DW5S/DW5S.Entity/BaseEntity.cs

using Microsoft.EntityFrameworkCore;
using System.ComponentModel.DataAnnotations;
using System.Xml.Linq;

namespace DW5S.Entity
{
    [Index(nameof(UpdateTime))]
    public abstract class BaseEntity
    {
        public BaseEntity()
        {
            this.CreateTime = DateTime.Now;
            this.UpdateTime = DateTime.Now;
        }

        [Key]
        [Display(Name = "编号")]
        public int Id { get; set; }

        [Display(Name = "创建时间")]
        [DisplayFormat(DataFormatString = "yyyy-MM-dd HH:mm:ss")]
        public DateTime CreateTime { get; set; }

        [Display(Name = "更新时间")]
        [DisplayFormat(DataFormatString = "yyyy-MM-dd HH:mm:ss")]
        public DateTime UpdateTime { get; set; }
    }

    public abstract class BaseEntityLong : BaseEntity
    {
        public BaseEntityLong()
        {
            this.CreateTime = DateTime.Now;
            this.UpdateTime = DateTime.Now;
        }

        [Key]
        [Display(Name = "编号")]
        public new long Id { get; set; }
    }
}