在Entities:DbContext里添加如下代码：

protected override void OnModelCreating(DbModelBuilder modelBuilder)        {            modelBuilder.Entity
     
      ().HasRequired(b => b.User).WithMany(a => a.Accounts).WillCascadeOnDelete(true);            base.OnModelCreating(modelBuilder);        }
     

这里Account是从表，User是主表

public class User    {        [Key]        [DisplayName("用户编号")]        public string UserCode { get; set; }        [DisplayName("用户账号")]        public string UserAccount { get; set; }        [DisplayName("用户密码")]        public string Password { get; set; }        public  List
     
       Accounts { get; set; }    }
     

public class Account    {        [Key]        public int Id { get; set; }        [DisplayName("编码")]        public string UserCode { get; set; }        [DisplayName("输入者")]        public string Inputer { get; set; }        public virtual User User { get; set; }    }