策略一:数据库不存在时重新创建数据库
程序代码
Database.SetInitializer<testContext>(new CreateDatabaseIfNotExists<testContext>());
策略二:每次启动应用程序时创建数据库
程序代码
Database.SetInitializer<testContext>(new DropCreateDatabaseAlways<testContext>());
策略三:模型更改时重新创建数据库
程序代码
Database.SetInitializer<testContext>(new DropCreateDatabaseIfModelChanges<testContext>());
策略四:从不创建数据库
程序代码
Database.SetInitializer<testContext>(null);
Entity Framework数据库初始化示例
程序代码
using System.Data.Entity; using System.Data.Entity.Infrastructure; using Web.Models.Mapping;
namespace Web.Models { public class testContext : DbContext { static testContext() { Database.SetInitializer<testContext>(null); }
public testContext() : base("Name=testContext") { }
public DbSet<Person> People { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Configurations.Add(new PersonMap()); } } }
namespace Web.Models { public class testContext : DbContext { static testContext() { Database.SetInitializer<testContext>(null); }
public testContext() : base("Name=testContext") { }
public DbSet<Person> People { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder) { modelBuilder.Configurations.Add(new PersonMap()); } } }