Keeping data in the client side in ListGrid

Hi all,

Im new in this, so I need some help.
The thing is that I need to store(save) some data temporarily in the client side using a GridList, is that possible?

Example:
Suppose that is a List from products, and I want to order some of them. So I decided to check just 4 products (records), if I want to search another product (because is a list of 1000 products) when I try to do that, I message tells me:

"This action will discard all unsaved edited values for this list."

After I search and choose the last product, when I remove the filter my products that I previously chose are not selected!! They lost their value(quantity to order) and the check field is not checked!


Where in the SC API I can learn to do that?
I don't want to store that in the database because I consider innecesary if its only this functionality.

Thanks in advance.