visual studio entity framework designer code first tutorial

Go back to the Ant Class and add a property for Size As Integer.

At Code First, we focus on the domain of our project and start creating model classes for your domain entity instead of designing. NET developers favor working with the Designer in Code EF or database first approach while some just prefer work with their code. which reduce complexity for developers to create application without having much more idea of Database. The Entity Framework introduced the Code-First approach. To overcome this issue Microsoft come up with the Entity Framework (EF). Let’s see what happens if we make changes to your database. We all know Databases is very important of any application, and some time its too complex to manage Databases. This tutorial describes how to create a Windows Forms Data Source from an Entity in an Entity Data Model using Microsoft Visual Studio. However, if you change the model class and then run the application with this initializer, it will throw an exception.ĭropCreateDatabaseIfModelChanges: This initializer drops an existing database and creates a new database, if your model classes (entity classes) have changed.ĭropCreateDatabaseAlways: As the name suggests, this initializer drops an existing database every time you run the application, irrespective of whether your model classes have changed or not.Ĭustom DB Initializer: You can also create your own custom initializer, if the above do not satisfy your requirements or you want to do some other process that initializes the database using the above initializer.

As the name suggests, it will create the database if none exists. The DbContext has four Initializers.ĬreateDatabaseIfNotExists: This is the default initializer. That's because the default initializer of a DbContext is CreateDatabaseIfNotExists. If you run your application again, you will see another list of ants added to the database.

Visual studio entity framework designer code first tutorial