How can I get alternating row backgrounds in the MultiColumnTreeView?

I'm using the MultiColumn TreeView and I'd like to display alternative row backgrounds to make it easier to read for users. I tried creating an ItemContainerStyle for the MulticolumnTreeViewItem that triggers when ItemsControl.AlternationIndex is 1, setting its background to a different color. However, the background is always the same color, despite the Snoop tool showing the background colors alternating correctly.

Am I doing this the right way? Can you perhaps provide a small sample that demonstrates alternating backgrounds with the treeview?

Thanks,

-Craig

Hello Craig,

The following style works for me:

<ms:MulticolumnTreeView AlternationCount="2"
                                          ItemTemplate="{ms:ChildPath Children}">
  <ms:MulticolumnTreeView.Columns>
    <GridViewColumn DisplayMemberBinding="{Binding TelNo}" Header="Tel No" />
    <GridViewColumn DisplayMemberBinding="{Binding BankBalance}" Header="Bank Balance" />
    <GridViewColumn DisplayMemberBinding="{Binding Born}" Header="Born" />
  </ms:MulticolumnTreeView.Columns>
  <ms:MulticolumnTreeView.ItemContainerStyle>
    <Style TargetType="ms:MulticolumnTreeViewItem">
      <Setter Property="Background" Value="HotPink" />
      <Style.Triggers>
        <Trigger Property="AlternationIndex" Value="1">
          <Setter Property="Background" Value="Lime" />
        </Trigger>
      </Style.Triggers>
    </Style>
  </ms:MulticolumnTreeView.ItemContainerStyle>
</ms:MulticolumnTreeView>

This produces the desired alternation effect (see attached screenshot).  However, it sounds like this is what you're already doing -- do you see something different?

I actually discovered that we had written a special ControlTemplate for MulticolumnTreeViewItem that removed its Border, which prevented the background colors from appearing. Once I fixed the template, the backgrounds worked as desired.

Thanks,

-Craig