使用 C# 更改 WPF 列表框 SelectedItem 文本颜色和突出显示/背景颜色 [英] Changing WPF Listbox SelectedItem text color and highlight/background Color using C#

问题描述

我正在尝试在运行时更改 wpf 列表框的突出显示(选定)颜色和突出显示的文本颜色.我尝试创建一个样式并按如下方式应用它:

I am trying to change the highlighted(selected) color and the highlighted text color of a wpf listbox at runtime. I have tried creating a style and applying it as follows:

    Style s = new Style(typeof(ListBox));
    s.Resources.Add(SystemColors.HighlightBrushKey, Setting.ListSelectedColor);
    s.Resources.Add(SystemColors.HighlightTextBrushKey, Setting.ListSelectedTextColor);
    lstGames.Style = s;

但这似乎无济于事.有什么方法可以实现吗?

But this seems to do nothing. Is there any way to achieve this?

根据建议，我尝试使用 DynamicResources 来实现这一点，但到目前为止这也没有成功.我的代码:

Per suggestions, I tried using DynamicResources to achieve this, but so far this has not been successful either. My code for this:

动态资源

<UserControl.Resources>
    <Color x:Key="ListTextSelectedColor"/>
    <Color x:Key="ListSelectedColor"/>
</UserControl.Resources>

列表框

        <ListBox ScrollViewer.HorizontalScrollBarVisibility="Hidden" ScrollViewer.VerticalScrollBarVisibility="Hidden" 
             Name="lstGames" Margin="20" Grid.Row="2" Grid.Column="2" 
             SelectionChanged="lstGames_SelectionChanged" Grid.RowSpan="2" Grid.ColumnSpan="2" 
             Background="{x:Null}" BorderBrush="{x:Null}" SelectionMode="Single"
             FontSize="18" FontFamily="OCR A Extended">
        <Style TargetType="ListBox">
            <Style.Resources>
                <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="{DynamicResource ListSelectedColor}"/>
                <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="{DynamicResource ListSelectedColor}"/>
                <SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="{DynamicResource ListTextSelectedColor}"/>
                <SolidColorBrush x:Key="{x:Static SystemColors.ControlTextBrushKey}" Color="{DynamicResource ListTextSelectedColor}"/>
            </Style.Resources>
        </Style>
    </ListBox>

在 C# 中应用资源

this.Resources["ListSelectedColor"] = SETING.ListSelectedColor.Color;
this.Resources["ListTextSelectedColor"] = SETTING.ListSelectedTextColor.Color;

推荐答案

解决方案:

<Window x:Class="ListBoxStyle.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:src="clr-namespace:ListBoxStyle"
        Title="MainWindow" Height="350" Width="525">
    <Window.Resources>
        <Style x:Key="_ListBoxItemStyle" TargetType="ListBoxItem">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="ListBoxItem">
                        <Border Name="_Border"
                                Padding="2"
                                SnapsToDevicePixels="true">
                            <ContentPresenter />
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter TargetName="_Border" Property="Background" Value="Yellow"/>
                                <Setter Property="Foreground" Value="Red"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <ListBox ItemContainerStyle="{DynamicResource _ListBoxItemStyle}"
                 Width="200" Height="250"
                 ScrollViewer.VerticalScrollBarVisibility="Auto"
                 ScrollViewer.HorizontalScrollBarVisibility="Auto">
            <ListBoxItem>Hello</ListBoxItem>
            <ListBoxItem>Hi</ListBoxItem>
        </ListBox>
    </Grid>
</Window>

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