如何在“导体收集”设置为“AllActive”时停用项

我在停用已经在ContentControl标签中定义的ViewModel时遇到了麻烦。我不想将Visibility设置为false，因为这似乎是一个不合适的解决方案。

这就是它看起来的样子，似乎在AllActive中，我们不需要激活每个项目:

<ContentControl Grid.Column="0" cal:View.Model="{Binding RandomScreenViewModel}"/>

这是导体在"OneActive"模式下的样子。然后我们可以调用ActivateItem和DeactivateItem其中Deactivate会关闭Content:

<ContentControl Grid.Column="0" x:Name="ActiveItem"}"/>

我希望激活项在AllActive期间关闭。这可能吗?在我看来，应该可以从AllActive中删除一个项目。

我对使用导体有点陌生，所以我希望有人能帮助我。: D

ShellView.xaml:

Window x:Class="SimpleConductorOneActive.Views.ShellView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:cal="http://www.caliburnproject.org"
        xmlns:local="clr-namespace:SimpleConductorOneActive.ViewModels"
        Title="MainWindow" Height="350" Width="550" Background="CornflowerBlue">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="*" />
        </Grid.RowDefinitions>
        <StackPanel Orientation="Horizontal" Grid.Row="0">
            <Button Content="New Screen" x:Name="NewScreen" />
            <TextBlock Text="Current Screen Count:" VerticalAlignment="Center" Padding="10,5,2,5"/>
            <TextBlock Text="{Binding Items.Count}" VerticalAlignment="Center" Padding="0,5,5,5"/>
        </StackPanel>
        <ContentControl Grid.Row="1" cal:View.Model="{Binding RandomScreenViewModel}" HorizontalAlignment="Center"  VerticalAlignment="Center"  Height="200" Width="180" Margin="342,0,20,10" Padding="5"/>
        <ListBox x:Name='Items' Grid.Row="2">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <StackPanel Orientation="Vertical" Width="60" Margin="5">
                        <TextBlock Text="Screen Id" FontWeight="Bold"  />
                        <TextBlock Text='{Binding DisplayName}'  
                                   Margin='5 5 5 5'   
                                   Padding="5 5 5 5"
                                   FontSize='12' 
                                   TextWrapping="NoWrap"/>
                    </StackPanel>
                </DataTemplate>
            </ListBox.ItemTemplate>
            <ListBox.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel Orientation='Horizontal' />
                </ItemsPanelTemplate>
            </ListBox.ItemsPanel>
        </ListBox>
    </Grid>
</Window>

ShellViewModel.cs:

public class ShellViewModel : Conductor<object>.Collection.AllActive
{
    public RandomScreenViewModel RandomScreenViewModel { get; set; }
    public int ScreenCount
    {
        get { return Items.Count; }
    }
    public ShellViewModel()
    {
        RandomScreenViewModel = new RandomScreenViewModel();
        NewScreen();
    }
    public void NewScreen()
    {
        ActivateItem(RandomScreenViewModel);
    }
}

RandomScreenView.xaml:

<UserControl x:Class="SimpleConductorOneActive.Views.RandomScreenView"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid Background="AliceBlue">
        <StackPanel Orientation="Vertical">
            <Button Content="Close" HorizontalAlignment="Right" Margin="5" x:Name="CloseScreen" />
            <TextBlock Text="Name:"/>
            <TextBlock x:Name="DisplayName"/>
        </StackPanel>
    </Grid>
</UserControl>

RandomScreenViewModel.cs:

   public class RandomScreenViewModel:Screen
    {
        public RandomScreenViewModel()
        {
            Guid id = Guid.NewGuid();
            DisplayName = id.ToString();
        }
        public void CloseScreen()
        {
            base.TryClose();
        }
    }