Question about round trip & datagrid

[alegria_de_la_huerta2003]

Hi

The question is simple for expert, but I'm not expert; I'm just
begining ASP .NET.

I have a datagrid on a webform and searching criteria. The output could
be moreless 5000, sometimes only 1 row. I have done the following:

1- Get all rows
2- Every time the user goes forward o backward, use another grid, and
not get from server.

Now I hesitate if will be better go every page of results to server or
use less round trip.

Wich one is the best option?

Regards,
Alegria