Group by on datatable

I try to groupby columns and get sum on 1 excel. Now I read the excel to datatable and use BalaReva.DataTable.Activities.Group By Aggregation. and got runtime error:

image

Any idea on other ways to do this?Thanks!

Hey @cllrebecca

Check this existing thread : - DataTable Select function cannot perform “=” operation on System.Double and System.String

Regards…!!
Aksh