<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="200" Width="300">
    <DockPanel LastChildFill="True">
        <DockPanel.Resources>
            <Style TargetType="{x:Type TreeViewItem}">
                <EventSetter Event="Selected" Handler="TreeViewItem_Selected" />
            </Style>
        </DockPanel.Resources>
        <Button Click="Button_Click" DockPanel.Dock="Bottom" Content="Show Selected" MaxHeight="23" MaxWidth="100" />
        <TreeView FontSize="16" Name="tvTree">
            <TreeViewItem Header="A" IsExpanded="True">
                <TreeViewItem Header="1">
                    <TreeViewItem Header="2" />
                    <TreeViewItem Header="3" />
                </TreeViewItem>
                <TreeViewItem Header="B" IsExpanded="True">
                    <TreeViewItem Header="11" />
                    <TreeViewItem Header="22" />
                </TreeViewItem>
            </TreeViewItem>
            <TreeViewItem Header="C">
                <TreeViewItem Header="E">
                    <TreeViewItem Header="111" />
                    <TreeViewItem Header="222" />
                    <TreeViewItem Header="333" />
                </TreeViewItem>
                <TreeViewItem Header="F">
                    <TreeViewItem Header="1111" />
                    <TreeViewItem Header="2222" />
                    <TreeViewItem Header="333" />
                </TreeViewItem>
            </TreeViewItem>
        </TreeView>
    </DockPanel>
</Window>

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void TreeViewItem_Selected(object sender, RoutedEventArgs e)
        {
            TreeViewItem item = sender as TreeViewItem;
            if (item == e.OriginalSource)
            {
                Console.WriteLine(item.Header);
                Console.WriteLine(item.Items.Count);
            }
            else
            {
                Console.WriteLine("Parent of selected");
                Console.WriteLine(item.Header);
                Console.WriteLine(item.Items.Count);
            }
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            TreeViewItem item = tvTree.SelectedItem as TreeViewItem;

            if (item != null)
            {
                MessageBox.Show("Item selected: " + item.Header, Title);
            }
            else
            {
                MessageBox.Show("No item selected", Title);
            }
        }
    }
}

   
    
     

   
  


<Window x:Class="TreeViewDataBinding.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="TreeViewDataBinding"
    xmlns:EngNews="clr-namespace:TreeViewDataBinding">

  <Window.Resources>
    <ObjectDataProvider x:Key="EasternHemisphereDataSource" ObjectType="{x:Type EngNews:WebSiteGroupA}"/>
    <ObjectDataProvider x:Key="WesternHemisphereDataSource" ObjectType="{x:Type EngNews:WebSiteGroupB}"/>
    <DataTemplate x:Key="NewspaperTVItem">
      <DockPanel>
        <Image Source="c:image.jpg"/>
        <TextBlock VerticalAlignment="center" Text ="{Binding Path=Name}"/>
      </DockPanel>
    </DataTemplate>
    <DataTemplate x:Key="WesternHemisphereHeaderTemplate">
      <DockPanel>
        <Ellipse Width="7" Height="7"  Fill="Blue" DockPanel.Dock="Left"/>
        <TextBlock Margin="2,0,0,0" VerticalAlignment="Center" DockPanel.Dock="Right">
          test
        </TextBlock>
      </DockPanel>
    </DataTemplate>
    <DataTemplate x:Key="EasternHemisphereHeaderTemplate">
      <DockPanel>
        <Ellipse Width="7" Height="7"  Fill="Blue" DockPanel.Dock="Left"/>
        <TextBlock DockPanel.Dock="Right">Eastern Hemisphere</TextBlock>
      </DockPanel>
    </DataTemplate>
  </Window.Resources>
  <StackPanel>
      <TreeView Name="WebSiteEntrys" SelectedItemChanged="SelectedNewspaperChanged">
        <TreeViewItem HeaderTemplate="{StaticResource WesternHemisphereHeaderTemplate}" 
                      ItemsSource="{Binding Source={StaticResource WesternHemisphereDataSource}}"
                      ItemTemplate="{StaticResource NewspaperTVItem}"/>
        <TreeViewItem HeaderTemplate="{StaticResource EasternHemisphereHeaderTemplate}"
                      ItemsSource="{Binding Source={StaticResource EasternHemisphereDataSource}}"
                      ItemTemplate="{StaticResource NewspaperTVItem}"/>
      </TreeView>
    <Frame Name = "NewspaperFrame" Content="this is a test."/>
  </StackPanel>
</Window>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Shapes;
using System.Collections.ObjectModel;

