小编use*_*848的帖子

我有列表框控件,其中包含颜色列表.这是代码和图片:

<ListBox Name="FillSelections" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Center" SelectedItem="{Binding SelectedColor}" SelectionMode="Single" Style="{StaticResource HorizontalListBoxStyle}" ItemsSource="{Binding FillColors}" ItemTemplate="{StaticResource ColorsItemTemplate}"></ListBox>

 <DataTemplate x:Key="ColorsItemTemplate">
    <Border BorderBrush="Transparent">
        <Rectangle Width="20" StrokeThickness="1" Stroke="Black">
            <Rectangle.Fill>
                <SolidColorBrush Color="{Binding}" />
            </Rectangle.Fill>
        </Rectangle>
    </Border>

图片:

我如何才能像这样更改最后一项的样式:

我有ListBox控制权；我将如何使用下面的代码设置ToolTip每个ListBoxItem。

<ListBox Name="FillSelections" 
         VerticalContentAlignment="Stretch"
         Margin="1, 3, 1, 3"
         IsEnabled="True" 
         Grid.Column="0" 
         Background="Transparent"
         HorizontalContentAlignment="Center"
         SelectedItem="{Binding SelectedColor}"
         SelectionMode="Single"
         Style="{StaticResource HorizontalListBoxStyle}"
         ItemsSource="{Binding FillColors}"
         ItemTemplate="{StaticResource ColorsItemTemplate}">
</ListBox>

<DataTemplate x:Key="ColorsItemTemplate">
    <Border Width="20" 
            Height="16"
            BorderBrush="Black"
            BorderThickness="1">
        <Border.Background>
            <SolidColorBrush Color="{Binding}" />
        </Border.Background>
        <Path Stroke="Red" 
              StrokeThickness="3"
              x:Name="abc"
              Visibility="Hidden">
            <Path.Data>
                <LineGeometry StartPoint="0,16" EndPoint="20,0"/>
            </Path.Data>
        </Path>
    </Border>
    <DataTemplate.Triggers>
        <DataTrigger Binding="{Binding}" Value="#00FFFFFF">
            <Setter TargetName="abc" Property="Visibility" Value="Visible"/>
        </DataTrigger>
    </DataTemplate.Triggers>
</DataTemplate>