ORM/EF

EF中的映射：
1、特性：
一、[Table("tableName")]
二、[Column("clnName")]
2、Mapping
一、建立一個映射類

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

二、在context中註冊mapping

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

3、直接指定
直接再context類中經過代碼指定

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();
        }