WPF从UserControl绑定MainWindow控件，未激发PropertyChanged

public static readonly DependencyProperty MyPropertyProperty = DependencyProperty.Register(
    "MyProperty", typeof(string), typeof(UserControl), new PropertyMetadata(null, OnMyPropertyChanged));

public string MyProperty
{
    get { return (string)GetValue(MyPropertyProperty); }
    set { SetValue(MyPropertyProperty, value); }
}

private static void OnMyPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
    // 在属性更改时执行的逻辑
    // 可以在这里触发PropertyChanged事件
}

<Window x:Class="MainWindow"
        xmlns:local="clr-namespace:YourNamespace"
        xmlns:uc="clr-namespace:YourNamespace.UserControls">
    <Grid>
        <uc:YourUserControl MyProperty="{Binding ElementName=YourMainWindowControl, Path=YourProperty}" />
    </Grid>
</Window>