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It includes functionality such as student admission, course creation, and instructor assignments. The downloadable sample contains code in both C# and Visual Basic. NET MVC framework, see Getting Started with the Entity Framework using ASP. application structure that's more maintainable. To implement this architecture, you separate the presentation layer from the business logic layer (BLL) and the data access layer (DAL).There are three ways you can work with data in the Entity Framework: . For information about the differences between these workflows and guidance on how to choose the best one for your scenario, see Entity Framework Development Workflows. One way to implement this structure is to use the pages using a control that has many of the same features as other data-source controls.
The view will consist of just the data needed by the drop-down list: the full name (properly formatted) and the record key.You will begin by creating web pages in which the control to that class instead of to the repository class.You will also create unit tests for the validation logic.NET Web Forms applications using the Entity Framework 4.0 and Visual Studio 2010.The sample application is a website for a fictional Contoso University.This makes it possible for you to provide the business-logic class with a reference to any object that implements the repository interface.
For normal operation, you provide a repository object that works with the Entity Framework.
In some that includes both business logic and data-access logic.
In this tutorial you will create separate classes for business logic and for data-access logic.
For testing, you provide a repository object that works with data stored in a way that you can easily manipulate, such as class variables defined as collections.
The following illustration shows the difference between a business-logic class that includes data-access logic without a repository and one that uses a repository.
In the Foreign Key Relationships box click Add, then click the ellipsis for Tables and Columns Specification.