C# 借助注入服务的AutoMapper地图字典

我需要这样的东西：

    public myMappingProfile(IInjectableService myInjectableService)
    {
        CreateMap<Source, Destination>()
            .ForMember(dest => dest.DestinationDictionary, opt => opt.MapFrom(src =>
            {
                var dict = new Dictionary<myEnum, string>();
                foreach (var item in src.SourceDictionary)
                {
                    dict.Add(item.Key, myInjectableService.BuildUrl(item.Value));
                }
                return dict;
            }));

但Visual Studio抱怨：

无法将属性或索引器分配给--它是只读的

下一次尝试是CustomResolver：

.ForMember(dest => dest.TenantImages, opt => opt.MapFrom<CustomResolver>())

.ForMember（dest=>dest.TenantImages，opt=>opt.MapFrom（））

公共类CustomResolver:IValueResolver>> { 私有只读IInjectableService\u myInjectableService

    public CustomResolver(IInjectableService myInjectableService)
    {
        _myInjectableService = myInjectableService;
    }

    public List<KeyValuePair<MyEnum, string>> Resolve(
        Source source,
        Destination destination,
        List<KeyValuePair<MyEnum, string>> destMember,
        ResolutionContext context)
    {
        destMember = new List<KeyValuePair<MyEnum, string>>();
        foreach (var entry in source.SourceDictionary)
        {
            destMember.Add(new KeyValuePair<myEnum, string>(entry.Key, _myInjectableService.BuildUrl(entry.Value)));
        }
        return destMember;
    }
}

公共CustomResolver（IInjectableService myInjectableService）
{
_myInjectableService=myInjectableService；
}
公开列表解析(
来源,，
目的地，
名单成员：，
决议（上下文）
{
destMember=新列表（）；
foreach（source.SourceDictionary中的var条目）
{
Add（新的KeyValuePair（entry.Key，_myInjectableService.BuildUrl（entry.Value））；
}
返回成员；
}
}

但会引发以下异常：

System.MissingMethodException:未定义无参数构造函数 对于这个对象

我不知道如何将iInputableService放入CustomResolver

有没有办法解决这个问题？ 谢谢。

我认为您必须使用：

看见

    public CustomResolver(IInjectableService myInjectableService)
    {
        _myInjectableService = myInjectableService;
    }

    public List<KeyValuePair<MyEnum, string>> Resolve(
        Source source,
        Destination destination,
        List<KeyValuePair<MyEnum, string>> destMember,
        ResolutionContext context)
    {
        destMember = new List<KeyValuePair<MyEnum, string>>();
        foreach (var entry in source.SourceDictionary)
        {
            destMember.Add(new KeyValuePair<myEnum, string>(entry.Key, _myInjectableService.BuildUrl(entry.Value)));
        }
        return destMember;
    }
}

    // Add this mapping, if the name of the property in source and destination type differ.
    CreateMap<Source, Destination>()
        .ForMember(dest => dest.DestinationDictionary, opt => opt.MapFrom(src => src.SourceDictionary));

    // Add this mapping to create an instance of the dictionary, filled by the values from the source dictionary.
    CreateMap</*type of source dictionary*/, Dictionary<myEnum, string>>()
        .ConvertUsing(src =>
        {
            var dict = new Dictionary<myEnum, string>();
            foreach (var item in src)
            {
                dict.Add(item.Key, myInjectableService.BuildUrl(item.Value));
            }
            return dict;
        }));

src.ToDictionary(item => item.Key, item => myInjectableService.BuildUrl(item.Value));