1

源类：

public class ApplicationDriverFormVM
{
    public ApplicationDriverAddressFormVM PresentAddress { get; set; }
    public List<ApplicationDriverAddressFormVM> PreviousAddresses { get; set; }
}

public class ApplicationDriverAddressFormVM
{
    [Required]
    [StringLength(256)]
    [Display(Name = "Address")]
    public string Address { get; set; }
    [Required]
    [StringLength(256)]
    [Display(Name = "City")]
    public string City { get; set; }
    //.....
}

目的地等级：

public class ApplicationDriverDomain
{
    public List<ApplicationDriverAddressDomain> Addresses { get; set; }
}

public class ApplicationDriverAddressDomain
{
    public int Id { get; set; }
    public string Address { get; set; }
    public string City { get; set; }
    //....
    public bool IsPresentAddress { get; set; }
}

所以，我想将 PresentAddress（一个对象）和 PreviousAddresses（集合）映射到 Addresses 属性（集合），其中每个元素都有 IsPresentAddress 属性，如果它被映射 PresentAddress 应该为 true，而对于 PreviousAddresses 映射元素则为 false。我尝试编写这样的地图基本规则：

        CreateMap<ViewModels.ApplicationDriverFormVM, ApplicationDriverDomain>();
        CreateMap<ViewModels.ApplicationDriverAddressFormVM, ApplicationDriverAddressDomain>();

当然，它不能正常工作。怎么办？

4

1 回答 1

2

这可以通过ForMember扩展方法来完成。

这是一种快速而肮脏的方式来获得你想要的东西。它创建了一个新的组合列表ApplicationDriverAddressFormVMto map from，但是如果您浏览文档，您可能会发现一些更优雅的东西。

Mapper.CreateMap<ApplicationDriverFormVM, ApplicationDriverDomain>()
    .ForMember(dest => dest.Addresses, opt => opt.MapFrom(src => src.PreviousAddresses.Union(new List<ApplicationDriverAddressFormVM>() { src.PresentAddress })));

Mapper.CreateMap<ApplicationDriverAddressFormVM, ApplicationDriverAddressDomain>();

经过进一步调查，我发现了以下方法。它使用该ResolveUsing选项。同样，这很粗糙，并且只使用了我发现的第一个功能。您应该进一步探索IMemberConfigurationExpression界面，看看您还有哪些其他选项

        Mapper.CreateMap<ApplicationDriverFormVM, ApplicationDriverDomain>()
            .ForMember(dest => dest.Addresses, opt => opt.ResolveUsing(GetAddresses));

...

    static object GetAddresses(ApplicationDriverFormVM src)
    {
        var result = Mapper.Map<List<ApplicationDriverAddressDomain>>(src.PreviousAddresses);
        foreach(var item in result)
        {
            item.IsPresentAddress = false;
        }
        var present = Mapper.Map<ApplicationDriverAddressDomain>(src.PresentAddress);
        present.IsPresentAddress = true;
        result.Add(present);

        return result;
    }
于 2017-09-27T18:40:23.933 回答