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The pages you create in this tutorial work with the entity set of the data model that you created in the Getting Started tutorial series.
You will begin this tutorial by making two changes to the database, both of which require corresponding changes to the data model that you created in the Getting Started with the Entity Framework and Web Forms tutorials.
For example, you can perform logging every time an entity is updated, archive data whenever an entity is deleted, or automatically check and update related data as needed when inserting a row with a foreign key value. For example, when you update a department, you might need to validate that no other departments have the same administrator because one person cannot be administrator of more than one department.
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.
You will begin by creating web pages in which the control to that class instead of to the repository class.
Like the Getting Started series, this tutorial series uses the ASP. The control gives you more flexibility in other ways as well.
NET Web Forms model and assumes you know how to work with ASP. Because you write your own data-access code, it's easier to do more than just read, insert, update, or delete a specific entity type, which are the tasks that the control is designed to perform.