ASP.Net MVC 3 AutoMapper

Question

我正在開發一個ASP.Net MVC 3 Web應用程序使用實體框架4.1和Automapper將屬性從我的對象映射到ViewModels，反之亦然。

我已經叫下面的類移

public partial class Shift 
{ 
    public Shift() 
    { 
     this.Locations = new HashSet<ShiftLocation>(); 
    } 

    public int shiftID { get; set; } 
    public string shiftTitle { get; set; } 
    public System.DateTime startDate { get; set; } 
    public System.DateTime endDate { get; set; } 
    public string shiftDetails { get; set; } 

    public virtual ICollection<ShiftLocation> Locations { get; set; } 

} 

而一個視圖模型稱爲ViewModelShift

public class ViewModelShift 
{ 
    public int shiftID { get; set; } 

    [DisplayName("Shift Title")] 
    [Required(ErrorMessage = "Please enter a Shift Title")] 
    public string shiftTitle { get; set; } 

    [DisplayName("Start Date")] 
    [Required(ErrorMessage = "Please select a Shift Start Date")] 
    public DateTime startDate { get; set; } 

    [DisplayName("End Date")] 
    [Required(ErrorMessage = "Please select a Shift End Date")] 
    public DateTime endDate { get; set; } 

    [DisplayName("Shift Details")] 
    [Required(ErrorMessage = "Please enter detail about the Shift")] 
    public string shiftDetails { get; set; } 

    [DisplayName("Shift location")] 
    [Required(ErrorMessage = "Please select a Shift Location")] 
    public int locationID { get; set; } 

    public SelectList LocationList { get; set; } 

} 

然後我有下面的代碼在一個控制器

[HttpPost] 
    public ActionResult EditShift(ViewModelShift model) 
    { 
      if (ModelState.IsValid) 
      { 
       Shift shift = _shiftService.GetShiftByID(model.shiftID); 
       shift = Mapper.Map<ViewModelShift, Shift>(model); 
      } 
    } 

，工作正常，當變量'shift'首先被移位細節填充時，懶加載也是loa ds「地點」的相關集合。

但是，一旦映射發生，shift.Locations就等於0.有沒有辦法設置AutoMapper，它只是將ViewModel類中的屬性映射到輪班而不移除位置集合？

非常感謝大家。

Answer 1

Automapper能夠爲創建的地圖的特定成員指定選項。

https://github.com/AutoMapper/AutoMapper/wiki/Configuration-validation

試試這個：

Mapper.CreateMap<ViewModelShift, Shift>() 
     .ForMember(dest => dest.Locations, opt => opt.Ignore());