Hi,
If you need to input your desired data manually into your template sheet’s specific cells, you may simply use Cell.PutValue, Cell.Value or other corresponding attributes or methods for your needs. If you need to import data from any data source, e.g Array, DataTable, List etc. to your template, then you may use Aspose.Cells’ data import options to accomplish your task in one go. See the documents for your reference especially:
Hope, this helps.
Let me know if you still have any confusion or concerns or I have not understood you properly.
Thank you.