VB.NET:带有接口的空引用 [英] VB.NET: Null reference with an Interface

问题描述

我有一个空引用警告.伪代码如下:

I have a null reference warning. Dummy code as follows:

 Dim poo As IEnumPooTypes
 Toilet.GetPooInBowl(poo)

变量 'Poo' 表示它可能导致对象引用未设置错误，但我不能在实例中使用 'New' 关键字.如何让警告消失?

The variable 'Poo' says it may result in an object reference not set error but I cannot use the 'New' keyword with an instance. How do I make the warning go away?

推荐答案

如果 IEnumPooTypes 是一个接口，你就不能实例化一个接口.I 暗示它是一个接口.你需要一个 IEnumPooTypes 的具体实现.

You can't instantiate an interface if IEnumPooTypes is an interface. The I is implying that it is an interface. You need a concrete implementation of IEnumPooTypes.

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