統一2控制檯應用程序中的IDisposable問題C＃

Question

我在控制檯應用程序中使用Unity 2.1.505.0，它由IDisposable實現CarRepository組成。然而，Dispose()不在其範圍之外。以下是代碼示例：

internal class Program 
    { 
     private static void Main(string[] args) 
     {   
      CarShop.Entry(); 
     } 
    } 

    class CarShop 
    { 
     static UnityContainer unityContainer = new UnityContainer(); 

     public static void Entry() 
     {   
      unityContainer.RegisterType<ICarRepository, CarRepository>(); 
      var carShop = new CarShop(); 
      carShop.BuyCar(); 
     } 

     public void BuyCar() 
     { 
      CheckCar(); 
     } 

     private void CheckCar() 
     { 
      var carService = unityContainer.Resolve<CarService>(); 
      var car = carService.GetCar(1); 
     // **Dispose() method is not called out of this scope** 
     } 
    } 

    class CarService 
    { 
     private ICarRepository carRepository; 
     public CarService(ICarRepository carRepository) 
     { 
      this.carRepository = carRepository; 
     } 

     public Car GetCar(int id) 
     { 
      return this.carRepository.GetCar(id); 
     } 
    } 

    interface ICarRepository 
    { 
     Car GetCar(int id); 
    } 

    class CarRepository : ICarRepository, IDisposable 
    { 
     public Car GetCar(int id) 
     { 
      return null; 
     } 

     public void Dispose() 
     { 

     } 
    } 

    public class Car 
    { 
    } 

任何想法？

更新

由於@nemesv提出以下解決方案：

unityContainer.RegisterType<ICarRepository, CarRepository>(
     new HierarchicalLifetimeManager()) 

using (var childContainer = unityContainer.CreateChildContainer()) 
    { 
     var carService = childContainer.Resolve<CarService>(); 
     var car = carService.GetCar(1);    
    } 

它的工作原理。但與Unity.MVC不同，它需要明確創建childContainer。是否有透明的方式處理IDispose對象，如Unity.MVC。或未來的其他工具。

Answer 1

默認情況下，RegisterType方法使用TransientLifetimeManager，它不存儲對已創建對象的引用，因此它不會爲您調用Dispose。

在構建的LifetimeManager實現中，只有ContainerControlledLifetimeManager在處理容器本身時處置託管對象。

您可以閱讀有關終身經理的位置：Understanding Lifetime Managers

如果你的目標是使用後處置CarRepository，那麼你可以使用HierarchicalLifetimeManager和child containers實現它：

public static void Entry() 
{   
    unityContainer.RegisterType<ICarRepository, CarRepository>(
     new HierarchicalLifetimeManager()); 
    var carShop = new CarShop(); 
    carShop.BuyCar(); 
} 

private void CheckCar() 
{ 
    using (var childContainer = unityContainer.CreateChildContainer()) 
    { 
     var carService = childContainer.Resolve<CarService>(); 
     var car = carService.GetCar(1);    
    } 
    // **Dispose() method is not called out of this scope** 
}