TinyIoC將模型注入類構造函數

Question

我在xamarin項目中使用TinyIoc，如有必要，我可以更改IoC容器。 我該如何解決這種情況？

internal class Program
{
    private static void Main(string[] args)
    {
        TinyIoC.TinyIoCContainer.Current.Register<IService, Service>();
        TinyIoC.TinyIoCContainer.Current.Register<ViewModel>();
        Model model; //From database... How I can inject this to my viewmodel?
        var viewModel = TinyIoC.TinyIoCContainer.Current.Resolve<ViewModel>();
    }
}

public class Model
{
    public object Data { get; set; }
}

internal interface IService
{
    string SomeMethod(Model model);
}

public class Service : IService
{
    public string SomeMethod(Model model)
    {
        //...
        return string.Empty;
    }
}

internal class ViewModel
{
    private readonly Model model;
    private readonly IService service;

    public string Name { get; private set; }

    public ViewModel(IService service, Model model)
    {
        this.model = model;
        this.service = service;
        this.Name = this.service.SomeMethod(this.model);
    }
}

我想到的唯一一件事是：

internal class Program
{
    private static void Main(string[] args)
    {
        TinyIoC.TinyIoCContainer.Current.Register<IService, Service>();
        TinyIoC.TinyIoCContainer.Current.Register<ViewModel>();
        Model model; //From database... How I can inject this to my viewmodel?
        var viewModel = TinyIoC.TinyIoCContainer.Current.Resolve<ViewModel>();
        viewModel.Initialize(model);
    }
}

internal class ViewModel
{
    private Model model;
    private readonly IService service;

    public string Name { get; private set; }

    public ViewModel(IService service)
    {
        this.service = service;
    }

    public void Initialize(Model model)
    {
        this.model = model;
        this.Name = this.service.SomeMethod(this.model);
    }
}

但是我真的不是這樣：-(我的設計不好？應該使用可靠注射代替構造劑注射嗎？或者可以使用其他禁忌葯嗎？

Answer 1

看看Func的重載方法，看看哪種方法最適合，因為我不知道TinyIoC如何處理實際的實現注冊。 這樣的事情可能會起作用：

.Register<ViewModel>(() => new ViewModel(
    TinyIoC.TinyIoCContainer.Current.Resolve<IService>(), 
    model));

或只是傳遞服務的新實例：

.Register<ViewModel>(() => new ViewModel(new Service(), model));

如果TinyIoC不符合要求，則可以查看XLabs.IoC，了解與Xamarin兼容的替代方案： http ://www.nuget.org/packages?q=xlabs.ioc