 = ws.Comments.Add(ws.Cells["B3"],"Jan Källman:", "JK");

    //This sets the size and position. (The position is used when the comment is visible and AutoFit isn't set to true)
    comment2.From.Column = 7;
    comment2.From.Row = 3;
    comment2.To.Column = 16;
    comment2.To.Row = 8;
    comment2.BackgroundColor = Color.White;
    comment2.RichText.Add("\r\nThis comment has white background and size/position set...\r\n");
}

Editing a comment

The code below is using the workbook that was created in the Add new comments section above.

using (var package = new ExcelPackage(@"c:\temp\commentstest.xlsx"))
{
    var ws = package.Workbook.Worksheets["comments"];
    // Edit Comment using the range class
    var comment = ws.Cells["A3"].Comment;
    comment.RichText[0].Color = Color.DarkGreen;
    comment.RichText[1].Color = Color.Blue;
    package.Save();
}

You can also edit comments via the Comments collection on the worksheet.

using (var package = new ExcelPackage(@"c:\temp\commentstest.xlsx"))
{
    var ws = package.Workbook.Worksheets["comments"];
    // Edit Comment using the Comments collection on the worksheet
    var comment = ws.Comments["A3"];
    comment.RichText[0].Color = Color.DarkRed;
    comment.RichText[1].Color = Color.Orange;
    package.Save();
}

Deleting a comment

The code below is using the workbook that was created in the Add new comments section above.

using (var package = new ExcelPackage(@"c:\temp\commentstest.xlsx"))
{
    var ws = package.Workbook.Worksheets["comments"];
    // Remove comment in cell B3 using the Comments collection on worksheet.
    ws.Comments.Remove(ws.Comments["B3"]);
    package.Save();
}

See also

[Sample 3.4-C#](https://github.com/EPPlusSoftware/EPPlusSample.CSharp/blob/main/03-Styling/04-Create file system report/CreateAFileSystemReport.cs) or [Sample 3.4-VB](https://github.com/EPPlusSoftware/EPPlusSample.VB/blob/main/03-Styling/04-Create file system report/CreateAFileSystemReport.vb)