Question

我有例如以下代码查询DTO列表，并将其映射到视图模型列表。我想让我的容器解析这些视图模型，而不是AutoMapper简单地实例化它们而不进行任何注入。

using (var db = new AppDbContext())
{
    var types = await db.ApptTypes
        .Where(t => t.BranchId == branchId && (includeDeleted || !t.IsDeleted))
        .Include(e => e.CreatedBy)
        .Include(e => e.CreatedAt)
        .Include(e => e.Org)
        .Include(e => e.Branch)
        .ToListAsync(cancellationToken);
    return Mapper.Map<IEnumerable<ApptTypeDetailViewModel>>(types);
}

Answer 1

感谢this answer，我找到了一种实现我想要的简洁可靠的方法。主要流程如下：

class Program
{
    private static IUnityContainer _container;
    static void Main(string[] args)
    {
        var boot = new Bootstrapper();
        boot.Run();
        _container = boot.Container;

        InitMaps(_container);

        var dto = new Dto {Id = 418, Name = "Abrahadabra"};
        var model = Mapper.Map<ViewModel>(dto);
    }

    private static void InitMaps(IUnityContainer container)
    {
        Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<Dto, ViewModel>()
                .ConstructUsing(f => UnityObjectFactoty.GetInstance<ViewModel>(container));
        });
    }
}

工厂：

class UnityObjectFactoty
{
    public static TObject GetInstance<TObject>(IUnityContainer container)
    {
        return container.Resolve<TObject>();          
    }
}

viewmodel的位置是：

public class ViewModel
{
    public ViewModel(IService service)
    {
        _service = service;
    }

    private IService _service;
    public int Id { get; set; }
    public string Name { get; set; }
}

剩下的就是提供容器未解析的ctor参数，但这不是我在这种模式的用例中的要求。

如何使Unity解析AutoMapper在映射时创建的模型？

1 个答案: