Comments by Blackth_rn (Top 4 by date)

Sorry I misread your message. It doesn't show any error when I use your solution with .Value?.ToString(); it just prints it as a string

An error only appears when I try to convert to double. The one I get is: System.InvalidCastException: 'Unable to cast object of type 'System.String' to type 'System.Double'.' ETA - The error appears at the line: worksheet.Cells["B" + current_line_number].Value = (double)data_holder.Rows[i].Cells[0].Value;

Thank you for getting back to me! I didn't realize that null operators were a thing. I just tried your solution there but it still wants to be passed as a string.