EFCodeFirst示例

1、定义一个基础模板类

namespace WebApplication1.Models
{
    /// <summary>
    ///     可持久到数据库的领域模型的基类。
    /// </summary>
    [Serializable]
    public abstract class EntityBase<TKey>
    {
        #region 构造函数

        /// <summary>
        ///     数据实体基类
        /// </summary>
        protected EntityBase()
        {
            IsDeleted = false;
            AddDate = DateTime.Now;
        }

        #endregion

        #region 属性

        [Key]
        public TKey Id { get; set; }

        /// <summary>
        ///获取或设置 获取或设置是否禁用，逻辑上的删除，非物理删除
        /// </summary>
        public bool IsDeleted { get; set; }

        /// <summary>
        ///     获取或设置 添加时间
        /// </summary>
        [DataType(DataType.DateTime)]
        public DateTime AddDate { get; set; }

        #endregion
    }
}

2、定义实体类

namespace WebApplication1.Models
{
    public partial class SystemAreas : EntityBase<string>
    {
        public SystemAreas()
        {
            this.ChildSystemAreas = new HashSet<SystemAreas>();
        }

        public string Name { get; set; }
        public string ParentId { get; set; }

        public virtual ICollection<SystemAreas> ChildSystemAreas { get; set; }
        public virtual SystemAreas ParentSystemAreas { get; set; }
    }
}

3、插入数据

public ActionResult Index()
{
    SystemAreas sa = new SystemAreas()
    {
        Id="",
        Name = "test"
    };
    TestDbContext db = new TestDbContext();
    db.Set<SystemAreas>().Add(sa);
    db.SaveChanges();

    return View();
}