使用Unity创建我的课程中使用的单例 [英] Using Unity to create a singleton that is used in my Class

问题描述

我有一个需要HttpClient类实例的类，我只想实例化一次，即Singleton

I have a class that needs an instance of a HttpClient class, which I want to be instantiated only once i.e. Singleton

public interface IMyClass {}
public class MyClass : IMyClass {
    private HttpClient client;
    public MyClass(HttpClient client)
    {
        this.client = client;
    }
}


IUnityContainer container = new UnityContainer();
container.RegisterType<IMyClass, MyClass>();

var httpClient = new HttpClient();

如何将httpClient实例作为单例注册到我的 MyClass 可以使用它吗？

How can I register the httpClient instance as a singleton to my MyClass can use it?

推荐答案

您尝试过吗？

container.RegisterType<IMyClass, MyClass>(new ContainerControlledLifetimeManager());

https://msdn.microsoft.com/zh-CN/library/ff647854.aspx

自

更新：

为了解决HttpClient依赖关系本身，请使用

In order to resolve HttpClient dependency itself, use

container.RegisterType<HttpClient, HttpClient>(new ContainerControlledLifetimeManager(), new InjectionConstructor());

这样，任何需要HttpClient的类都将收到它的相同实例。我不确定参数的顺序，但是基本上您必须告诉Unity 2事情-将HttpClient注册为单例并使用其默认构造函数。

That way any class that needs HttpClient will receive the same instance of it. I'm not sure about the order of parameters, but basically you have to tell Unity 2 things - to register HttpClient as a singleton and to use its default constructor.

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