paging with datareaders

[Mike Smith]

Hey people,

When a datareader is used for paging with a datagrid in asp.net, we have to
use the custom paging method ?

How do we find out the total records returned from the datareader itself ?

Any samples of using the grid with datareaders to achieve efficient paging ?
Efficient here meaning it fetches only 10 records each time a page is
requested and not all the records at one time.

Regards,
Mike.