列表框项的样式模板，导致事件触发器在删除项后触发

编辑：我发现问题在于ListBoxItem在资源中的风格。如果我评论它，它工作正常。但是它有什么问题呢？我想用蓝色选择等覆盖默认的ListBoxItem样式。

我有一个包含Border的项目模板的ListBox。边框具有触发器，使删除按钮仅在鼠标悬停时显示。现在DeleteCommand命令中发生的情况是我删除此特定项出现在列表框中的数据。因此，边框消失，但仍调用MouseLeave触发器，我得到以下异常：

Exception type: System.InvalidOperationException
Exception message: 'controlBox' name cannot be found in the name scope of 'System.Windows.Controls.Border'.
Exception stack trace: 
   at System.Windows.Media.Animation.Storyboard.ResolveTargetName(String targetName, INameScope nameScope, DependencyObject element)
   at System.Windows.Media.Animation.Storyboard.ClockTreeWalkRecursive(Clock currentClock, DependencyObject containingObject, INameScope nameScope, DependencyObject parentObject, String parentObjectName, PropertyPath parentPropertyPath, HandoffBehavior handoffBehavior, HybridDictionary clockMappings, Int64 layer)
   at System.Windows.Media.Animation.Storyboard.ClockTreeWalkRecursive(Clock currentClock, DependencyObject containingObject, INameScope nameScope, DependencyObject parentObject, String parentObjectName, PropertyPath parentPropertyPath, HandoffBehavior handoffBehavior, HybridDictionary clockMappings, Int64 layer)
   at System.Windows.Media.Animation.Storyboard.BeginCommon(DependencyObject containingObject, INameScope nameScope, HandoffBehavior handoffBehavior, Boolean isControllable, Int64 layer)
   at System.Windows.Media.Animation.BeginStoryboard.Begin(DependencyObject targetObject, INameScope nameScope, Int64 layer)
   at System.Windows.EventTrigger.EventTriggerSourceListener.Handler(Object sender, RoutedEventArgs e)
...

下面是一个示例 XAML：

<Window x:Class="WpfApplication2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication2"
        Title="MainWindow" Height="350" Width="525"
        DataContext="{Binding RelativeSource={RelativeSource Self}}">
    <Window.Resources>
        <local:MyItems x:Key="myItems">
            <local:MyItem Name="Item 1" />
            <local:MyItem Name="Item 2" />
            <local:MyItem Name="Item 3" />
        </local:MyItems>
        <Style TargetType="{x:Type ListBoxItem}">
            <Setter Property="OverridesDefaultStyle" Value="True" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ListBoxItem}">
                        <ContentPresenter Margin="0,0,0,4" />
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <ListBox ItemsSource="{StaticResource myItems}">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Border Margin="5" Padding="5" BorderBrush="Blue" BorderThickness="1">
                        <Border.Triggers>
                            <EventTrigger RoutedEvent="MouseEnter">
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation Duration="0:0:0.2" Storyboard.TargetName="controlBox" Storyboard.TargetProperty="Opacity" To="1" />
                                    </Storyboard>
                                </BeginStoryboard>
                            </EventTrigger>
                            <EventTrigger RoutedEvent="MouseLeave">
                                <BeginStoryboard>
                                    <Storyboard>
                                        <DoubleAnimation Duration="0" Storyboard.TargetName="controlBox" Storyboard.TargetProperty="Opacity" To="0" />
                                    </Storyboard>
                                </BeginStoryboard>
                            </EventTrigger>
                        </Border.Triggers>
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="*" />
                                <ColumnDefinition Width="Auto" />
                            </Grid.ColumnDefinitions>
                            <TextBlock Grid.Column="0" Text="{Binding Name}" />
                            <StackPanel Grid.Column="1" x:Name="controlBox" Opacity="0">
                                <Button Command="{Binding DataContext.DeleteCommand, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type local:MainWindow}}}"
                                        CommandParameter="{Binding}">Delete</Button>
                            </StackPanel>
                        </Grid>
                    </Border>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Window>

这是示例代码隐藏：

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
namespace WpfApplication2
{
  /// <summary>
  /// Interaction logic for MainWindow.xaml
  /// </summary>
  public partial class MainWindow : Window
  {
    public ICommand DeleteCommand { get; private set; }
    public MainWindow()
    {
      InitializeComponent();
      DeleteCommand = new MyCommand<MyItem>( Delete );
    }
    private void Delete( MyItem myItem )
    {
      MyItems myItems = Resources[ "myItems" ] as MyItems;
      myItems.Remove( myItem );
    }
  }
  public class MyItem : DependencyObject
  {
    public static readonly DependencyProperty NameProperty = DependencyProperty.Register( "Name", typeof( string ), typeof( MyItem ) );
    public string Name { get { return (string) GetValue( NameProperty ); } set { SetValue( NameProperty, value ); } }
  }
  public class MyItems : ObservableCollection<MyItem>
  { 
  }
  public class MyCommand<T> : ICommand
  {
    private readonly Action<T> executeMethod = null;
    private readonly Predicate<T> canExecuteMethod = null;
    public MyCommand( Action<T> execute )
      : this( execute, null )
    {
    }
    public MyCommand( Action<T> execute, Predicate<T> canExecute )
    {
      executeMethod = execute;
      canExecuteMethod = canExecute;
    }
    public event EventHandler CanExecuteChanged;
    public void NotifyCanExecuteChanged( object sender )
    {
      if( CanExecuteChanged != null )
        CanExecuteChanged( sender, EventArgs.Empty );
    }
    public bool CanExecute( object parameter )
    {
      return canExecuteMethod != null && parameter is T ? canExecuteMethod( (T) parameter ) : true;
    }
    public void Execute( object parameter )
    {
      if( executeMethod != null && parameter is T )
        executeMethod( (T) parameter );
    }
  }
}