[2005] job cart/shopping cart

[MARKBD]

Hello all,
i'm doing a library management system using VS 2005 c#.net for my eduaonal purpose.
here i want to use cart like shopping cart/job cart.

here Student will select books, then they will save books in cart. Then system will ask for user ID & password. if they provide then save books in their cart, i already did this, problem is:if they dont have userID i redirect them in log-in page (where normally user can login also without selecting book). But when they create new user how do i can get their selected books and how i can track that this user selected books so that i need to save books according newly created users??
Please give me idea's..if possible code also.
Thanks

[ZeBula8]

i'm assuming you have to have a class that holds these books, along with the userid you're using (sessionID perhaps?)
you can save this class Book to a List that's attached to the sessionID, and then when new user is created, and logs in, attach the List to this new user.

[mendhak]

How are you currently maintaining your cart? It must either be in a cookie or in a session variable. In either case, once they login, you only need to re-read the values in the cookie or session variable.