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TextBoxShape Apply Color Or Bold to text

I am looking for a way to apply Color or Boldness to specific text inside of a ITextBoxShape. Does anyone know how to possibly do this. 

I need to be able to do something like 


RED text

regular text

1 Reply 1 reply marked as answer

KK Konduru Keerthi Konduru Ravichandra Raju Syncfusion Team March 28, 2023 12:24 PM UTC

Hi Fernando,

Yes. You can format the text of a text box through Syncfusion XlsIO. We have given below, a simple code snippet to achieve this.

Code Snippet:

using (ExcelEngine excelEngine = new ExcelEngine())


    IApplication application = excelEngine.Excel;

    application.DefaultVersion = ExcelVersion.Excel2013;

    IWorkbook workbook = application.Workbooks.Create(1);

    IWorksheet sheet = workbook.Worksheets[0];


    ITextBoxShape textbox = sheet.TextBoxes.AddTextBox(2, 2, 30, 200);

    textbox.Text = "TextBox";


    IRichTextString richText = textbox.RichText;

    IFont font = workbook.CreateFont();

    font.Bold = true;

    font.RGBColor = Color.Red;

    richText.SetFont(0, 6, font);


    //Saving the Excel to the MemoryStream

    MemoryStream stream = new MemoryStream();



    //Set the position as '0'.

    stream.Position = 0;


    //Download the Excel file in the browser

    FileStreamResult fileStreamResult = new FileStreamResult(stream, "application/excel");

    fileStreamResult.FileDownloadName = "Output.xlsx";

    return fileStreamResult;




Marked as answer
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