Nested ListViews

Hello all,

My company is currently researching .NET 3.0 using WPF as a potential platform for our MES solution. We have already implemented it in a browser-based interface, but we're finding that the latency and maintenance issues are becoming bigger problems than we originally anticipated - so we're now looking into a smart client as a solution.

Things are looking good so far, but I've run into a little snag. I'm trying to display some hierarchical data (routing/bom information) using nested listviews, which I was able to get to work, but only the first time. E.g., I set the DataContext to one production order object, and it works, but when I set the DataContext to a new order object the top-level listview is updated, but the nested listviews don't get displayed.

Here's the XAML code in question:

            <ListView x:Name="operationsListView" ItemsSource="{Binding Path=Operations}">
                          <ListView.Template>
                            <ControlTemplate TargetType="ListView">
                              <ItemsPresenter />
                            </ControlTemplate>
                          </ListView.Template>
                          <ListView.ItemContainerStyle>
                            <Style TargetType="{x:Type ListViewItem}">
                              <Setter Property="Template">
                                <Setter.Value>
                                  <ControlTemplate TargetType="{x:Type ListViewItem}">
                                    <Border BorderThickness="0,0,0,1" BorderBrush="Black">
                                      <StackPanel>
                                        <GridViewRowPresenter />
                                        <ListView ItemsSource="{Binding Path=BillOfMaterials}" HorizontalAlignment="Center" Style="{StaticResource HiddenEmptyListViewStyle}" ItemContainerStyleSelector="{StaticResource AlternatingBackgroundListViewItemStyleSelector}">
                                          <ListView.View>
                                            <GridView ColumnHeaderContainerStyle="{StaticResource HiddenColumnHeaderContainerStyle}">
                                              <GridViewColumn DisplayMemberBinding="{Binding Path=Material.Number}"/>
                                              <GridViewColumn DisplayMemberBinding="{Binding Path=Material.Description, Converter={StaticResource titleCaseConverter}}"/>
                                              <GridViewColumn DisplayMemberBinding="{Binding Path=Quantity}"/>
                                              <GridViewColumn DisplayMemberBinding="{Binding Path=UnitOfMeasure, Converter={StaticResource unitOfMeasureConverter}}"/>
                                              <GridViewColumn>
                                                <GridViewColumn.CellTemplate>
                                                  <DataTemplate>
                                                    <Button Content="{Binding Path=Material.Drawing.Number}" Style="{StaticResource LinkButtonStyle}"/>
                                                  </DataTemplate>
                                                </GridViewColumn.CellTemplate>
                                              </GridViewColumn>
                                            </GridView>
                                          </ListView.View>
                                        </ListView>
                                      </StackPanel>
                                    </Border>
                                  </ControlTemplate>
                                </Setter.Value>
                              </Setter>
                            </Style>
                          </ListView.ItemContainerStyle>
                          <ListView.View>
                            <GridView ColumnHeaderContainerStyle="{StaticResource HiddenColumnHeaderContainerStyle}">
                              <GridViewColumn>
                                <GridViewColumn.CellTemplate>
                                  <DataTemplate>
                                    <CheckBox VerticalAlignment="Center"/>
                                  </DataTemplate>
                                </GridViewColumn.CellTemplate>
                              </GridViewColumn>
                              <GridViewColumn>
                                <GridViewColumn.CellTemplate>
                                  <DataTemplate>
                                    <TextBlock FontWeight="Bold" Text="{Binding Path=Number}"/>
                                  </DataTemplate>
                                </GridViewColumn.CellTemplate>
                              </GridViewColumn>
                              <GridViewColumn DisplayMemberBinding="{Binding Path=Description, Converter={StaticResource titleCaseConverter}}"/>
                            </GridView>
                          </ListView.View>
                        </ListView>
 

What am I doing wrong Is there a better way to do nested ListViews like this