使用 StructureMap 是否可以制作单例对象并提供构造函数参数? [英] With StructureMap is it possible to make a Singleton object AND provide constructor arguments?

问题描述

我似乎无法弄清楚如何将对象定义为单例并为构造函数定义两个参数.

I can't seem to figure out how to define a object as a singleton AND define two arguments for the constructor.

我可以做/或 .. 只是不能同时做.

I can do either / or .. just not at the same time.

例如.(这不起作用)...

Eg. (this doesn't work)...

ForRequestedType<IFoo>()
    .TheDefaultIsConcreteType<Foo>()
    .CacheBy(InstanceScope.Singleton)
    .WithCtorArg("alpha").EqualToAppSetting("Alpha")
    .WithCtorArg("beta").EqualToAppSetting("Beta");

建议?

推荐答案

你们很亲近.诀窍是您需要使用备用的默认 DSL 语言 TheDefault.Is.OfConcreteType

You are very close. The trick is that you need to use the alternate default DSL language TheDefault.Is.OfConcreteType

ForRequestedType<IFoo>()
    .CacheBy(InstanceScope.Singleton)
    .TheDefault.Is.OfConcreteType<Foo>()
    .WithCtorArg("alpha").EqualToAppSetting("alpha")
    .WithCtorArg("beta").EqualToAppSetting("beta");

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