Hybrid application of session and hashtable in the shopping cart System

1. Define HT as hashtable
System. Collections. hashtable ht = new hashtable ();

2. Add shopping objects to hashtable, such as purchasing two books.

Ht. Add (book, 1)

3. Assign the HT to the session

Session ["bus"] = HT;

If you already have one, you can extract the value of HT [Book] first, and then add 1

HT [Book] = (INT) HT [Book] + 1;
Session ["bus"] = HT;

Hashtable can be directly used as a data source such as datalist.

For example, datalist. datasource = (hashtable) session ["bus"];
Datalist. databind ();

You can add a template to datalist.

<% # Databinder. eval (container. dataitem, "key") %> key indicates that the key in hasntable is the book in this example.

<% # Databinder. eval (container. dataitem, "value") %> value indicates that the value corresponding to the key in hasntable is the number of books in this example. 2

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