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    <pre><code>public class DataModel { private IObservableCollection&lt;short&gt; this.statusList; public IObservableCollection&lt;short&gt; StatusList { get { return this.statusList; } set { this.statusList = value; this.RaisePropertyChanged("StatusList"); } } } </code></pre> <p>now you can do this one</p> <pre><code>this.StatusList = new ObservableCollection&lt;short&gt;(); </code></pre> <p>hope this helps</p> <p><strong>EDIT</strong></p> <p>Here is an example that I am running without any problems.</p> <pre><code>&lt;Window x:Class="WpfStackOverflowSpielWiese.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfStackOverflowSpielWiese" Title="Window1" Height="300" Width="300"&gt; &lt;Window.Resources&gt; &lt;local:DataModel x:Key="myDataModel" /&gt; &lt;local:StatusConverter x:Key="StatusConverter" /&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;Grid.RowDefinitions&gt; &lt;RowDefinition Height="Auto" /&gt; &lt;RowDefinition /&gt; &lt;/Grid.RowDefinitions&gt; &lt;Button Grid.Row="0" Content="Update" Click="Button_Click" /&gt; &lt;ListView Name="ListBox" Grid.Row="1" ItemsSource="{Binding Source={StaticResource myDataModel}, Path=StatusList}" HorizontalAlignment="Left" HorizontalContentAlignment="Left" VerticalContentAlignment="Top" BorderThickness="0" Background="#000000"&gt; &lt;ListView.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;StackPanel Orientation="Horizontal"&gt;&lt;/StackPanel&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ListView.ItemsPanel&gt; &lt;ListView.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;Button MinWidth="20" MinHeight="100" Background="{Binding Converter={StaticResource StatusConverter}}" Content="{Binding}"&gt;&lt;/Button&gt; &lt;/DataTemplate&gt; &lt;/ListView.ItemTemplate&gt; &lt;/ListView&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre> <p><br/></p> <pre><code>using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.ComponentModel; using System.Globalization; using System.Windows; using System.Windows.Data; using System.Windows.Media; namespace WpfStackOverflowSpielWiese { /// &lt;summary&gt; /// Interaction logic for Window1.xaml /// &lt;/summary&gt; public partial class Window1 : Window { public Window1() { this.InitializeComponent(); } private void Button_Click(object sender, RoutedEventArgs e) { var dataModel = this.TryFindResource("myDataModel") as DataModel; if (dataModel != null) { dataModel.UpdateStatusList(new[] {(short)1, (short)2, (short)3}); } } } public class DataModel : INotifyPropertyChanged { private ObservableCollection&lt;short&gt; statusList; public DataModel() { this.StatusList = new ObservableCollection&lt;short&gt;(); this.UpdateStatusList(new[] {(short)1, (short)2, (short)3}); } public void UpdateStatusList(IEnumerable&lt;short&gt; itemsToUpdate) { foreach (var s in itemsToUpdate) { this.StatusList.Add(s); } } public ObservableCollection&lt;short&gt; StatusList { get { return this.statusList; } set { this.statusList = value; this.RaisePropertyChanged("StatusList"); } } private void RaisePropertyChanged(string propertyName) { var eh = this.PropertyChanged; if (eh != null) { eh(this, new PropertyChangedEventArgs(propertyName)); } } public event PropertyChangedEventHandler PropertyChanged; } public class StatusConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { if (value is short) { switch ((short)value) { case 1: return Brushes.Red; case 2: return Brushes.Orange; case 3: return Brushes.Green; } } return Brushes.White; } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { return DependencyProperty.UnsetValue; } } } </code></pre>
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    1. COHi punker76, thanks for your response. It did the job of updating the values. But now it throws a lot of Exceptions like this: System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=VerticalContentAlignment; DataItem=null; target element is 'ListViewItem' (Name=''); target property is 'VerticalContentAlignment' (type 'VerticalAlignment')
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    2. COI can not imagine that it has something to do with resetting the list. Is the xaml code with the ListView only an excerpt from a whole piece of code?
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    3. COYes its the only code in the XAML file, there is also no code inside the code behind file. I think it has to do with the new operator, in when its applied the source gets lost, and the exception is thrown?
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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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