Code First is a new development approach in the Entity Framework development stack. It enables the development of EDMs using only code and without the need for static .edmx files.

摘要

The EmployeeTypeConfiguration holds the same configuration that existed in the OnModelCreating method. The only difference is that you don't use the DbModelBuilder and its Entity generic method. The configurations are being done in the constructor of the configuration class. To wire the configuration to the DbModelBuilder, you'll have to use the Add method of the DbModelBuilder Configuration collection. The following line of code will do exactly that: Dbmodel Builder.Configurations.Add(new EmployeeTypeConfigurationo); Another configuration method in Code First is the use of the data annotations assembly. Data Annotations and Code First Integration Data annotations aren't a new concept. The System.Component Model.DataAnnotations assembly is being widely used in a lot of frameworks such as ASP.NET MVC, Dynamic Data, WCF RIA Services and more. The data annotations are attributes that decorate properties and classes. They offer the ability to put cross-cutting concerns like validations outside the scope of the domain model and to decorate the model in order to impose these concerns.