Databinding Problem in a ListView

Question

Hi,

I have a problem when binding data in a ListView.
The list view contains several columns, one column contains a
textbox. The user should be able to change the height for each item
in the listview via the text in this textbox.

Here is the code:

      <DockPanel>
        <ListView x:Name="myListView" ItemsSource="{Binding .}">
            <ListView.ItemContainerStyle>
                <Style TargetType="ListViewItem">
                    <Setter Property="Height" Value="{Binding ElementName=heightTextBox, Path=Text, Converter={StaticResource myConverter}}" />
                </Style>
            </ListView.ItemContainerStyle>
            <ListView.View>
                <GridView>
                    <GridViewColumn Header="Text">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock Text="Test text" />
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>      
                    <GridViewColumn Header="Height">
                        <GridViewColumn.CellTemplate>
                            <DataTemplate>
                                <TextBox x:Name="heightTextbox" Text="30" />
                            </DataTemplate>
                        </GridViewColumn.CellTemplate>
                    </GridViewColumn>
                </GridView>
            </ListView.View>
        </ListView>
    </DockPanel>

This example does not work, since the application fails to find the element 'heightTextbox'.
If the textbox is outside the listview everything works as intended.

How can I access the 'heightTextbox' in the ListView.ItemContainerStyle ?
I appreciate any help.

Regards,
Simon