Question

我正在使用WPFToolkit的AutoCompleteBox，我需要更改所选的项目背景颜色，但我无法做到。我可以改变字体样式，字体大小，而不是背景。

我尝试了很多来自SO的解决方案，但是没有一个能够奏效。到目前为止我尝试过的事情：

Change background color for selected ListBox item

Changing WPF Listbox SelectedItem text color and highlight/background Color using C#

使用触发器动态更改选定项目的背景

<Style  x:Key="myLBStyle" TargetType="ListBoxItem">
        <Setter Property="Background" Value="IndianRed" />
        <Setter Property="Foreground" Value="WhiteSmoke" />
        <Setter Property="Margin" Value="0" />
        <Setter Property="FontSize" Value="22" />
        <Style.Triggers>
            <Trigger Property="IsSelected" Value="true">
                <Setter Property="Background" Value="Chartreuse" />
                <Setter Property="FontStyle" Value="Italic" />
                <Setter Property="Foreground" Value="Chartreuse" />
            </Trigger>
        </Style.Triggers>
    </Style>

<local:FocusableAutoCompleteBox x:Name="ACBox" Margin="10,32,10,0"
    Grid.Row="2" FontSize="27" Grid.ColumnSpan="4" Foreground="#FF333333"
    Background="#FF1700FF" BorderThickness="2" TextChanged="_ACBox_TextChanged"
    KeyDown="ACBox_KeyDown" Focusable="True" MinimumPopulateDelay="100"
    MinimumPrefixLength="1" ItemContainerStyle="{DynamicResource ResourceKey=myLBStyle}">

我也尝试过覆盖系统颜色：

        <Style  x:Key="myLBStyle" TargetType="ListBoxItem">
        <Style.Resources>
            <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Red" />
            <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Green" />
        </Style.Resources>
        <Setter Property="Background" Value="IndianRed" />
        <Setter Property="Foreground" Value="WhiteSmoke" />
        <Setter Property="Margin" Value="0" />
        <Setter Property="FontSize" Value="22" />
    </Style>

我可以使用触发器成功设置其他属性。我可以将 selecteditem 的字体设置为斜体，粗体，更大，更小，但我无法更改所选项目的背景颜色。

Answer 1

<Style  x:Key="myLBStyle" TargetType="ListBoxItem">
    <Setter Property="Background" Value="IndianRed" />
    <Setter Property="Foreground" Value="WhiteSmoke" />
    <Setter Property="Margin" Value="0" />
    <Setter Property="FontSize" Value="22" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ListBoxItem}">
                <Grid Background="{TemplateBinding Background}">
                    <ContentPresenter></ContentPresenter>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
    <Style.Triggers>
        <Trigger Property="IsSelected" Value="true">
            <Setter Property="Background" Value="Chartreuse" />
            <Setter Property="FontStyle" Value="Italic" />
            <Setter Property="Foreground" Value="Chartreuse" />
        </Trigger>
    </Style.Triggers>
</Style>

设置AutoCompleteBox ListBox SelectedItem背景颜色

1 个答案: