Client-side state management summary

Method	Use when
Cookies	You need to store small amounts of information on the client and security is not an issue.
View state	You need to store small amounts of information for a page that will post back to itself. Use of the ViewState property does supply semi-secure functionality.
Hidden fields	You need to store small amounts of information for a page that will post back to itself or another page, and security is not an issue. Note   You can use a hidden field only on pages that are submitted to the server.
Query string	You are transferring small amounts of information from one page to another and security is not an issue. Note   You can use query strings only if you are requesting the same page, or another page via a link.