System.collections.generic.ienumerable<> copytodatatable()

hi all, is there anyway to count rows of a variable whose type is system.collections.generic.ienumerable<>?, i use copytodatatable() to convert it to datatable and want to write range in an excel, but since there is no qualified rows, it shows an error:Write line : The source contains no DataRows. how to solve this? i then use if to put condition like"exception.copytodatatable() is nothing", it still shows this error, could sb share some solution? many thanks.

Assuming your ienumerable name is “enum”

You can use enum.Count()//int or enum.Any()//boolean

For datatable - dt.Rows.Count( tostring in messagebox)

thanks,it works