namespace TreeViewDataBinding
{
    public partial class Window1 : Window{
        public Window1(){
            InitializeComponent();
        }
        private void SelectedNewspaperChanged(object sender,RoutedPropertyChangedEventArgs<Object> e){
            WebSiteEntry engnews = WebSiteEntrys.SelectedItem as WebSiteEntry;
            if( engnews != null ) NewspaperFrame.Navigate(new System.Uri(engnews.Website));
        }
    }
    public class WebSiteEntry{
        private string _name;
        private string _website;

        public string Website
        {
            get { return _website; }
            set { _website = value; }
        }

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

        public WebSiteEntry(string name, string website)
        {
            Name = name;
            Website = website;
        }
    }
    public class WebSiteGroupA : ObservableCollection<WebSiteEntry>
    {
        public WebSiteGroupA()
        {
            Add(new WebSiteEntry("A","http://www.A.com"));
            Add(new WebSiteEntry("B","http://www.B.com"));
            Add(new WebSiteEntry("C","http://www.C.com"));
        }
    }

    public class WebSiteGroupB : ObservableCollection<WebSiteEntry>
    {
        public WebSiteGroupB()
        {
            Add(new WebSiteEntry("D","http://www.D.com/"));
            Add(new WebSiteEntry("E","http://www.E.net/"));
            Add(new WebSiteEntry("F","http://www.F.com"));
        }
    }
}

   
    
     

   
    
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      HorizontalAlignment="Center" VerticalAlignment="Center">

<TreeView>
  <TreeViewItem Header="A" IsExpanded="True">
    <TreeViewItem Header="B" />
    <TreeViewItem Header="C" IsExpanded="True">
      <TreeViewItem Header="D" />
      <TreeViewItem Header="E" />
    </TreeViewItem>
    <TreeViewItem Header="F" />
  </TreeViewItem>
  <TreeViewItem IsExpanded="True">
    <TreeViewItem.Header>
      <StackPanel Orientation="Horizontal">
        <Ellipse Fill="Blue" Width="15" Height="15" />
        <TextBlock Text="Third top-level item" />
        <Ellipse Fill="Blue" Width="15" Height="15" />
      </StackPanel>
    </TreeViewItem.Header>
    <TreeViewItem Header="Child a" />
    <TreeViewItem Header="Child b" />
    <TreeViewItem Header="Child c" />
  </TreeViewItem>
</TreeView>
</Page>

   
    
    
    
     

   
    
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      HorizontalAlignment="Center" VerticalAlignment="Center">

<TreeView>
  <TreeViewItem Header="A" IsExpanded="True">
    <TreeViewItem Header="B" />
    <TreeViewItem Header="C" IsExpanded="True">
      <TreeViewItem Header="D" />
      <TreeViewItem Header="E" />
    </TreeViewItem>
    <TreeViewItem Header="F" />
  </TreeViewItem>
  <TreeViewItem IsExpanded="True">
    <TreeViewItem.Header>
      <StackPanel Orientation="Horizontal">
        <Ellipse Fill="Blue" Width="15" Height="15" />
        <TextBlock Text="Third top-level item" />
        <Ellipse Fill="Blue" Width="15" Height="15" />
      </StackPanel>
    </TreeViewItem.Header>
    <TreeViewItem Header="Child a" />
    <TreeViewItem Header="Child b" />
    <TreeViewItem Header="Child c" />
  </TreeViewItem>
</TreeView>
</Page>

   
    
    
    
     

   
    

