alternative to Tag in asp.net

Question

What is the alternative to winforms-style control.Tag in asp.net?

For example:

ListItem li = ListBox1.SelectedItem;    
Product prod = (Product) li.Tag;

How can I rewrite this in asp.net?

Answer 1

Basically, there isn't any easy way as far as I know. Because of the stateless nature of the web, you need to rely on your Session, ViewState or ControlState to store those details.

Here's an explanation of ViewState and ControlState.