我有一个带有两个ListBox的WPF窗口 . 两个项目在运行时从视图模型添加，ListBox2（SelectionMode =“Multiple”）的项目依赖于ListBox1（SelectionMode =“Single”）选定项目 .

现在，每当用户选择/取消选择ListBox2中的项时，我想更新ListBox1的所选项的背景 . 如果ListBox2的选定项目数> 0，则ListBox1的selectedItem的背景应该更新 .

此外，我希望无论选择哪个项目都保留背景，即假设我在ListBox1中的Obj 1并且我在ListBox2中选择了一些项目，现在即使我在ListBox1中选择Obj 3，Obj1的背景也不应该改变 . 我已经有一个哈希集来存储ListBox2的所有选定项目在后面的代码中，在ListBox2的选择更改事件上添加/删除项目 .

是否可以从后面的代码或使用样式触发器执行此操作？

这是使事情更清晰的代码

<Border Grid.Column="1">
    <Grid>
        <ListBox x:Name="ListBox1" Style="{StaticResource ListBoxStyle}" SelectionMode="Single"
        SelectionChanged="ListBox1_SelectionChanged">
            <ListBox.ItemContainerStyle>
                <Style TargetType="ListBoxItem">
                    <Setter Property="FocusVisualStyle" Value="{x:Null}" />
                    <Setter Property="HorizontalContentAlignment" Value="Stretch"></Setter>
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="ListBoxItem">
                                <ContentPresenter />
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </ListBox.ItemContainerStyle>
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Border x:Name="ObjBorder" Height="45">
                        <Grid x:Name="lstItemGrid" Background="Transparent">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="0.8*"/>
                                <ColumnDefinition Width="0.2*"/>
                            </Grid.ColumnDefinitions>
                            <Border Grid.Column="0" Height="45">
                                <TextBlock x:Name="Text" Text="{Binding LB1Name}" />
                            </Border>

                            <Path Grid.Column="1" x:Name="CheckMark" Style="{StaticResource CheckStyle}">
                            </Path>
                        </Grid>
                    </Border>
                    <DataTemplate.Triggers>
                        <DataTrigger Binding="{Binding Path=IsVisible, ElementName=CheckMark}" Value="Visible">
                            <Setter Property="Background" TargetName="lstItemGrid" Value="Red"/>
                        </DataTrigger>
                    </DataTemplate.Triggers>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Border>

<Border Grid.Column="2" BorderThickness="0" VerticalAlignment="Stretch">
    <Grid>
        <ListBox x:Name="ListBox2" Style="{StaticResource ListBoxStyle}" SelectionMode="Multiple"   SelectionChanged="ListBox2_SelectionChanged">
            <ListBox.ItemContainerStyle>
                <Style TargetType="ListBoxItem">
                    <Setter Property="FocusVisualStyle" Value="{x:Null}" />
                    <Setter Property="HorizontalContentAlignment" Value="Stretch"></Setter>
                    <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="ListBoxItem">
                            <ContentPresenter />
                        </ControlTemplate>
                    </Setter.Value>
                    </Setter>
                </Style>
            </ListBox.ItemContainerStyle>
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <Border x:Name="ObjBorder" BorderBrush="Transparent" Height="45">
                        <Grid x:Name="lstItemGrid" Background="Transparent">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="0.8*"/>
                                <ColumnDefinition Width="0.2*"/>
                            </Grid.ColumnDefinitions>
                            <Border Grid.Column="0" Height="45">
                                <TextBlock x:Name="Text" Text="{Binding LB2Name}" />
                            </Border>

                            <Path Grid.Column="1" x:Name="CheckMark" Style="{StaticResource CheckStyle}"></Path>
                        </Grid>
                    </Border>
                    <DataTemplate.Triggers>
                        <DataTrigger Binding="{Binding Path=IsSelected,
                            RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListBoxItem}}}" Value="True">
                            <Setter Property="Background" TargetName="lstItemGrid" Value="Red"/>
                            <Setter Property="Visibility" TargetName="CheckMark" Value="Visible"/>
                        </DataTrigger>
                    </DataTemplate.Triggers>
                </DataTemplate>
            </ListBox.ItemTemplate>
        </ListBox>
    </Grid>
</Border>
c# wpf listbox