问题
I have a WPF Window which I only create one time and then Show() and Hide() several times. Now I am searching a way to set the focus on a element on each Show(). Where and how can I do this?
回答1:
In WPF there are two main concepts that pertain to focus: keyboard focus and logical focus. Keyboard focus refers to the element that receives keyboard input and logical focus refers to the element in a focus scope that has focus. These concepts are discussed in detail in this overview.
You can probably write you own ShowHide method by including both Window.Show/Hide and element.Focus functionalities in order to handle both in the same method.
回答2:
Just call Element.Focus() on the element you want to focus.
If you mean bring focus to the window try calling window.Activate()
来源：https://stackoverflow.com/questions/6395645/wpf-window-set-focus