Question

我想更改ListBox的SelectedItem的背景颜色。我尝试了以下代码：

<ListBox Grid.Column="0" ScrollViewer.HorizontalScrollBarVisibility="Hidden" 
         ItemsSource="{Binding Parents}" DisplayMemberPath="Title"
         Height="35" FontSize="18" BorderThickness="0" Background="#FF2A2A2A" 
         Foreground="White" SelectedIndex="0">

    <ListBox.ItemsPanel>
        <ItemsPanelTemplate>
            <StackPanel IsItemsHost="True" Orientation="Horizontal"/>
        </ItemsPanelTemplate>
    </ListBox.ItemsPanel>

    <ListBox.ItemContainerStyle>
        <Style TargetType="{x:Type ListBoxItem}">
            <Style.Triggers>
                <Trigger Property="IsSelected" Value="True">
                    <Setter Property="BorderThickness" Value="0" />
                    <Setter Property="Background" Value="Transparent" />
                    <Setter Property="Foreground" Value="DodgerBlue" />
                </Trigger>
            </Style.Triggers>

            <Style.Resources>
                <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" 
                                 Color="Transparent"/>
                <SolidColorBrush x:Key="{x:Static SystemColors.InactiveSelectionHighlightBrushKey}"
                                 Color="Transparent" />
            </Style.Resources>
        </Style>
    </ListBox.ItemContainerStyle>
</ListBox>

但是我看不到SelectedItems的背景颜色有任何变化。任何人都可以在上面的XAML中指出错误吗？

此外，我想对此特定ListBox使用此样式，因此我不想更改ControlTemplate。

Answer 1

在.NET 4.5系统默认情况下不使用SystemColors，因此您应该：

1）创建自己的Style / ControlTemplate;

2）在this示例中创建一个BlankListBoxContainer：

<Style x:Key="BlankListBoxContainerStyle" TargetType="{x:Type ListBoxItem}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" 
                                  SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                  VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
            </ControlTemplate>
        </Setter.Value>
    </Setter>

   <Setter Property="FocusVisualStyle" Value="{x:Null} "/>
</Style>

3）删除框架之间的差异，例如this：

FrameworkCompatibilityPreferences.AreInactiveSelectionHighlightBrushKeysSupported = false;

在创建任何窗口之前

，例如在InitializeComponent()之前。

来自MSDN：

<强> AreInactiveSelectionHighlightBrushKeysSupported:

获取或设置一个值，该值指示应用程序是否应使用InactiveSelectionHighlightBrush和InactiveSelectionHighlightTextBrush属性作为非活动所选项的颜色。

Answer 2

试试这个：

                <ListBox Grid.Column="1" Grid.Row="1" Margin="2" SelectionMode="Multiple" ItemsSource="{Binding NavigationMenuItems}" DisplayMemberPath="Name">
                    <ListBox.ItemContainerStyle>
                        <Style TargetType="{x:Type ListBoxItem}">
                            <Setter Property="IsSelected" Value="{Binding Mode=TwoWay, Path=IsSelected}"/>
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="{x:Type ListBoxItem}">
                                        <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                                            <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                                        </Border>
                                        <ControlTemplate.Triggers>
                                            <Trigger Property="IsSelected" Value="true">
                                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                                            </Trigger>
                                            <Trigger Property="IsEnabled" Value="false">
                                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                                            </Trigger>
                                        </ControlTemplate.Triggers>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </ListBox.ItemContainerStyle>
                </ListBox>

在.NET 4.5 WPF中更改ListBox中SelectedItem的背景颜色

2 个答案: