在 Unity 配置中注册泛型类型

Question

哦！这是一个非常奇怪的问题。我打算注册这两种类型，但是没有什么可以很好地工作。

<unity>
    <typeAliases>
        <typeAlias alias="IEqualityComparer`1"
                   type="System.Collections.Generic.IEqualityComparer`1, mscorlib" />
        <typeAlias alias="singleton"
                   type="Microsoft.Practices.Unity.ContainerControlledLifetimeManager, Microsoft.Practices.Unity" />            
        <typeAlias alias="EqualityComparer`1"
                   type="System.Collections.Generic.EqualityComparer`1, mscorlib" />
    </typeAliases>
    <containers>
        <container>
            <types>
                <register type="IEqualityComparer`1"
                          mapTo="EqualityComparer`1">
                    <lifetime type="singleton" />
                </register>
            </types>
        </container>
    </containers>
</unity>

这是我的控制器：

public class MyController : MyExtendedController {
    private readonly IEqualityComparer<int> _fakeComparer;

    public ResourcesController(IEqualityComparer<int> fakeComparer) {
        _fakeComparer = fakeComparer;
    }
}

Unity 在解析控制器时抛出异常：

Resolution of the dependency failed, type = "MyController", name = "(none)".
Exception occurred while: while resolving.
Exception is: InvalidOperationException - The type EqualityComparer`1 cannot be constructed. You must configure the container to supply this value.
-----------------------------------------------
At the time of the exception, the container was:
Resolving MyController,(none)
Resolving parameter "fakeComparer" of constructor   MyController(System.Collections.Generic.IEqualityComparer`1[[int, mscorelib]] fakeComparer)
Resolving System.Collections.Generic.EqualityComparer`1[int, mscorelib],(none) (mapped from System.Collections.Generic.IEqualityComparer`1[int, mscorelib], (none))

如有任何建议，我们将不胜感激；）

Answer 1

更新答案

原因是 EqualityComparer 是一个抽象类，如您所见 MSDN。 Unity无法实例化抽象类，您必须提供具体的实现。

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第一个答案

您是否配置了服务器：

var container = new UnityContainer();
var section = (UnityConfigurationSection)ConfigurationManager.GetSection("unity");
section.Containers.Default.Configure(container);