一个类实现两个不同的IObservables？ [英] A class implementing two different IObservables?

问题描述

我有两个事件类，称他们为 StatusChanged 和的ValueChanged 。我想了解一下这些公开流为的IObservable 。正在实施的IObservable<状态> 和的IObservable<价值> 在同一类坏？它是容易造成我（或类的用户）的悲伤？

I have a class with two events, call them StatusChanged and ValueChanged. I'm wondering about exposing these 'streams' as IObservable. Is implementing IObservable<Status> and IObservable<Value> on the same class 'bad'? Is it likely to cause me (or users of my class) grief?

推荐答案

实现对不同类型的协变界面是一个真正的馊主意。试想，如果你投的类的IObservable<发生了什么;对象> ，也就是现在的暧昧

Implementing a covariant interface for different types is a really bad idea. Consider what happens if you cast the class to IObservable<object>, which is now ambiguous.

我想而有两个属性的IObservable<状态> StatusObservable {获得{...}} 和的IObservable< VALUE> ValueObservable {获得{...}} 。简单，干净，它反映你的类提供了两个事件。

I'd rather have two properties IObservable<Status> StatusObservable{get{...}} and IObservable<Value> ValueObservable{get{...}}. Simple, clean and it mirrors the two events your class offers.

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