我有以下域对象:
public class DomainClass
{
public int Id { get; set; }
public string A { get; set; }
public string B { get; set; }
}
我有以下两个要映射到的对象:
public class Parent
{
public int Id { get; set; }
public string A { get; set; }
public Child Child { get; set; }
}
public class Child
{
public int Id { get; set; }
public string B { get; set; }
}
我设置了以下地图:
Mapper.CreateMap<DomainClass, Parent>();
Mapper.CreateMap<DomainClass, Child>();
如果我使用以下调用映射我的对象,则parent.Child属性为空。
var domain = GetDomainObject();
var parent = Mapper.Map<DomainClass, Parent>(domain); // parent.Child is null
我知道我可以写以下内容:
var domain = GetDomainObject();
var parent = Mapper.Map<DomainClass, Parent>(domain);
parent.Child = Mapper.Map<DomainClass, Child>(domain);
有没有办法可以消除第二次调用并让 AutoMapper 为我做这件事?
您只需在映射中指定即可:
Mapper.CreateMap<DomainClass, Child>();
Mapper.CreateMap<DomainClass, Parent>()
.ForMember(d => d.Id, opt => opt.MapFrom(s => s.Id))
.ForMember(d => d.A, opt => opt.MapFrom(s => s.A))
.ForMember(d => d.Child,
opt => opt.MapFrom(s => Mapper.Map<DomainClass, Child>(s)));
更新:
对于最新的 Automapper,请参阅 @prostynick 的回答 -
只需使用 self 来映射孩子。使用 AutoMapper 6.1.1 进行测试。
CreateMap<DomainClass, Child>(); CreateMap<DomainClass, Parent>() .ForMember(d => d.Child, opt => opt.MapFrom(s => s));
只需使用 self 来映射孩子。使用 AutoMapper 6.1.1 进行测试。
CreateMap<DomainClass, Child>();
CreateMap<DomainClass, Parent>()
.ForMember(d => d.Child, opt => opt.MapFrom(s => s));
在 Automapper 5.0 及更高版本中,如果您使用 Profile 创建映射器:
public class OrderMapper : Profile
{
public OrderMapper()
{
CreateMap<Order, OrderDto>(MemberList.None)
.ForMember(dest => dest.OrderId,
opts => opts.MapFrom(src => src.OrderId))
.ForMember(dest => dest.OrderDate,
opts => opts.MapFrom(src => src.OrderDate))
.ForMember(dest => dest.OrderedBy,
opts => opts.MapFrom(src => src.OrderedBy))
.ForMember(dest => dest.ItemsDto,
opt => opt.MapFrom(src => src.Items));
}
}
目的地
ItemsDto
是:
public List<OrderItemDto> ItemsDto { get; set; }
源项目是:
public List<OrderItem> Items { get; set; }
然后为子项/属性创建映射器配置文件:
public class OrderItemMapper : Profile
{
public OrderItemMapper()
{
CreateMap<OrderItem, OrderItemDto>(MemberList.None)
.ForMember(dest => dest.ItemId,
opts => opts.MapFrom(src => src.ItemId))
.ForMember(dest => dest.ItemPrice,
opts => opts.MapFrom(src => src.ItemPrice))
.ForMember(dest => dest.Name,
opts => opts.MapFrom(src => src.Name))
.ForMember(dest => dest.Quantity,
opts => opts.MapFrom(src => src.Quantity))
.ForMember(dest => dest.ItemTotal,
opts => opts.MapFrom(src => src.ItemTotal));
}
}
试试这个方法:
_Mapper.Map<DomainClass, Child>();
_Mapper.Map<DomainClass, Parent>()
.ForMember(d => d.Child, opt => opt.MapFrom(s => s));