Map collection of objects

Question

I am trying to introduce Automapper into an application for the first time, but I keep getting an error saying I have some invalid arguments.

My model:

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; }     } } 

My View Model:

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;             }         }     } } 

Created mappings:

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

Within my controller, I am trying to map a selection of stores to storeVM. I am currently getting my stores as so;

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

I am wanting to map the selection of stores to StoreVM, I have tried the following, but i get an invalid parameters warning,

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

I am receiving the error that the best overloaded method match has some invalid arguments.

Can anyone point me in the right direction?

Answer 1

You are mapping collections, not single entities (IEnumerable<Store> to IEnumerable<StoreVM>), so use this mapping

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

Answer 2

Update! Now you can do this:

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