Below are the ways (assuming you are talking about 2 aspx pages) that comes right now on top of my head.
String can be passed using - QueryString, PostBack, Cookies, Session, Cache, Application, Database
Object (Assuming DTO object not serialized) can be passed using - Session, Application, Cache
DataSet is a kind of object and same applies as Object.
Other members can add some more ways that I might have missed :)
ThanksKarthikanbarasan, if this helps please login to Mark As Answer. | Alert Moderator