最终,我试图从车辆视图模型 ->车辆映射。来源下面列出。值得注意的是,每个类别的两个属性都是不同类型的事实。
执行映射的代码
var newVehicle = Mapper.Map<Vehicle>(vehicleData_);
映射课程的代码 公共类车辆视图模型 { 公共车辆ViewModel() {
}
//Fuel Economy is in L/Km
public float CityFuelEconomy {get;set;}
public float HighwayFuelEconomy {get;set;}
public float ListPrice {get;set;}
public float SoldPrice{get;set;}
[Required]
public int ModelForeignKey {get;set;}
[Required]
public int DealerForeignKey{get;set;}
public string Notes{get; set;}
public string Color{get; set;}
}
public class Vehicle
{
public Vehicle()
{
}
[Key]
public int Id {get; set;}
//Fuel Economy is in L/Km
public float CityFuelEconomy {get;set;}
public float HighwayFuelEconomy {get;set;}
public float ListPrice {get;set;}
public float SoldPrice{get;set;}
[ForeignKey("VehicleModelId")]
public virtual VehicleModels ModelForeignKey {get;set;}
[ForeignKey("VehicleDealerId")]
public virtual Dealer DealerForeignKey{get;set;}
public string Notes{get; set;}
public string Color{get; set;}
}
要处理具有不同类型类型的属性的映射,我在Automapper配置(startup.cs)
中使用了以下"表单"Mapper.Initialize(config =>
{
config.CreateMap<VehicleViewModel, Vehicle>()
.ForMember(dest => dest.DealerForeignKey, opt => opt.MapFrom<DealerResolver>())
.ForMember(dest => dest.ModelForeignKey, opt => opt.MapFrom<VehicleModelResolver>()).ReverseMap();
});
提到的解析器(vericlemodelresolver和dealerresolver)只需占用源属性(在这种情况下为Thype Integer),然后返回车辆正确类型的对象。Modelforeignkeyand parter。
private IVehicleRepository _vehicleRepo;
public DealerResolver(IVehicleRepository vehicleRepo_)
{
_vehicleRepo = vehicleRepo_;
}
public Dealer Resolve(VehicleViewModel source, Vehicle destination, Dealer destMember, ResolutionContext context)
{
List<Dealer> dealers = _vehicleRepo.GetDealerById(source.DealerForeignKey).ToList();
return dealers.FirstOrDefault();
}
public class VehicleModelResolver : IValueResolver<VehicleViewModel, Vehicle, VehicleModels>
{
private IVehicleRepository _vehicleRepo;
public VehicleModelResolver(IVehicleRepository vehicleRepo_)
{
_vehicleRepo = vehicleRepo_;
}
public VehicleModels Resolve(VehicleViewModel source, Vehicle destination, VehicleModels destMember, ResolutionContext context)
{
List<VehicleModels> vehModels = _vehicleRepo.GetModelById(source.ModelForeignKey).ToList();
return vehModels.FirstOrDefault();
}
}
运行代码时,我会看到错误消息"无参数为此对象定义的无参数构造函数"。在运行时逐步浏览代码,揭示了对所有属性的映射都很好,直到wareviewModel.modelforeignkey。
。映射车辆ViewModel.modelforeignkey-> warter.modelforeignkey有一些东西,我目前看不到。就像我之前说的那样,我意识到这些属性是不同类型的,但是解析器应该考虑到这一点。有什么想法吗?
更新 - 对此有一个建议 - DI配置不正确。制作了一个快速视频,详细介绍了该问题及其解决方案https://youtu.be/tgu7tjdvsk8
youtu.be/tgu7tjdvsk8
并不是真正的回答,我只是制作了一个视频,以使其非常清楚。 - 我想归功于Lucian Bargaoanu真正的答案。