ORM/EF

Posted 2020-12-26

EF中的映射：
一、特性：
1、[Table("tableName")]
2、[Column("clnName")]
二、Mapping
1、创建一个映射类

  public class USERTBMapping:EntityTypeConfiguration<USER>
    {
        public USERTBMapping()
        {
            this.ToTable("USERTB");
        }
    }

2、在context中注册mapping

 protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Configurations.Add(new USERTBMapping());
            throw new UnintentionalCodeFirstException();
        }

三、直接指定
直接再context类中通过代码指定

 protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            //modelBuilder.Configurations.Add(new USERTBMapping());
            //映射表名和列名
            modelBuilder.Entity<USER>().ToTable("USERTB")
                .Property(u => u.USERNM).HasColumnName("USERNAME");
            throw new UnintentionalCodeFirstException();
        }