Group Data in a Collection


   
  

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:WpfApplication1="clr-namespace:WpfApplication1"
     Title="WPF" Height="294" Width="160">
    <Window.Resources>
        <WpfApplication1:Countries x:Key="countries"/>
        <CollectionViewSource x:Key="cvs" Source="{Binding Source={StaticResource countries}}">
            <CollectionViewSource.GroupDescriptions>
                <PropertyGroupDescription PropertyName="Continent"/>
            </CollectionViewSource.GroupDescriptions>
        </CollectionViewSource>
        <DataTemplate x:Key="groupingHeaderTemplate">
            <Label VerticalAlignment="Center" Content="{Binding}" ></Label>
        </DataTemplate>
    </Window.Resources>

    <Grid>
        <ItemsControl ItemsSource="{Binding Source={StaticResource cvs}}" DisplayMemberPath="Name">
            <ItemsControl.GroupStyle>
                <GroupStyle HeaderTemplate= "{StaticResource groupingHeaderTemplate}" />
            </ItemsControl.GroupStyle>
        </ItemsControl>
    </Grid>
</Window>
//File:Window.xaml.cs
using System.Collections.ObjectModel;

namespace WpfApplication1
{
    public class Country
    {
        private string name;
        private Continent continent;

        public Country(string name, Continent continent)
        {
            this.name = name;
            this.continent = continent;
        }

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

        public Continent Continent
        {
            get
            {
                return continent;
            }
            set
            {
                continent = value;
            }
        }
    }

    public enum Continent
    {
        Europe,
        NorthAmerica,
    }

    public class Countries : Collection<Country>
    {
        public Countries()
        {
            this.Add(new Country("Great Britan", Continent.Europe));
            this.Add(new Country("USA", Continent.NorthAmerica));
            this.Add(new Country("Canada", Continent.NorthAmerica));
        }
    }
}