原文:

原文地址：

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Bialgous回答：

IInputElement focusedElement = FocusManager.GetFocusedElement(thisWindow);

有两点需要注意：

1. 逻辑焦点 != 键盘焦点

    比如当你点开一个菜单时，菜单具有物理焦点

2. 要想检查得到的这个元素是否有键盘焦点，需检查 IsKeyboardFocused 属性，如果它 == true，则这个元素有键盘焦点

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注：逻辑焦点、物理焦点的概念是什么？不很清楚，请大家赐教:)  ....

以下是原文：

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Hi, you can always determine which element has

logical

focus in your application through the

FocusManager.GetFocusedElement method -- pass it the window in question and it will return which element has

logical

focus in that window.  Remember that

logical

focus != keyboard

focus at all times -- toolbars and menus track their own

focus so if you are currently interacting with a menu then the menu has physical

focus.  But in general, the following code will tell you which element

WPF thinks has

focus in the window:

IInputElement focusedElement = FocusManager.GetFocusedElement(thisWindow);

To determine whether this element has keyboard focus, we can check the IsKeyboardFocused property - if it's set to true, then that element currently has the keyboard focus (as well as being the logical focus for that focus scope).