对象的地图集合

Question

我第一次尝试将 Automapper 引入应用程序，但我不断收到错误消息，提示我有一些无效参数。

我的模特：

namespace StoreGradesLib.Models
{
    public class Store
    {
        [Key]
        public int StoreID { get; set; }

        [Required]
        [MaxLength(120)]
        public string StoreName { get; set; }

        [Required]
        [MaxLength(20)]
        public string StoreNumber { get; set; }

        [Required]
        [MaxLength(120)]
        public string ManagerName { get; set; }

        [Required]
        public long PhoneNumber { get; set; }

        [Required]
        public string AddressLine1 { get; set; }

        public string AddressLine2 { get; set; }

        [Required]
        public string Postcode { get; set; }

        [Required]
        public int WallArea { get; set; }

        [Required]
        public int FloorArea { get; set; }

        [Required]
        public int NumWindows { get; set; }

        [Required]
        public int NumDesks { get; set; }

        [Required]
        public int NumDoors { get; set; }

        [Required]
        public int StoreGradeID { get; set; }

        [Required]
        public bool Active { get; set; }

        public virtual StoreGrade StoreGrade { get; set; }

        [Timestamp]
        public Byte[] Timestamp { get; set; }
    }
}

我的视图模型：

namespace StoreGradesLib.ViewModels
{
    public class StoreVM
    {
        public int StoreID { get; set; }
        public bool Active { get; set; }
        public Byte[] Timestamp { get; set; }

        [Required(ErrorMessage = "Store Name is required.")]
        [Display(Name = "Store Name")]
        public string StoreName { get; set; }

        [Required(ErrorMessage = "Store Number is required")]
        public string StoreNumber { get; set; }

        [Required(ErrorMessage = "Store Manager is required.")]
        [Display(Name = "Manager Name")]
        public string ManagerName { get; set; }

        [Required(ErrorMessage = "Contact Number is required.")]
        [Display(Name = "Phone Number")]
        public int PhoneNumber { get; set; }

        [Required(ErrorMessage = "Address Line 1 is required.")]
        [Display(Name = "Address Line 1")]
        public string AddressLine1 { get; set; }

        [Display(Name = "Address Line 2")]
        public string AddressLine2 { get; set; }

        [Required(ErrorMessage = "Postcode is required.")]
        public string Postcode { get; set; }

        [Required(ErrorMessage = "Must input wall area.")]
        [Display(Name = "Wall Area")]
        public int WallArea { get; set; }

        [Required(ErrorMessage = "Must input floor area.")]
        [Display(Name = "Floor Area")]
        public int FloorArea { get; set; }

        [Required(ErrorMessage = "Must input number of windows.")]
        [Display(Name = "Windows")]
        public int NumWindows { get; set; }

        [Required(ErrorMessage = "Must input number of desks.")]
        [Display(Name = "Desks")]
        public int NumDesks { get; set; }

        [Required(ErrorMessage = "Must input number of doors.")]
        [Display(Name = "Doors")]
        public int NumDoors { get; set; }

        [Required(ErrorMessage = "Store must have a grade.")]
        public StoreGrade StoreGradeID { get; set; }

        public string Address
        {
            get
            {
                return StoreName + " " + AddressLine1 + " " + AddressLine2 + " " +                 Postcode;
            }
        }
    }
}

创建的映射：

CreateMap<Store, StoreVM>();
CreateMap<StoreVM, Store>();

在我的控制器中，我正在尝试将选择的商店映射到 storeVM。我目前正在购买我的商店；

var stores = db.Store.Include(s => s.StoreGrade);
stores = from s in db.Store.Where(s => s.Active.Equals(true))
                 select s;

我想将商店的选择映射到 StoreVM，我尝试了以下方法，但收到无效参数警告，

var VMstores = Mapper.Map<Store, StoreVM>(stores);

我收到最佳重载方法匹配有一些无效参数的错误。

谁能指出我正确的方向？

Answer 1

您正在映射集合，而不是单个实体（IEnumerable<Store> 到 IEnumerable<StoreVM>），因此请使用此映射

var VMstores = Mapper.Map<IEnumerable<Store>, IEnumerable<StoreVM>>(stores);

Answer 2

更新！ Now you can do this:

var VMstores = stores.Project().To<StoreVM>();