Question

IUnityContainer unityContainer = new UnityContainer();

unityContainer.RegisterType<IMembershipService, MembershipService>();
unityContainer.RegisterInstance<IMappingEngine>(Mapper.Engine);
ControllerBuilder.Current.SetControllerFactory(new UnityControllerFactory(unityContainer));

我如何获得统一容器？ ControllerBuilder.Current.GetControllerFactory() - 不是。首先我得到统一容器，从统一容器我希望使用Resolve获得服务。有人可以帮忙吗？

Answer 1

添加静态方法（请参阅GetConfiguredContainer）：

public class UnityConfig
{
    private static Lazy<IUnityContainer> container = new Lazy<IUnityContainer>(() =>
    {
        var container = new UnityContainer();
        RegisterTypes(container);
        return container;
    });

    /// <summary>
    /// Gets the configured Unity container.
    /// </summary>
    /// <returns>The generated unity container</returns>
    public static IUnityContainer GetConfiguredContainer()
    {
        return container.Value;
    }

    /// <summary>Registers the type mappings with the Unity container.</summary>
    /// <param name="container">The unity container to configure.</param>
    /// <remarks>There is no need to register concrete types such as controllers or API controllers (unless you want to
    /// change the defaults), as Unity allows resolving a concrete type even if it was not previously registered.</remarks>
    public static void RegisterTypes(IUnityContainer container)
    {
        // NOTE: To load from web.config uncomment the line below. Make sure to add a Microsoft.Practices.Unity.Configuration to the using statements.
        // container.LoadConfiguration();

        // Example
        container.RegisterType<IFileSystem, FileSystem>();
    }
}


var unity = new UnityConfig();
IUnityContainer unityContainer = UnityConfig.GetConfiguredContainer();

然后你可以使用：

TypeThatYouWant instance = unityContainer.Resolve<TypeThatYouWant>();

如果您无法访问UnityConfig，因为您的项目依赖项处于尴尬状态，只需在项目中为您的容器添加另一个带有静态属性的UnityConfig静态类，您需要访问它，填充它然后该项目也可以参考：

// Some other project
public static class UnityConfig
{
    public static IUnityContainer Container { get; set; }
}

var unity = new UnityConfig();
IUnityContainer unityContainer = UnityConfig.GetConfiguredContainer();

project.namespace.UnityConfig.Container = unityContainer;

除此之外，尝试设计一种可以充分利用类构造注入的设计模式。

Answer 2

你为什么这样做？它是依赖注入反模式。只需让控制器工厂通过控制器构造函数或属性注入依赖项。

我如何从统一容器中获取服务对象？

2 个答案: