WPF tutorial - ListView grouping

http://www.wpf-tutorial.com/listview-control/listview-grouping/

<Grid Margin="10">
        <ListView Name="lvUsers">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Name" Width="120" DisplayMemberBinding="{Binding Name}" />
                    <GridViewColumn Header="Age" Width="50" DisplayMemberBinding="{Binding Age}" />
                </GridView>
            </ListView.View>
 
            <ListView.GroupStyle>
                <GroupStyle>
                    <GroupStyle.HeaderTemplate>
                        <DataTemplate>
                            <TextBlock FontWeight="Bold" FontSize="14" Text="{Binding Name}"/>
                        </DataTemplate>
                    </GroupStyle.HeaderTemplate>
                </GroupStyle>
            </ListView.GroupStyle>
        </ListView>
    </Grid>

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
 
            List<User> items = new List<User>();
            items.Add(new User() { Name = "John Doe", Age = 42, Sex = SexType.Male });
            items.Add(new User() { Name = "Jane Doe", Age = 39, Sex = SexType.Female });
            items.Add(new User() { Name = "Sammy Doe", Age = 13, Sex = SexType.Male });
            lvUsers.ItemsSource = items;
 
            CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(lvUsers.ItemsSource);
            PropertyGroupDescription groupDescription = new PropertyGroupDescription("Sex");
            view.GroupDescriptions.Add(groupDescription);
        }
    }
 
    public enum SexType { Male, Female };
 
    public class User
    {
        public string Name { get; set; }
 
        public int Age { get; set; }
 
        public string Mail { get; set; }
 
        public SexType Sex { get; set; }
    }
}

<ListView.GroupStyle>
                <GroupStyle>
                    <GroupStyle.HeaderTemplate>
                        <DataTemplate>

<TextBlock Text="{Binding Name}"/>TextBlock의 Text는 Name에 바인딩이 되어있는 상태이지만, data 객체는 Name 속성이 아닙니다.

CollectionView view = (CollectionView)CollectionViewSource.GetDefaultView(lvUsers.ItemsSource);

ItemsSources를 할당한 후에는 ListView가 생성한 CollectionView를 이용합니다.

Customizing the group header

어.. 뭐지.. 좀 복잡하다 계속 공부해봐야겠습니다.

   <Grid Margin="10">
        <ListView Name="lvUsers">
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Name" Width="120" DisplayMemberBinding="{Binding Name}" />
                    <GridViewColumn Header="Age" Width="50" DisplayMemberBinding="{Binding Age}" />
                </GridView>
            </ListView.View>
 
            <ListView.GroupStyle>
                <GroupStyle>
                    <GroupStyle.ContainerStyle>
                        <Style TargetType="{x:Type GroupItem}">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate>
                                        <Expander IsExpanded="True">
                                            <Expander.Header>
                                                <StackPanel Orientation="Horizontal">
                                                    <TextBlock Text="{Binding Name}" FontWeight="Bold" Foreground="Gray" FontSize="22" VerticalAlignment="Bottom" />
                                                    <TextBlock Text="{Binding ItemCount}" FontSize="22" Foreground="Green" FontWeight="Bold" FontStyle="Italic" Margin="10,0,0,0" VerticalAlignment="Bottom" />
                                                    <TextBlock Text=" item(s)" FontSize="22" Foreground="Silver" FontStyle="Italic" VerticalAlignment="Bottom" />
                                                </StackPanel>
                                            </Expander.Header>
                                            <ItemsPresenter />
                                        </Expander>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </GroupStyle.ContainerStyle>
                </GroupStyle>
            </ListView.GroupStyle>
        </ListView>
    </Grid>