title: DataTemplate Binding for ListBox to ViewModel property
body: <p>I'm using a ListBox with a DataTemplate.</p>
  
  <pre><code>                &lt;ListBox Grid.Row="1" Grid.ColumnSpan="3" Grid.RowSpan="3" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" 
                                  ItemsSource="{Binding Order.OrderLines}" &gt;
                  &lt;ListBox.ItemTemplate&gt;
                      &lt;DataTemplate&gt;
                          &lt;Grid&gt;
                              &lt;Grid.RowDefinitions&gt;
                                  &lt;RowDefinition /&gt;
                                  &lt;RowDefinition /&gt;
                                  &lt;RowDefinition /&gt;
                              &lt;/Grid.RowDefinitions&gt;
                              &lt;Grid.ColumnDefinitions&gt;
                                  &lt;ColumnDefinition /&gt;
                                  &lt;ColumnDefinition /&gt;
                              &lt;/Grid.ColumnDefinitions&gt;
  
                              &lt;TextBlock Grid.Column="0"&gt;Qty&lt;/TextBlock&gt;
                              &lt;TextBox Text="{Binding LineQty, Mode=TwoWay}" Grid.Column="1" /&gt;
  
                              &lt;TextBlock Grid.Row="1" Grid.Column="0"&gt;Weight&lt;/TextBlock&gt;
                              &lt;TextBox Text="{Binding Path=LineWeight}" Grid.Row="1" Grid.Column="1" /&gt;
  
                              &lt;TextBlock Grid.Column="0" Grid.Row="2"&gt;Pallet Weights&lt;/TextBlock&gt;
                              &lt;TextBox Text="{Binding PalletWeights}" Grid.Row="2" Grid.Column="1" /&gt;
                          &lt;/Grid&gt;
                      &lt;/DataTemplate&gt;
                  &lt;/ListBox.ItemTemplate&gt;
  
              &lt;/ListBox&gt;
  </code></pre>
  
  <p>The TextBox value is binding properly.  The problem is I have a property on my ViewModel called "ViewMode" which I have the IsEnabled property of the TextBox bound to an App.xaml Style DataTrigger:</p>
  
  <pre><code>            &lt;Style TargetType="{x:Type TextBox}"&gt;
              &lt;Style.Triggers&gt;
                  &lt;DataTrigger Binding="{Binding ViewMode}" Value="Add"&gt;
                      &lt;Setter Property="BorderBrush" Value="White"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="BorderThickness" Value="2,2,0,0"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="BorderBrush" Value="Black"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="BorderThickness" Value="0,0,2,2"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="Background" Value="LightBlue"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="Foreground" Value="Black"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="FontWeight" Value="Bold"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="IsEnabled" Value="true"&gt;&lt;/Setter&gt;
                  &lt;/DataTrigger&gt;
                  &lt;DataTrigger Binding="{Binding ViewMode}" Value="Edit"&gt;
                      &lt;Setter Property="BorderBrush" Value="White"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="BorderThickness" Value="2,2,0,0"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="BorderBrush" Value="Black"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="BorderThickness" Value="0,0,2,2"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="Background" Value="LightBlue"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="Foreground" Value="Black"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="FontWeight" Value="Bold"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="IsEnabled" Value="true"&gt;&lt;/Setter&gt;
                  &lt;/DataTrigger&gt;
                  &lt;DataTrigger Binding="{Binding ViewMode}" Value="View"&gt;
                      &lt;Setter Property="IsEnabled" Value="false"&gt;&lt;/Setter&gt;
                      &lt;Setter Property="Foreground" Value="Gray"&gt;&lt;/Setter&gt;
                  &lt;/DataTrigger&gt;
              &lt;/Style.Triggers&gt;
              &lt;Setter Property="Margin" Value="2" /&gt;
          &lt;/Style&gt;
  </code></pre>
  
  <p>This works for all of my other TextBoxes.  How do I get the IsEnabled property to work from within the DataTemplate? The DataContext of the ListBox is referencing the ViewModel property "Order", so I would think it should be able to see the ViewModel property "ViewMode".</p>
  
  <p>Thanks,
  -Sid.</p>