or
<UserControl x:Class="PrimeTime.Views.Employees.EmployeeWorkdayErrorSelectionView" xmlns:scm="clr-namespace:System.ComponentModel;assembly=WindowsBase" xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation" xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity" mc:Ignorable="d" Height="504" Width="400"> <UserControl.Resources> <ResourceDictionary> <DataTemplate x:Key="ErrorWorkdaysTemplate"> <telerik:RadGridView ItemsSource="{Binding WorkdayErrors}" EnableRowVirtualization="False" IsReadOnly="True" SelectionMode="Single" AutoGenerateColumns="False" ShowGroupPanel="False" ShowColumnHeaders="False" ScrollViewer.HorizontalScrollBarVisibility="Disabled" CanUserInsertRows="False" CanUserDeleteRows="False" CanUserSortColumns="False" IsSynchronizedWithCurrentItem="True" IsFilteringAllowed="False" SelectedItem="{Binding SelectedWorkdayError, Mode=TwoWay}"> <telerik:RadGridView.Columns> <telerik:GridViewDataColumn DataMemberBinding="{Binding WorkdayDate}" Header="Day" Width="70"/> <telerik:GridViewDataColumn DataMemberBinding="{Binding ErrorMessage}" Header="Error" Width="Auto"/> </telerik:RadGridView.Columns> </telerik:RadGridView> </DataTemplate> </ResourceDictionary> </UserControl.Resources> <telerik:RadTreeListView x:Name="tlv_EmployeeSelection" EnableRowVirtualization="False" ItemsSource="{Binding Childs}" AutoGenerateColumns="False" AutoExpandItems="True" IsReadOnly="True" RowDetailsVisibilityMode="VisibleWhenSelected" SelectionMode="Single" IsFilteringAllowed="False" CanUserDeleteRows="False" CanUserInsertRows="False" RowDetailsTemplate="{StaticResource ErrorWorkdaysTemplate}" SelectedItem="{Binding SelectedItem, Mode=TwoWay}"> <telerik:RadTreeListView.ChildTableDefinitions> <telerik:TreeListViewTableDefinition ItemsSource="{Binding Childs}"/> </telerik:RadTreeListView.ChildTableDefinitions> <telerik:RadTreeListView.Columns> <telerik:GridViewDataColumn UniqueName="Name" DataMemberBinding="{Binding Name}" Header="Name" Width="*"/> <telerik:GridViewDataColumn DataMemberBinding="{Binding PersonnelNumber}" Header="Number" Width="70"/> </telerik:RadTreeListView.Columns> </telerik:RadTreeListView></UserControl>