Entity Framework Database Initialization four strategies

Policy one: Re-create the database when the database does not exist

1 database.setinitializer<testcontext> (new createdatabaseifnotexists<testcontext> ( ));

Policy two: Create a database each time the application is started

1 database.setinitializer<testcontext> (new dropcreatedatabasealways<testcontext> () );

Policy three: Re-creating the database when the model changes

1 database.setinitializer<testcontext> (new dropcreatedatabaseifmodelchanges< Testcontext> ());

Strategy Four: Never create a database

1 database.setinitializer<testcontext> (null);

Entity Framework Database Initialization Example

1 usingSystem.Data.Entity;2 usingSystem.Data.Entity.Infrastructure;3 usingWeb.Models.Mapping;4 5 namespaceWeb.models6 {7      Public classTestcontext:dbcontext8     {9         StaticTestContext ()Ten         { OneDatabase.setinitializer<testcontext> (NULL); A         } -  -          PublicTestContext () the:Base("Name=testcontext") -         { -         } -  +          Publicdbset<person> people {Get;Set; } -  +         protected Override voidonmodelcreating (Dbmodelbuilder modelBuilder) A         { atMODELBUILDER.CONFIGURATIONS.ADD (NewPersonmap ()); -         } -     } -}

Entity Framework Database Initialization four strategies