Do mouse clicks bring keyboard focus to focusable controls by default?

问题

This question can seem quite odd but from all my experience I've gotten used to setting keyboard focus to the focusable element just by clicking it with the mouse; however, UserControl with the properties Focusable = true and IsTabStop = true came as a surprise to me because it gets keyboard focus via Tab but stays ignorant to mouse clicks.

回答1:

Handle the click event on the UserControl and add this code to the eventhandler:

private void UserControl_OnMouseUp(object sender, MouseButtonEventArgs e)
{
   Keyboard.Focus(sender as UserControl);
}

来源：https://stackoverflow.com/questions/15600017/do-mouse-clicks-bring-keyboard-focus-to-focusable-controls-by-default