Building an MVC 3 App with Code First and Entity Framework 4.1

Julie Lerman , March 2011.
Microsoft’s ADO.NET Entity Framework (EF) simplifies data access by allowing you to avoid working directly with the database in your code. Instead you can retrieve data by writing queries against strongly typed classes letting the Entity Framework handle the database interaction on your behalf. EF can also persist changes back to the database for you. In addition to this benefit, you will also benefit from the EF’s comprehension of relationships. This means you will not be required to write extra code to specify joins between entities whenexpressing queries or simply working with your objects in memory. EF provides you with three ways to describe the model of your entities. You can begin with a legacy database to create a model. You can design a model in a designer. Or you can simply define classes and let EF work with those. This last tactic is referred to as code first, because the first thing you do is write code to describe your entities. In this whitepaper, I will walk you through creating a simple MVC 3 application using Entity Framework’s code first technology to describe your classes and manage all of your data access.


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