EF查看SQL2种方式 和 映射

原文网址：https://www.cnblogs.com/wangdash/p/12342471.html
  /// EF查看SQL2种方式  
            /// 1. 通过数据库的sqlprofiler   
            /// 2.  context.Database.Log += s => Console.WriteLine($"当前执行sql:{s}");
            using (CodeFirst context = new CodeFirst())
            {
                context.Database.Log += s => Console.WriteLine($"当前执行sql:{s}");
                Llogin l_Login = context.L_login.Find(1);
                Llogin l_login1 = context.L_login.Where(l => l.id1 == 3).FirstOrDefault();
            }

    //1. 特性映射
    [Table("L_login")]
    public partial class Llogin
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        
        [StringLength(50)]
        public string name1 { get; set; }
    }
    //2.OnModelCreating完成链式映射
     protected override void OnModelCreating(DbModelBuilder modelBuilder)
     {
         modelBuilder.Entity<Llogin>().ToTable("L_login").Property(n => n.name1).HasColumnName("name");
      }
    //3. 映射类文件
    public class LloginMapping : EntityTypeConfiguration<Llogin>
    {
        public LloginMapping()
        {
            this.ToTable("L_login");
            this.Property(c => c.name1).HasColumnName("name");
        }
    }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
         modelBuilder.Configurations.Add(new LloginMapping());
    }