Hi Mike,
Thanks for your interest in Syncfusion products.
As you have reported, we have created the sample for your reference. Please refer the below online documentation and samples link for further details. Could you please try the same and let us know if this helps you.
Spreadsheet Creation sample:
CreateSpreadSheetSample.zipPivot Table Sample:
PivotTableSampleOnline documentation:
Online documentationPlease let us know if you have any clarifications.
Regards,
Zakeer Ahamed.S