如何在ContextMenu中为MenuItem设置CommandTarget？

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

   <MenuItem Header="MenuItem1" Command="{Binding MenuItemCommand}" CommandTarget="{Binding ElementName=MyControl}"/>
</ContextMenu><TextBox x:Name="MyControl" ContextMenuOpening="MyControl_ContextMenuOpening"/>

public ICommand MenuItemCommand { get; set; }

public MyViewModel()
{
    MenuItemCommand = new RelayCommand<object>(MenuItemCommandExecute);
}

private void MenuItemCommandExecute(object parameter)
{
    var control = parameter as Control;
    if (control != null)
    {
        // 在这里执行你的逻辑
    }
}

private void MyControl_ContextMenuOpening(object sender, ContextMenuEventArgs e)
{
    // 在这里设置CommandTarget的值
    var menuItem = (MenuItem)MyControl.ContextMenu.Items[0];
    menuItem.CommandTarget = MyControl;
}