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    <p>Alright, this solution works: I changed the WindowV.xaml and WindowV.xaml.cs files as follows. The following corrections fix the problem concerning namescope in xaml.</p> <p>Here's the new WindowV.xaml file:</p> <pre><code>&lt;Window x:Class="WpfApplication1.WindowV" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:src="clr-namespace:WpfApplication1" Name="RootElement" Title="WindowV" Height="300" Width="300"&gt; &lt;Window.Resources&gt; &lt;ContextMenu x:Key="myContextMenu" DataContext="{Binding Path=DataContext, ElementName=RootElement}"&gt; &lt;MenuItem Header="{Binding MenuItem1}" /&gt; &lt;MenuItem Header="{Binding MenuItem2}" /&gt; &lt;MenuItem Header="{Binding MenuItem3}" /&gt; &lt;/ContextMenu&gt; &lt;Style TargetType="{x:Type ItemsControl}"&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding IsLocked}" Value="true"&gt; &lt;Setter Property="ItemsSource" Value="{Binding LockedList}" /&gt; &lt;Setter Property="ItemTemplate"&gt; &lt;Setter.Value&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding}" /&gt; &lt;/DataTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/DataTrigger&gt; &lt;DataTrigger Binding="{Binding IsLocked}" Value="false"&gt; &lt;Setter Property="ItemsSource" Value="{Binding RegularList}" /&gt; &lt;Setter Property="ItemTemplate"&gt; &lt;Setter.Value&gt; &lt;DataTemplate&gt; &lt;TextBlock Text="{Binding}" ContextMenu="{StaticResource myContextMenu}" /&gt; &lt;/DataTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition Height="4*" /&gt; &lt;RowDefinition Height="*" /&gt; &lt;/Grid.RowDefinitions&gt; &lt;ItemsControl Grid.Row="0" /&gt; &lt;Button Name="ToggleButton" Grid.Row="1" Content="Toggle Lock" Click="OnToggleLock" /&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p>Here's the corresponding code-behind:</p> <pre><code>using System.Windows; using System.Windows.Markup; using System; namespace WpfApplication1 { /// &lt;summary&gt; /// Interaction logic for Window1.xaml /// &lt;/summary&gt; public partial class WindowV : Window { public WindowV() { InitializeComponent(); System.Windows.Controls.ContextMenu contextMenu = FindResource("myContextMenu") as System.Windows.Controls.ContextMenu; NameScope.SetNameScope(contextMenu, NameScope.GetNameScope(this as DependencyObject)); contextMenu.RegisterName("RootElement", this); } private void OnToggleLock(object sender, RoutedEventArgs e) { if (((WindowVM)(DataContext)).IsLocked == true) ((WindowVM)(DataContext)).IsLocked = false; else ((WindowVM)(DataContext)).IsLocked = true; } } } </code></pre> <p>Andrew</p>
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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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