我知道如何在一个窗口中处理F1,但这可以全局完成,所以我不必在所有窗口中添加相同的代码吗？

以下是我尝试过的测试,F1在子窗口上不起作用.

Window1.xaml：

<Window x:Class="WpfApplication2.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <Window.CommandBindings>
        <CommandBinding Command="ApplicationCommands.Help"
                        Executed="CommandBinding_Executed"/>
    </Window.CommandBindings>
    <Grid>
        <Button Content="Open a new window"
                Click="Button_Click"/>
    </Grid>
</Window>

Window1.xaml.cs：

using System.Windows;
using System.Windows.Input;

namespace WpfApplication2
{
    partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        void CommandBinding_Executed(object sender,ExecutedRoutedEventArgs e)
        {
            MessageBox.Show("Help");
        }

        void Button_Click(object sender,RoutedEventArgs e)
        {
            new Window().ShowDialog();
        }
    }
}