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

c#, listbox, wpf

Solution

Solution:

<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>

Problem

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; ``` But this seems to do nothing. Is there any way to achieve this? EDIT: Per suggestions, I tried using DynamicResources to achieve this, but so far this has not been successful either. My code for this: DYNAMICRESOURCES ``` <UserControl.Resources> <Color x:Key="ListTextSelectedColor"/> <Color x:Key="ListSelectedColor"/> </UserControl.Resources> ``` LISTBOX ``` <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> ``` APPLYING RESOURCES IN C# ``` this.Resources["ListSelectedColor"] = SETING.ListSelectedColor.Color; this.Resources["ListTextSelectedColor"] = SETTING.ListSelectedTextColor.Color; ```

Original source

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