Hi Rich,
Thank you for your interest in Syncfusion products.
Yes, it is possible to import an Excel file as datatable by using both ColumnNames and ComputedFormulaValues. You can check the sample demonstrating this behavior in the link below:
http://files.syncfusion.com/support/samples/XlsIO.Web/7.3.0.20/F88636/main.htmPlease try running the sample and let me know if you have any questions.
Regards,
Geetha