ASP.Net MVC 3 AutoMapper

Question

我正在开发一个ASP.Net MVC 3 Web应用程序使用实体框架4.1和Automapper将属性从我的对象映射到ViewModels，反之亦然。

我已经叫下面的类移

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; } 

} 

而一个视图模型称为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; } 

} 

然后我有下面的代码在一个控制器

[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，当变量'shift'首先被移位细节填充时，懒加载也是loa ds“地点”的相关集合。

但是，一旦映射发生，shift.Locations就等于0.有没有办法设置AutoMapper，它只是将ViewModel类中的属性映射到轮班而不移除位置集合？

非常感谢大家。

Answer 1

Automapper能够为创建的地图的特定成员指定选项。

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

试试这个：

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