<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      HorizontalAlignment="Center" VerticalAlignment="Center">

<TreeView>
  <TreeViewItem Header="A" IsExpanded="True">
    <TreeViewItem Header="B" />
    <TreeViewItem Header="C" IsExpanded="True">
      <TreeViewItem Header="D" />
      <TreeViewItem Header="E" />
    </TreeViewItem>
    <TreeViewItem Header="F" />
  </TreeViewItem>
  <TreeViewItem Header="G">
    <TreeViewItem Header="Child a" />
    <TreeViewItem Header="Child b" />
    <TreeViewItem Header="Child c" />
  </TreeViewItem>
</TreeView>
</Page>

   
    
    
    
     

   
   

<Window x:Class="SimpleStyles.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="SimpleStyles"
  Background="#F8F8F8">
  <ScrollViewer>
    <WrapPanel>
       <HeaderedItemsControl Header="TreeView">
        <StackPanel>
          <TreeView Width="150" Height="150" Margin="8">
            <TreeViewItem Header="Top One">
              <TreeViewItem Header="Sub One" />
              <TreeViewItem Header="Sub Two (Longer than Normal)" />
              <TreeViewItem Header="Sub Three" />
              <TreeViewItem Header="Sub Four">
                <TreeViewItem Header="Sub One" />
                <TreeViewItem Header="Sub Two" />
                <TreeViewItem Header="Sub Three" />
              </TreeViewItem>
              <TreeViewItem Header="Sub Five" />
            </TreeViewItem>
            <TreeViewItem Header="Top Two">
              <TreeViewItem Header="Sub One" />
              <TreeViewItem Header="Checkable" />
              <TreeViewItem Header="Sub Three" />
              <TreeViewItem Header="Sub Four">
                <TreeViewItem Header="Sub One" />
                <TreeViewItem Header="Sub Two" />
                <TreeViewItem Header="Sub Three" />
              </TreeViewItem>
              <TreeViewItem Header="Sub Five" />
            </TreeViewItem>
            <TreeViewItem Header="Top Three" >
              <TreeViewItem Header="Sub One" />
              <TreeViewItem Header="Sub Two" />
              <TreeViewItem Header="Sub Three" />
              <TreeViewItem Header="Sub Five" />
            </TreeViewItem>
          </TreeView>
        </StackPanel>
      </HeaderedItemsControl>
   
    </WrapPanel>
  </ScrollViewer>
</Window>

   
    
    
     

   
   
<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      Title="Authors and Their Books">
    <Page.Resources>
        <XmlDataProvider x:Key="data" XPath="Authors">
            <x:XData>
                <Authors xmlns="">
                    <Author Name="Jane Austen">
                        <BirthDate>1972</BirthDate>
                        <DeathDate>2010</DeathDate>
                        <Books>
                            <Book Title="A">
                                <PubDate>2003</PubDate>
                            </Book>
                            <Book Title="B">
                                <PubDate>1813</PubDate>
                            </Book>
                        </Books>
                    </Author>
                </Authors>
            </x:XData>
        </XmlDataProvider>
        <HierarchicalDataTemplate DataType="Author" ItemsSource="{Binding XPath=Books/Book}">
            <StackPanel Orientation="Horizontal">
                <TextBlock Text="{Binding XPath=@Name}" />
                <TextBlock Text=" (" />
                <TextBlock Text="{Binding XPath=BirthDate}" />
                <TextBlock Text="-" />
                <TextBlock Text="{Binding XPath=DeathDate}" />
                <TextBlock Text=")" />
            </StackPanel>
        </HierarchicalDataTemplate>
        <HierarchicalDataTemplate DataType="Book">
            <StackPanel Orientation="Horizontal" TextBlock.FontSize="10pt">
                <TextBlock Text="{Binding XPath=@Title}" />
                <TextBlock Text="{Binding XPath=PubDate}" />
            </StackPanel>
        </HierarchicalDataTemplate>
    </Page.Resources>
    <TreeView ItemsSource="{Binding Source={StaticResource data}, XPath=Author}" />
</Page>