C# Automapper将2个类配置为一个

我有以下数据库基础结构类：

[Table("ApplicationDriverEquipments")]
public partial class ApplicationDriverEquipment
{
    public int Id { get; set; }
    [StringLength(256)]
    public string Make { get; set; }
    [StringLength(256)]
    public string Model { get; set; }
    [StringLength(256)]
    public string Year { get; set; }
    [StringLength(256)]
    public string VINNumber { get; set; }
    [StringLength(256)]
    public string PlateNumber { get; set; }
    [StringLength(256)]
    public string CurrentMileage { get; set; }
    [StringLength(256)]
    public string Length { get; set; }


    public int TypeId { get; set; }
    public virtual ApplicationDriverEquipmentType Type { get; set; }

    public int DriverId { get; set; }
    public virtual ApplicationDriver Driver { get; set; }
}

[Table("ApplicationDriverEquipmentTypes")]
public partial class ApplicationDriverEquipmentType
{
    public ApplicationDriverEquipmentType()
    {
        Equipments = new HashSet<ApplicationDriverEquipment>();
    }

    public int Id { get; set; }
    [Required]
    [StringLength(256)]
    public string Name { get; set; }
    public virtual ICollection<ApplicationDriverEquipment> Equipments { get; set; }
}

我编写了以下自动映射规则来解决此问题：

        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentTractorDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .ForMember(c => c.Type.Name, p => p.UseValue<string>(Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.Tractor));
        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentTrailerDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .ForMember(c => c.Type.Name, p => p.UseValue<string>(Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.Trailer));
        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentStraightTruckDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .ForMember(c => c.Type.Name, p => p.UseValue<string>(Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.StraightTruck));
        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentCargoVanDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .ForMember(c => c.Type.Name, p => p.UseValue<string>(Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.CargoVan));

我有一个错误：

表达式“c=>c.Type.Name”必须解析为顶级成员，而不是 任何子对象的属性。在子类型上使用自定义解析程序 或者改用AfterMap选项

更新

我重写了地图：

        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentTractorDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .AfterMap((src, dest)=> dest.Type.Name = Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.Tractor);
        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentTrailerDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .AfterMap((src, dest) => dest.Type.Name = Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.Trailer);
        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentStraightTruckDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .AfterMap((src, dest) => dest.Type.Name = Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.StraightTruck);
        CreateMap<Domain.POCO.Application.ApplicationDriverEquipmentCargoVanDomain, Infrastructure.Asset.ApplicationDriverEquipment>()
            .AfterMap((src, dest) => dest.Type.Name = Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.CargoVan);

但现在我犯了一个错误：

类型映射配置：ApplicationDriverEquipmentTractor域-> 应用河流设备 Domain.POCO.Application.ApplicationDriverEquipmentTractorDomain-> Infrastructure.Asset.ApplicationDriver设备

属性：类型-->AutoMapper.AutoMappingException:缺少 键入映射配置或不支持的映射

映射类型：

字符串->应用程序驱动设备类型

System.String->Infrastructure.Asset.ApplicationDriverEquipmentType

似乎，我不明白如何正确映射它

请尝试使用MapFrom方法：

.ForMember(c => c.Type.Name, p => p.MapFrom(s => Domain.StaticStrings.ApplicationDriverEquipmentTypeStaticStringsDomain.Tractor));

您正在尝试从中映射 ApplicationDriverEquipmentTractorDomain。类型是字符串 到 ApplicationDriver设备。类型是ApplicationDriver设备类型

您的映射配置在哪里

甚至可以将字符串映射到ApplicationDriverEquipmentType吗？ 当然，你可以有一个字符串名，但是你从哪里得到Id和设备呢

我怀疑您不希望每次映射时都创建该类型的新实例，而是需要从某种字典中查找实例，类似于

要实现这个想法，您只需要

从数据库加载所有ApplicationDriverEquipmentType 假设名称是唯一的，将它们放入字典中 注册一个或多个文件如下 实现这一点的一种方法是使用 你可以用像这样的东西 void convertingusingfunc映射函数； 并放入您自己的函数，该函数将按名称解析ApplicationDriverEquipmentType，假设名称是唯一的，如下所示：

var applicationEquipments = new ApplicationDriverEquipmentTypeRepository().FindAll(); // get all the values somehow from db
var dictionary = applicationEquipments.ToDictionary(x=>x.Name);
Func<string, ApplicationDriverEquipmentType> resolver = x=>dictionary[x]; 

另一种方法是使用

---

本质上，这个想法是相同的-预加载对象的映射，只是插入它的方式不同

类型是类中的字符串，它有名称属性吗？@ironstone13，类型是ApplicationDriverEquipmentAbstractDomain类的字符串，但有ApplicationDriverEquipmentType是ApplicationDriverEquipmentHey，@Oleh-Sh，很抱歉我的回答冗长重复，但我终于写下了，请看下面我的回答。如果你有任何问题，请告诉我know@OlegSh为什么要在映射逻辑中设置这样的类型c=>c.Type.Name。就我所见，它是一个简单的字符串属性，所以它必须是c=>c。Type@raimondBurgaj，如您所见，类型的类型为ApplicationDriverEquipmentType，而不是目标类中的字符串：

var applicationEquipments = new ApplicationDriverEquipmentTypeRepository().FindAll(); // get all the values somehow from db
var dictionary = applicationEquipments.ToDictionary(x=>x.Name);
Func<string, ApplicationDriverEquipmentType> resolver = x=>dictionary[x];