我试图按照简单注入器网站上的How To部分中的建议按键解析实例。为什么Simple Injector不会处理由Func解决的实例?
我使用基于字典的工厂。该字典将包含对DI容器的引用。当创建实例时,将会询问DI容器。在原始代码中,工厂是使用new()运算符创建的。我改变了这个让DI容器自动处理工厂。 (现在请让我,如果存在另一种方式来实现这一目标。)
var diContainer = new Container();
//diContainer.RegisterSingleton<IBasicFactory>(new BasicFactory
//{
// { "A",() => diContainer.GetInstance<A>() },
// { "B",() => diContainer.GetInstance<B>() },
//});
diContainer.RegisterSingleton<IBasicFactory, BasicFactory>();
var instance = (BasicFactory) diContainer.GetInstance<IBasicFactory>();
instance.Add("A",() => diContainer.GetInstance<A>());
instance.Add("B",() => diContainer.GetInstance<B>());
diContainer.Verify();
var factory = diContainer.GetInstance<IBasicFactory>();
factory.CreateInstance("A").SayHello();
factory.CreateInstance("B").SayHello();
diContainer.Dispose();
的情况下创建工作得很好,但那些由工厂(A和B)返回的非将布置在DI contanier是处置。
我在做什么错了?
这里遵循的其他代码:
using System;
using System.Collections.Generic;
public interface IBasic
{
void SayHello();
}
public abstract class Basic : IBasic, IDisposable
{
protected Basic()
{
System.Console.WriteLine("Creating instance of Basic");
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if(disposing)
System.Console.WriteLine("Disposing instance of Basic");
}
public abstract void SayHello();
}
public interface IBasicFactory
{
IBasic CreateInstance(string key);
}
public class BasicFactory : Dictionary<string, Func<IBasic>>, IBasicFactory, IDisposable
{
public BasicFactory()
{
System.Console.WriteLine("Creating instance of BasicFactory");
}
public IBasic CreateInstance(string key)
{
Func<IBasic> createObject;
if (this.TryGetValue(key, out createObject))
return createObject();
var msg = $"The parameter ${key} is not supported by this factory";
System.Console.WriteLine(msg);
throw new NotSupportedException(msg);
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
System.Console.WriteLine("Disposing instance of BasicFactory");
this.Clear();
}
}
}
public class A : Basic
{
public override void SayHello()
{
System.Console.WriteLine("Hello A!");
}
}
public class B : Basic
{
public override void SayHello()
{
System.Console.WriteLine("Hello B!");
}
}
[*“简单注射器不会隐式跟踪和处置以暂时生活方式注册的组件[*](http://simpleinjector.readthedocs.io/en/latest/disposabletransientcomponent.html) – qujck