Automapper自动映射

Question

我有一个领域模型，包含以下属性：

public class Profile
{
    public DateTime birthDate { get; set; }
    public List<Language> languages { get; set; }
}

其中(Language)代表在此处定义的枚举:

public enum Language
{
    English,
    French,
    Spannish
}

我希望根据存储在我的领域模型中的语言值，自动填充以下两个属性：

public Dictionary <int, String> languages_list { get; set; }
public List<string> languages_known { get; set; }

问题是：是否可以使用自动映射完成，如果可以，应该如何进行？

- Fabien Piron

---

你能添加更多细节吗？例如，您希望在每个属性中看到什么内容（例如，在“dictionary”中，“int”代表什么？）。最好包含示例数据的单元测试。 - Mightymuke

整数必须表示枚举中的索引，例如（对于英语，它是1），字符串表示值，在这里它是英语。 - Fabien Piron

Answer 1

好的，根据您提供的细节，我得出了以下结论。

类

public class SOProfile
{
    public DateTime birthDate { get; set; }
    public List<Language> languages { get; set; }
}

public class WhatAmI
{
    public Dictionary<int, String> languages_list { get; set; }
    public List<string> languages_known { get; set; }
}

请注意，Profile已更名为SOProfile，以避免与AutoMapper发生冲突。 AutoMapper配置

public class MyProfile : Profile
{
    public override string ProfileName
    {
        get
        {
            return "MyProfile";
        }
    }

    protected override void Configure()
    {
        Mapper.CreateMap<SOProfile, WhatAmI>()
              .ForMember(dest => dest.languages_list,
                         opt => opt.MapFrom(
                             src => src.languages
                                 .Select((x,i) => new { Item = x, Index = i})
                                 .ToDictionary(x => x.Index,
                                               x => x.Item.ToString())))
              .ForMember(dest => dest.languages_known,
                         opt => opt.MapFrom(
                             src => src.languages
                                 .Select(x => x.ToString()).ToList()));
    }
}

单元测试

[TestFixture]
public class MappingTests
{
    [Test]
    public void AutoMapper_Configuration_IsValid()
    {
        Mapper.Initialize(m => m.AddProfile<MyProfile>());
        Mapper.AssertConfigurationIsValid();
    }

    [Test]
    public void AutoMapper_Mapping_IsValid()
    {
        Mapper.Initialize(m => m.AddProfile<MyProfile>());
        Mapper.AssertConfigurationIsValid();

        var profile = new SOProfile
            {
                birthDate = new DateTime(2012, 01, 01),
                languages = new List<Language>
                    {
                        Language.English,
                        Language.French,
                        Language.English,
                        Language.French
                    }
            };

        var rc = Mapper.Map<SOProfile, WhatAmI>(profile);

        Assert.That(rc, Is.Not.Null);

        Assert.That(rc.languages_known, Is.Not.Null);
        Assert.That(rc.languages_known.Count, Is.EqualTo(4));

        Assert.That(rc.languages_known.Count(x => x == "English"),
                    Is.EqualTo(2));
        Assert.That(rc.languages_known.Count(x => x == "French"),
                    Is.EqualTo(2));
        Assert.That(rc.languages_known.Count(x => x == "Spanish"),
                    Is.EqualTo(0));

        Assert.That(rc.languages_list, Is.Not.Null);
        Assert.That(rc.languages_list.Count, Is.EqualTo(4));

        Assert.That(rc.languages_list.First(x => x.Key == 0).Value,
                    Is.EqualTo("English"));
        Assert.That(rc.languages_list.First(x => x.Key == 1).Value,
                    Is.EqualTo("French"));
        Assert.That(rc.languages_list.First(x => x.Key == 2).Value,
                    Is.EqualTo("English"));
        Assert.That(rc.languages_list.First(x => x.Key == 3).Value,
                    Is.EqualTo("French"));
    }
}

- Mightymuke