Question

我有上下文db类：

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;
using System.Linq;
using System.Web;

namespace MvcApplication.Models {
    public class PeopleContextDb : DbContext {

        public PeopleContextDb() : base("PeopleContextDb") { }

        public DbSet<Person> People { get; set; }
        public DbSet<Meeting> Meetings { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder) {
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        }
    }
}

我有这个类（我有正确的命名空间）：

using MvcApplication.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace MvcApplication.App_Start {
    public class PeopleInitilizer : System.Data.Entity.DropCreateDatabaseIfModelChanges<PeopleContextDb> {
        protected override void Seed(PeopleContextDb context) {
            var people = new List<Person> { 
             new Person{FirstName = "John", LastName = "Doe", CellNumber = "123-456-789", SecondaryPhoneNumber = "98873213", Address = "1street 2",BirthDate = DateTime.Now, Pesel = "312312312", Notes = "Annoying"},
             new Person{FirstName = "Anna", LastName = "Doe", CellNumber = "123-456-789", SecondaryPhoneNumber = "98873213", Address = "1street 2",BirthDate = DateTime.Now, Pesel = "548555672", Notes = "Less Annoying"}
            };

            people.ForEach(person => context.People.Add(person));
            context.SaveChanges();
        }
    }
}

但是我的项目中还没有数据库如何生成一个？

我添加了连接字符串：

<connectionStrings>
    <add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;AttachDbFilename=|DataDirectory|\aspnet-MvcApplication-20140710053828.mdf;Initial Catalog=aspnet-MvcApplication-20140710053828;Integrated Security=True"
      providerName="System.Data.SqlClient" />
    <add name="PeopleContextDb"    connectionString="Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Movies.mdf;Integrated Security=True" providerName="System.Data.SqlClient"/>
  </connectionStrings>

Answer 1

您可以使用 Code First Migrations 技术使用Entity Framework创建和更新数据库文件。在将数据库部署到生产环境之前，这种使数据库与数据模型保持同步的方法很有效。

此过程涉及三个步骤，您已经完成了第一个步骤：

建立初始模型＆amp;数据库
启用迁移
生成＆amp;运行迁移

有两篇关于Code First Migration方法的好文章，您可以从以下链接中找到：

Code First Migrations and Deployment with the Entity Framework in an ASP.NET MVC Application

Code First Migrations

如果已经有模型和上下文，如何在MVC 5中创建数据库？

1 个答案: