Hi Phil,
Thank you for your interest in Syncfusion products.
Yes, Our XlsIO support multiple colored text within an excel cell. We have provided the sample with code snippet below for your reference.
Sample : RichTextString.zip
Code Snippet [C#]:
//Insert Rich Text
IRange range = worksheet.Range["C3"];
range.Text = "Employee John Smith";
IRichTextString rtf = range.RichText;
//Formatting the text
IFont fontGray = workbook.CreateFont();
fontGray.Size = 16;
fontGray.Bold = true;
fontGray.Italic = true;
//grey color
fontGray.RGBColor = System.Drawing.Color.FromArgb(255, 192, 192, 192);
rtf.SetFont(0, 7, fontGray);
IFont fontRed = workbook.CreateFont();
fontRed.Size = 12;
fontRed.Bold = false;
fontRed.Italic = false;
//red color
fontRed.RGBColor = System.Drawing.Color.FromArgb(255, 255, 0, 0);
rtf.SetFont(9, 18, fontRed);
Please refer XlsIO Formatting sample in Syncfusion Essential studio dashboard.
Dashboard location : $system drive:\Program Files\Syncfusion\Essential Studio\10.3.0.43\Samples\
To know more details on Rich Text please refer this online link : http://help.syncfusion.com/Reporting/XlsIO/WPF
Please let us know if you require any further clarifications.
Regards,
Mahajothi.