让所有类型从基类派生的组件

问题描述

我试图检查程序集的内容，发现它的所有类是直接或间接地从Windows.Forms.UserControl的。

I am trying to examine the contents of an assembly and find all classes in it that are directly or indirectly derived from Windows.Forms.UserControl.

我做的这样的：

Assembly dll = Assembly.LoadFrom(filename);
var types = dll.GetTypes().Where(x => x.BaseType == typeof(UserControl));

但它是给一个空列表，因为没有类直接扩展用户控件。我不知道有足够的了解反映迅速做到这一点，如果我没有我宁愿不写一个递归函数。

But it is giving an empty list because none of the classes directly extend UserControl. I don't know enough about reflection to do it quickly, and I'd rather not write a recursive function if I don't have to.

推荐答案

您应该使用这个代替：

You should use Type.IsSubclassOf this instead:

var types = dll.GetTypes().Where(x => x.IsSubclassOf(typeof(UserControl)));

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