C# efcore 控制台实例

 public class DefaultDbContext : DbContext { public DefaultDbContext() { } public DbSet<User> Users { set; get; } public DbSet<UserDetail> UserDetails { get; set; } protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) { string sqlConnection = "server=127.0.0.1;port=3306;user=root;password=123456;database=efcoredemo"; optionsBuilder.UseMySql(sqlConnection); } protected override void OnModelCreating(ModelBuilder modelBuilder) { modelBuilder.ApplyConfiguration<User>(new UserConfiguration()); modelBuilder.ApplyConfiguration<UserDetail>(new UserDetailConfiguration()); base.OnModelCreating(modelBuilder); } } public class UserConfiguration : IEntityTypeConfiguration<User> { public UserConfiguration() { } public void Configure(EntityTypeBuilder<User> builder) { builder.ToTable("user"); builder.HasIndex(q => q.IdCard).IsUnique(); builder.HasOne(q => q.UserDetail).WithOne(q=>q.User).HasForeignKey<User>(q => q.userDetailId); } } public class UserDetailConfiguration : IEntityTypeConfiguration<UserDetail> { public UserDetailConfiguration() { } public void Configure(EntityTypeBuilder<UserDetail> builder) { builder.ToTable("userdetail"); builder.Property(q => q.Work).HasMaxLength(500); } } [Table("user")] public class User { [Key] public int Id { set; get; } [Required] public string IdCard { get; set; } [Column("sex")] public bool Sex { get; set; } [Column("name")] public string Name { set; get; } [Column("createTime")] public DateTime CreateTime { set; get; } = DateTime.Now; [Column("modifyTime")] public DateTime ModifyTime { set; get; } = DateTime.Now; [Column("userDetailId")] public int userDetailId { get; set; } public UserDetail UserDetail { get; set; } } [Table("userdetail")] public class UserDetail { [Key] public int Id { get; set; } [Column("email")] [StringLength(50)] public string Email { get; set; } [Column("phone")] [StringLength(20)] public string Phone { get; set; } [Column("note")] [StringLength(200)] public string Note { get; set; } [Column("lastLoginTime")] public DateTime LastLoginTime { get; set; } [Column("work")] public string Work { get; set; } public User User { get; set; } } class Program { static void Main(string[] args) { Console.WriteLine("Hello World!"); using (DefaultDbContext db = new DefaultDbContext()) { //db.Database.MigrateAsync(); //db.Database.EnsureCreated(); var list = db.Database.GetPendingMigrations(); if (list.Count() > 0) { db.Database.MigrateAsync(); } //var user = new User { Name = "张三", Sex = false, IdCard = "513701199109121331" }; //db.Users.Add(user); //db.SaveChanges(); //System.Console.Write(db.Users.ToList()); Console.ReadKey(); } } }