Question

I am unable to select desired item from the listbox
(when i click on any item in that listbox the items more than one are getting selected but not the one on which i have clicked). Also the background color of the selected items are getting changed to default (white) color.
The Xaml code used by me is as follows:

<ListBox x:Uid="lst_value" Name="lstValues" Background="Wheat"
    BorderBrush="Black" HorizontalAlignment="Left" VerticalAlignment="Top"
    BorderThickness="1" Height="100" Width="150" ItemsSource="{Binding listval}">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <StackPanel Orientation="Vertical" Background="Wheat">
                <TextBlock x:Name="txtblk" Foreground="Black" FontSize="10"
                    TextAlignment="Left" FontWeight="Black" Text="{Binding}"
                    Background="Wheat"/>
            </StackPanel>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

Could anyone let me know how to resolve the issue please.

Answer 1

You should not set the Background on the StackPanel and TextBlock, that obfuscates the selection. To override the background for the selection add resources to your ListBoxItems.

<ListBox.ItemContainerStyle>
    <Style TargetType="ListBoxItem">
        <Style.Resources>
            <!-- Selected Brush -->
            <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Green" />
            <!-- Selected but out of focus Brush -->
            <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="LightGreen" />
        </Style.Resources>
        <!-- If you must set a Background, do it here, should be superfluous though as the ListBox.Background is the same -->
        <Setter Property="Background" Value="Wheat" />
    </Style>
</ListBox.ItemContainerStyle>

The selection issue can appear if you have a source collection with identical objects (like strings that have the same value).