Question

嗨，我对Linq有一个大问题。我必须做0。这两个类中的.1对一关联：

[Table(Name = "TB_Points")]
public class Point
{
        private int _ID = 0;
        [Column(Storage = "_ID", DbType = "Int NOT NULL IDENTITY", IsPrimaryKey = true, IsDbGenerated = true)]
        public int ID { get { return this._ID; } }
}

[Table(Name = "TB_TimePoint")]
public class TimePoint
{
        private int _ID = 0;
        [Column(Storage = "_ID", DbType = "Int NOT NULL IDENTITY", IsPrimaryKey = true, IsDbGenerated = true)]
        public int ID { get { return this._ID; } }

        //here is the association
        public Point Pos { get; set; }
}

Point是我的通用类，因此有时候Point可以在没有TimePoint的情况下存在，因此关联中存在null。而且我不需要知道Point类中的TimePoint。我所有的尝试都失败了我不知道问题是在IsDbGenerated = true还是在其他东西中。请帮忙。 THX

Answer 1

典型的方法是使TimePoint的主键也成为Point主键的外键。

Linq 0..1-一个协会

1 个答案: