WPF ListBoxItem Selected and background changed at the same time via ItemContainerStyle
<Window.Resources> <Style x:Key="lbxItemContainerStyle" 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="Red"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </Window.Resources> <ListBox Grid.Column="0" ItemContainerStyle="{StaticResource lbxItemContainerStyle}" ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" DisplayMemberPath="Id"/>
//xaml <Window x:Class="WpfApp14.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" WindowState="Maximized" xmlns:local="clr-namespace:WpfApp14" mc:Ignorable="d" Title="MainWindow" Height="450" Width="800"> <Window.DataContext> <local:BookVM/> </Window.DataContext> <Window.Resources> <Style x:Key="lbxItemContainerStyle" 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="Red"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </Window.Resources> <Grid> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <ListBox Grid.Column="0" ItemContainerStyle="{StaticResource lbxItemContainerStyle}" ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" DisplayMemberPath="Id"/> <ListBox Grid.Column="1" ItemContainerStyle="{StaticResource lbxItemContainerStyle}" ItemsSource="{Binding BooksCollection,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" IsSynchronizedWithCurrentItem="True" DisplayMemberPath="Name"/> </Grid> </Window> //cs using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.ComponentModel; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace WpfApp14 { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } } public class BookVM : INotifyPropertyChanged { public BookVM() { InitData(); } private void InitData() { BooksCollection = new ObservableCollection<Book>(); for (int i = 0; i < 10000; i++) { BooksCollection.Add(new Book() { Id = i + 1, Name = $"Name_{i + 1}" }); } } public event PropertyChangedEventHandler PropertyChanged; private void OnPropertyChanged(string propName) { var handler = PropertyChanged; if (handler != null) { handler?.Invoke(this, new PropertyChangedEventArgs(propName)); } } private ObservableCollection<Book> booksCollection; public ObservableCollection<Book> BooksCollection { get { return booksCollection; } set { if (value != booksCollection) { booksCollection = value; OnPropertyChanged(nameof(BooksCollection)); } } } } public class Book { public int Id { get; set; } public string Name { get; set; } } }
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