WPF上下文菜单不会绑定到VIewModel属性

public class MainViewModel : INotifyPropertyChanged
{
    public ObservableCollection<MenuItemModel> ContextMenuItems { get; set; }

    public MainViewModel()
    {
        // 初始化上下文菜单项
        ContextMenuItems = new ObservableCollection<MenuItemModel>
        {
            new MenuItemModel { Title = "菜单项1", Command = new RelayCommand(ExecuteCommand1) },
            new MenuItemModel { Title = "菜单项2", Command = new RelayCommand(ExecuteCommand2) },
            // 添加更多菜单项...
        };
    }

    private void ExecuteCommand1()
    {
        // 处理菜单项1的点击事件
    }

    private void ExecuteCommand2()
    {
        // 处理菜单项2的点击事件
    }

    // 实现INotifyPropertyChanged接口...
}

<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">
    <Window.DataContext>
        <local:MainViewModel />
    </Window.DataContext>
    <Grid>
        <Grid.ContextMenu>
            <ContextMenu ItemsSource="{Binding ContextMenuItems}">
                <ContextMenu.ItemContainerStyle>
                    <Style TargetType="MenuItem">
                        <Setter Property="Header" Value="{Binding Title}" />
                        <Setter Property="Command" Value="{Binding Command}" />
                    </Style>
                </ContextMenu.ItemContainerStyle>
            </ContextMenu>
        </Grid.ContextMenu>
        <!-- 其他界面元素... -->
    </Grid>
</Window>