AutoMapper表达式映射与ValueObject
创始人
2024-09-23 11:31:09
0

AutoMapper是一个用于对象映射和类型转换的.NET库。在使用AutoMapper进行实体映射时,我们可能需要将ValueObject映射为目标类型中的一些属性。

以下示例展示了如何在使用AutoMapper时将ValueObject映射为目标类型属性:

public class OrderDto
{
    public int Id { get; set; }
    public AddressDto ShippingAddress { get; set; }
}

public class AddressDto
{
    public string Street { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string ZipCode { get; set; }
}

public class Order
{
    public int Id { get; set; }
    public Address ShippingAddress { get; set; }
}

public class Address
{
    public string Street { get; set; }
    public string City { get; set; }
    public string State { get; set; }
    public string ZipCode { get; set; }
}

public class AddressConverter : IValueConverter
{
    public AddressDto Convert(Address sourceMember, ResolutionContext context)
    {
        if (sourceMember == null) return null;

        return new AddressDto
        {
            Street = sourceMember.Street,
            City = sourceMember.City,
            State = sourceMember.State,
            ZipCode = sourceMember.ZipCode
        };
    }
}

public class MappingProfile : Profile
{
    public MappingProfile()
    {
        CreateMap()
            .ForMember(dest => dest.ShippingAddress, opt => opt.MapFrom(src => src.ShippingAddress));
        CreateMap().ConvertUsing();
    }
}

// 在应用程序启动时注册MappingProfile
var mapperConfig = new MapperConfiguration(cfg =>
{
    cfg.AddProfile();
});
IMapper mapper = new Mapper(mapperConfig);

// 使用AutoMapper实现实体映射
var order = new Order
{
    Id = 1,
    ShippingAddress = new Address
    {
        Street = "123 Main St",
        City = "Anytown",
        State = "MA",
        ZipCode = "12345"
    }
};

var orderDto = mapper.Map(order);

// 输出映射结果
Console.WriteLine(orderDto.Id);
Console.WriteLine(orderDto.ShippingAddress.Street);
Console.WriteLine(orderDto.ShippingAddress.City);
Console.WriteLine(orderDto.ShippingAddress.State);
Console.WriteLine(orderDto.ShippingAddress.ZipCode);

在上面的示例中,创建了一个名为MappingProfile的类,其中定义了如何将Address

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