1,安装环境：

如果是VS2015，确保已经升级至 update3或以上

.net core sdk (https://www.microsoft.com/net/download/core)

vs2015 tools

2,创建一个asp.net Core的项目

3,创建实体Entity,用户和角色

public class User    {        public int Id { get; set; }        /// 
        /// 角色Id        /// 
        public int RoleId { get; set; }        public virtual Role Role { get; set; }        /// 
        /// 状态        /// 
        public int Status { get; set; }        /// 
        /// 登陆名        /// 
        public string Login { get; set; }        /// 
        /// 登陆密码        /// 
        public string Pwd { get; set; }    }

public class Role    {        public int Id { get; set; }        /// 
        /// 角色名        /// 
        public string Name { get; set; }        /// 
        /// 一个角色的多个用户        /// 
        public virtual ICollection
     
       Users { get; set; }    }
     

4，创建DbContext

public class EFDbContext: DbContext    {        public EFDbContext(DbContextOptions
     
       options) : base(options)        { }        public DbSet
      
        Roles { get; set; }        public DbSet
       
         Users { get; set; }        protected override void OnModelCreating(ModelBuilder modelBuilder)        {            Role(modelBuilder);            User(modelBuilder);        }        private void User(ModelBuilder modelBuilder)        {            var userBuilder = modelBuilder.Entity
        
         ().ToTable("User");            // Properties            userBuilder.Property(t => t.Id).ValueGeneratedOnAdd();            userBuilder.Property(t => t.RoleId).IsRequired();            userBuilder.Property(t => t.Status).IsRequired();            userBuilder.Property(t => t.Login).IsRequired().HasMaxLength(30);            userBuilder.Property(t => t.Pwd).IsRequired().HasMaxLength(60);            // Primary Key            userBuilder.HasKey(t => t.Id);            // Index            userBuilder.HasIndex(t => t.Login);            // Relationships            userBuilder.HasOne(t => t.Role).WithMany(t => t.Users).HasForeignKey(t => t.RoleId);        }        private void Role(ModelBuilder modelBuilder)        {            var roleBuilder = modelBuilder.Entity
         
          ().ToTable("Role");            // Properties            roleBuilder.Property(t => t.Id).ValueGeneratedOnAdd();            roleBuilder.Property(t => t.Name).IsRequired().HasMaxLength(30);            // Primary Key            roleBuilder.HasKey(t => t.Id);        }    }
         
        
       
      
     

5，创建DbInitializer，用于创建初始数据

public class DbInitializer    {        public async static Task InitData(EFDbContext context)        {            if (context.Database != null && context.Database.EnsureCreated())            {                //角色配置                context.Roles.AddRange(new Role[]                {                    new Role { Name="超级管理员" },                    new Role { Name="管理员" }                });                //默认用户                context.Users.AddRange(new User[]                {                    new User { RoleId=1, Login="administrator", Pwd="111111" },                    new User { RoleId=2, Login="admin", Pwd="111111" }                });                await context.SaveChangesAsync();            }        }

6，修改Startup类方法

在ConfigureServices添加如下代码

// DbContextservices.AddDbContext
     
      (options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
     

在Configure方法内添加

public async void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)        {            loggerFactory.AddConsole(Configuration.GetSection("Logging"));            loggerFactory.AddDebug();            app.UseMvc();            await DbInitializer.InitData(app.ApplicationServices.GetService
     
      ());        }
     

7，修改appsettings.json

{  "ConnectionStrings": {    "DefaultConnection": "Data Source=.;Initial Catalog=LniceCore;Integrated Security=SSPI;"  },  "Logging": {    "IncludeScopes": false,    "LogLevel": { "Default": "Debug", "System": "Information", "Microsoft": "Information" } } }

8，运行程序，查看结果