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[英]Automapper ValueResolver with dependency resolved via StructureMap
[英]Using dependency injection with AutoMapper ValueResolver that has constructor arguments
我有以下自定義值解析器:
public class ImageUrlResolver<T> : ValueResolver<T, string>
{
private readonly ISettings _settings;
public ImageUrlResolver(string size)
{
_settings = ObjectFactory.GetInstance<ISettings>();
}
...
}
.ForMember(d => d.ImageUrl,
o => o.ResolveUsing<ImageUrlResolver>().ConstructedBy(() => new ImageUrlResolver("150x150"))
我正在嘗試更新它,以便我可以注入 StructureMap 的IContainer
而不是使用ObjectFactory
,但是我不確定當它具有構造函數參數時如何構造解析器。 還有什么我可以做的嗎?
我想出了一個解決辦法。 我現在將IContainer
注入到配置文件中,並將其傳遞給解析器。
public static void Initialise(IContainer container)
{
var type = typeof(Profile);
var profiles = AppDomain.CurrentDomain
.GetAssemblies()
.SelectMany(a => a.GetTypes())
.Where(t => type.IsAssignableFrom(t) && type != t)
.Select(container.GetInstance)
.Cast<Profile>()
.ToList();
Mapper.Initialize(c =>
{
profiles.ForEach(c.AddProfile);
c.ConstructServicesUsing(container.GetInstance);
});
}
public class MyProfile : Profile
{
private readonly IContainer _container;
public MyProfile(IContainer container)
{
_container = container;
}
private static void Configure()
{
Mapper.CreateMap<Entity, Model>()
.ForMember(d => d.ImageUrl, o => o.ResolveUsing<ImageUrlResolver>().ConstructedBy(() => new ImageUrlResolver(_container, "150x150"))
}
}
也許不是最干凈的解決方案,但它是我發現唯一有效的解決方案。
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