1 在config文件添加数据库连接字符串，要求name是继承DbContext的类名字。

public partial class SchoolContext : DbContext,IDisposable

 <connectionStrings>
    <add name="SchoolContext" connectionString="server=CHINA-BF77E9EA9\SQL2005;database=school;uid=sa;pwd=123.com"
         providerName ="System.Data.SqlClient"/>
  </connectionStrings>

2  public class SchoolContextInitializer :CreateDatabaseIfNotExists <SchoolContext>
    {
        protected override void Seed(SchoolContext context)
  　　{

　　}

}

3

public partial class SchoolContext : DbContext,IDisposable
    {
        public SchoolContext()
        { }
        modelBuilder)
        {
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
            System.Data.Entity.Database.SetInitializer<SchoolContext>(new SchoolContextInitializer());
        }
    }