ORM/EF

EF中的映射：
一、特性：
1、[Table("tableName")]
2、[Column("clnName")]
二、Mapping
1、創建一個映射類

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

2、在context中註冊mapping

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

三、直接指定
直接再context類中通過代碼指定

 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();
        }