userdeatil in gridview

Question

i want logic of (online visitors , active user & downloads) in asp.net

1-which user have downloaded the pdf (in gridview) suppose 10 users downloaded pdf then which 10 user were they

2-which user have visited website in a day(in gridview) suppose 50 users visited in a day then which 50 user were they

3-which are active user(in gridview)suppose 20 users are active on website then which 20 user were they