Use CollectionViewSource to sort and group data in XAML. : CollectionViewSource « Windows Presentation Foundation « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Windows Presentation Foundation
3. CollectionViewSource

<Window x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase"
  xmlns:src="clr-namespace:WpfApplication1"
  xmlns:dat="clr-namespace:System.Windows.Data;assembly=PresentationFramework" 
  Title="CollectionViewSourceSample">

  <Window.Resources>

    <src:Places x:Key="places"/>

    <CollectionViewSource Source="{StaticResource places}" x:Key="cvs">
      <CollectionViewSource.SortDescriptions>
        <scm:SortDescription PropertyName="CityName"/>
      </CollectionViewSource.SortDescriptions>
      <CollectionViewSource.GroupDescriptions>
        <dat:PropertyGroupDescription PropertyName="State"/>
      </CollectionViewSource.GroupDescriptions>
    </CollectionViewSource>

  </Window.Resources>
  <DockPanel>
    <ListBox ItemsSource="{Binding Source={StaticResource cvs}}" DisplayMemberPath="CityName" Name="lb">
      <ListBox.GroupStyle>
        <x:Static Member="GroupStyle.Default"/>
      </ListBox.GroupStyle>
    </ListBox>
  </DockPanel>
</Window>

//File:Window.xaml.cs

using System.Windows;
using System.Collections.ObjectModel;

namespace WpfApplication1
{

    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }


    }

    public class Place
    {
        private string name;

        private string state;

        public string CityName
        {
            get { return name; }
            set { name = value; }
        }

        public string State
        {
            get { return state; }
            set { state = value; }
        }

        public Place()
        {
            this.name = "";
            this.state = "";
        }

        public Place(string name, string state)
        {
            this.name = name;
            this.state = state;
        }
    }

    public class Places : ObservableCollection<Place>
    {
        public Places()
        {
            Add(new Place("A", "WA"));
            Add(new Place("B", "WA"));
            Add(new Place("C", "WA"));
        }
    }
}

24.139.CollectionViewSource
	24.139.1.	Use CollectionViewSource to sort and group data in XAML.
	24.139.2.	Create CollectionViewSource
	24.139.3.	Apply Custom Grouping to a Collection