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Share Facebook LinkedIn Email. Explore premium templates Bring your ideas to life with more customizable templates and new creative options when you subscribe to Microsoft Engagement wedding celebration card. Compilation album covers. Scenic Facebook banners. Swiss design cover letter. What's new in this version First release. Features Listing items Adding items to a list. Additional information Published by Siebe Verschaeve.

Published by Siebe Verschaeve. Developed by Siebe Verschaeve. Approximate size Age rating For all ages. Category Shopping. This app can Access your Internet connection. Permissions info. Installation Get this app while signed in to your Microsoft account and install on up to ten Windows 10 devices. Language supported English United States. Publisher Info Shopping Cart list support. Additional terms Terms of transaction. This tutorial series will teach you the basics of building an ASP.

NET 4. A Visual Studio project with C source code is available to accompany this tutorial series. This tutorial describes the business logic required to add a shopping cart to the Wingtip Toys sample ASP.

NET Web Forms application. When you've completed this tutorial, the users of your sample app will be able to add, remove, and modify the products in their shopping cart. Earlier in this tutorial series, you added pages and code to view product data from a database.

In this tutorial, you'll create a shopping cart to manage the products that users are interested in buying. Users will be able to browse and add items to the shopping cart even if they are not registered or logged in. To manage shopping cart access, you will assign users a unique ID using a globally unique identifier GUID when the user accesses the shopping cart for the first time. NET Session state.

The ASP. NET Session state is a convenient place to store user-specific information which will expire after the user leaves the site. While misuse of session state can have performance implications on larger sites, light use of session state works well for demonstration purposes.

The Wingtip Toys sample project shows how to use session state without an external provider, where session state is stored in-process on the web server hosting the site. For larger sites that provide multiple instances of an application or for sites that run multiple instances of an application on different servers, consider using Windows Azure Cache Service.

This Cache Service provides a distributed caching service that is external to the web site and solves the problem of using in-process session state. Earlier in this tutorial series, you defined the schema for the category and product data by creating the Category and Product classes in the Models folder.

Now, add a new class to define the schema for the shopping cart. Later in this tutorial, you will add a class to handle data access to the CartItem table. This class will provide the business logic to add, remove, and update items in the shopping cart. The Add New Item dialog box is displayed. Select Code , and then select Class. The CartItem class contains the schema that will define each product a user adds to the shopping cart.

This class is similar to the other schema classes you created earlier in this tutorial series. However, the code overrides the default behavior by using the data annotation [Key] attribute. The CartId property specifies the ID of the user that is associated with the item to purchase. You'll add code to create this user ID when the user accesses the shopping cart.

NET Session variable. In addition to adding the CartItem class, you will need to update the database context class that manages the entity classes and that provides data access to the database. To do this, you will add the newly created CartItem model class to the ProductContext class. In Solution Explorer , find and open the ProductContext. As mentioned previously in this tutorial series, the code in the ProductContext. Entity namespace so that you have access to all the core functionality of the Entity Framework.

This functionality includes the capability to query, insert, update, and delete data by working with strongly typed objects. The ProductContext class adds access to the newly added CartItem model class. Next, you'll create the ShoppingCart class in a new Logic folder. The ShoppingCart class handles data access to the CartItem table. The class will also include the business logic to add, remove, and update items in the shopping cart.

The shopping cart logic that you will add will contain the functionality to manage the following actions:. A shopping cart page ShoppingCart. The shopping cart page will display all the items the user adds to the shopping cart. Besides the shopping cart page and class, you'll create a page AddToCart. You will also add code to the ProductList. The following diagram shows the basic process that occurs when the user adds a product to the shopping cart.

The AddToCart. The ShoppingCart. The ShoppingCart class will be added to a separate folder in the application so that there will be a clear distinction between the model Models folder , the pages root folder and the logic Logic folder. Name the new folder Logic. The AddToCart method enables individual products to be included in the shopping cart based on the product ID.

The product is added to the cart, or if the cart already contains an item for that product, the quantity is incremented. The cart ID is used to track the items that a user has in their shopping cart. If the user does not have an existing cart ID , a new cart ID is created for them.