WPF扩展器-标题中的按钮

using System.Windows;
using System.Windows.Controls;
using System.Windows.Interactivity;

public class TitleBarButtonExtension
{
    public static readonly DependencyProperty ButtonContentProperty =
        DependencyProperty.RegisterAttached("ButtonContent", typeof(object), typeof(TitleBarButtonExtension), new PropertyMetadata(null, OnButtonContentChanged));

    public static object GetButtonContent(DependencyObject obj)
    {
        return (object)obj.GetValue(ButtonContentProperty);
    }

    public static void SetButtonContent(DependencyObject obj, object value)
    {
        obj.SetValue(ButtonContentProperty, value);
    }

    private static void OnButtonContentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        if (d is Window window)
        {
            var button = new Button { Content = e.NewValue };
            button.Click += (sender, args) =>
            {
                // 处理按钮点击事件
                MessageBox.Show("自定义按钮被点击了！");
            };

            // 将按钮添加到标题栏
            var titleBar = Application.Current.MainWindow.Template.FindName("PART_TitleBar", window) as Grid;
            if (titleBar != null)
            {
                titleBar.Children.Add(button);
            }
        }
    }
}

<Window x:Class="YourNamespace.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:YourNamespace"
        Title="MainWindow" Height="450" Width="800"
        local:TitleBarButtonExtension.ButtonContent="设置">
    <!-- 窗口内容 -->
</Window>

<Style TargetType="Window">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="Window">
                <Grid>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <Grid Name="PART_TitleBar">
                        <!-- 标题栏内容 -->
                    </Grid>
                    <ContentPresenter Grid.Row="1"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>