移动命令栏按钮单击事件从帧输出到MainPage UWP

<Page
    x:Class="YourAppName.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:YourAppName"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
        <CommandBar>
            <CommandBar.PrimaryCommands>
                <AppBarButton Icon="Accept" Label="按钮" Click="Button_Click"/>
            </CommandBar.PrimaryCommands>
        </CommandBar>
    </Grid>
</Page>

using Windows.UI.Xaml.Controls;

namespace YourAppName
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private void Button_Click(object sender, Windows.UI.Xaml.RoutedEventArgs e)
        {
            // 处理按钮点击事件的逻辑代码
            // 例如，输出一条消息到帧(Frame)
            Frame frame = Window.Current.Content as Frame;
            frame.Content = "按钮被点击了！";
        }
    }
}