为 ListBox 中的选定项目设置背景颜色 [英] Set background color for selected items in a ListBox

问题描述

我无法为列表框中的选定项目设置背景颜色.我不想要这个例子中的交替颜色.我把它们作为测试，它们工作.当字体粗体变为粗体且前景变为红色时，触发器 IsSelected 正在触发.将高亮颜色笔刷设置为 SteelBlue 不会达到预期的效果，因为它会在 ListBox 失去焦点时消失.当 ListBox 失去焦点并且是我想要的时，红色和粗体确实保持不变.我希望为所选项目采用并保留背景颜色.现在，所选项目的背景是白色的，并且在 ListBox 失去焦点时保持不变.感谢您的帮助，我将测试任何建议的修复.

I cannot set the background color for the selected item on a list box. I don't want the alternating colors in this example. I put them in as a test and they work. Trigger IsSelected is firing as the fontweight goes to bold and the foreground goes to red. Setting highlight color brush to SteelBlue does not achieve the desired effect as it goes away when the ListBox loses focus. Red and bold does hold when the ListBox loses focus and is what I want. I want the background color to take and hold for the selected item. Right now the background for the selected items is white and holds when the ListBox loses focus. Thanks for your help and I will test any proposed fix.

    <ListBox Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="1" Name="WFEnum" Visibility="Visible" BorderThickness="2" Margin="1" Padding="2,2,7,2"
             ItemsSource="{Binding Path=SearchItem.SrchWorkFlows}" HorizontalAlignment="Left" 
             PresentationTraceSources.TraceLevel="High" AlternationCount="2" >
        <ListBox.ItemContainerStyle>
            <Style TargetType="ListBoxItem">
                <Setter Property="VerticalContentAlignment" Value="Center" />
                <Style.Triggers>
                    <Trigger Property="ItemsControl.AlternationIndex" Value="0">
                        <Setter Property="Background" Value="LightGreen"></Setter>
                    </Trigger>
                    <Trigger Property="ItemsControl.AlternationIndex" Value="1">
                        <Setter Property="Background" Value="LightPink"></Setter>
                    </Trigger>
                    <Trigger Property="IsSelected" Value="True" >
                        <Setter Property="FontWeight" Value="Bold" />
                        <Setter Property="Background" Value="SteelBlue" />
                        <Setter Property="Foreground" Value="Red" />
                    </Trigger>
                </Style.Triggers>
                <Style.Resources>
                    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent"/>
                </Style.Resources>
            </Style>
        </ListBox.ItemContainerStyle>
        <ListBox.ItemTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Path=Name, Mode=OneWay}" Background="Transparent" />
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

推荐答案

您使用 SystemColors.HighlightBrushKey(聚焦)和 SystemColors.ControlBrushKey(不聚焦)为 ListBox 指定 SelectedItem 背景

You specify the SelectedItem Background for a ListBox with the SystemColors.HighlightBrushKey (focused) and SystemColors.ControlBrushKey (not focused)

<Style.Resources>
    <!-- Background of selected item when focussed -->
    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
                     Color="Green"/>
    <!-- Background of selected item when not focussed -->
    <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}"
                     Color="LightGreen" />
</Style.Resources> 

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