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    <p>TreeViews work differently. The Items inside a HierarchicalDataTemplate <em>are</em> TreeViewItems and any control you specify inside the HierarchicalDataTemplate will function as its Header. So, basically you are specifying that the Items in your TreeView are TreeViewItems with TreeViewItems as their headers! Instead try this:</p> <pre><code> &lt;HierarchicalDataTemplate ItemsSource="{Binding Items}"&gt; &lt;Label Content="{Binding}"/&gt; &lt;HierarchicalDataTemplate.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding Path= Item.SomeData}"/&gt; &lt;/DataTemplate&gt; &lt;/HierarchicalDataTemplate.ItemTemplate&gt; &lt;/HierarchicalDataTemplate&gt; </code></pre> <p>EDIT: I could not reproduce a DataSource that produces the properties you want to bind to, so I wrote some simple code of my own that shows how it all works. Hopefully you will be able to adapt it to your needs:</p> <pre><code>&lt;TreeView ItemsSource="{Binding}" Name="Tree"&gt; &lt;TreeView.ItemContainerStyle&gt; &lt;Style TargetType="{x:Type TreeViewItem}" &gt; &lt;Setter Property="IsSelected" Value="{Binding Mode=TwoWay, Path=IsSelected}"/&gt; &lt;/Style&gt; &lt;/TreeView.ItemContainerStyle&gt; &lt;TreeView.ItemTemplate&gt; &lt;HierarchicalDataTemplate ItemsSource="{Binding Items}"&gt; &lt;Label Content="{Binding Name}"/&gt; &lt;HierarchicalDataTemplate.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding Path= SomeData}"/&gt; &lt;/DataTemplate&gt; &lt;/HierarchicalDataTemplate.ItemTemplate&gt; &lt;/HierarchicalDataTemplate&gt; &lt;/TreeView.ItemTemplate&gt; &lt;/TreeView&gt; using System.Collections.Generic; using System.ComponentModel; using System.Windows; namespace TreeViewSpike { public partial class Window1 : Window { public Window1() { InitializeComponent(); List = new List&lt;ItemList&gt; { new ItemList { Name = "MyList", Items = new List&lt;Item&gt; {new Item("1"), new Item("2")} }, new ItemList { Name = "MySecondList", Items = new List&lt;Item&gt; {new Item("3"), new Item("4")} } }; Tree.DataContext = List; List[1].IsSelected = true; } public List&lt;ItemList&gt; List { get; set; } } public class ItemList: INotifyPropertyChanged { public string Name{ get; set;} private bool _isSelected; public bool IsSelected { get { return _isSelected; } set { _isSelected = value; if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("IsSelected")); if(_isSelected) MessageBox.Show(Name + " selected"); } } public List&lt;Item&gt; Items { get; set; } public event PropertyChangedEventHandler PropertyChanged; } public class Item { public string SomeData { get; set; } public Item(string data) { SomeData = data; } } } </code></pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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