确定一个类型是静态的 [英] Determine if a type is static

问题描述

让我们说我有一个键入名为键入。

Let's say I have a Type called type.

我希望确定（没有实际这样对每一种类型），如果我可以用我喜欢的类型做到这一点：

I want to determine if I can do this with my type (without actually doing this to each type):

如果键入是 System.Windows.Point 然后我可以做到这一点：

If type is System.Windows.Point then I could do this:

Point point1 = new Point();

但是，如果键入是统环境那么这不会飞：

Environment environment1 = new Environment(); //wrong

所以，如果我通过每一个可见的类型在装配迭代我怎么跳过所有，将无法创建像第二个实例的类型？我要反思的一种新的，所以我没有很大的术语呢。但愿我想要做的，是pretty的清晰。

So if I am iterating through every visible type in an assembly how do I skip all the types that will fail to create an instance like the second one? I'm kind of new to reflection so I'm not that great with the terminology yet. Hopefully what I'm trying to do here is pretty clear.

推荐答案

静态类中声明摘要和密封在IL水平。所以，你可以检查 IsAbstract 属性来处理这两个摘要类和静态类一气呵成（对于你的使用情况）。

static classes are declared abstract and sealed at the IL level. So, you can check IsAbstract property to handle both abstract classes and static classes in one go (for your use case).

不过，摘要类不是唯一的类型，你不能直接实例化。您应该检查之类的接口（没有伴生类属性）和类型没有通过调用code访问的构造函数。

However, abstract classes are not the only types you can't instantiate directly. You should check for things like interfaces (without the CoClass attribute) and types that don't have a constructor accessible by the calling code.

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