Hi everybody,

I want to customize group header appearance defining a GroupConfiguration item  in window resource and passing this item to "OrderID" column on OnApplyTemplate method . To do this I wrote this XAML:

<Window>

<Window.Resources>

<!--DataGridCollectionViewSource-->

  <xceed:DataGridCollectionViewSource x:Key="cvs_orders"

    Source="{Binding Source={x:Static Application.Current}, Path=Orders}" />

<!-- GroupConfiguration -->

  <xceed:GroupConfiguration x:Key="orderIDGroupConfiguration"

    UseDefaultHeadersFooters="False">

    <xceed:GroupConfiguration.Headers>

      <xceed:GroupHeaderFooterItemTemplate VisibleWhenCollapsed="True">

        <DataTemplate>

          <xceed:GroupHeaderControl>

            <xceed:GroupHeaderControl.Resources>

              <DataTemplate DataType="{x:Type xceed:Group}">

                <StackPanel Orientation="Horizontal">

                  <TextBlock Text="TEXT" Background="Yellow" />

                </StackPanel>

              </DataTemplate>

            </xceed:GroupHeaderControl.Resources>

          </xceed:GroupHeaderControl>

        </DataTemplate>

      </xceed:GroupHeaderFooterItemTemplate>

    </xceed:GroupConfiguration.Headers>

  </xceed:GroupConfiguration>

</Window.Resources>

<!-Xceed DataGrid Instance -->

  <xceed:DataGridControl x:Name="OrdersGrid"  mItemsSource="{Binding Source={StaticResource cvs_orders}}">

</xceed:DataGridControl>

</Window>

 And in code behind a managed the OnApplyTemplate this way:

public override void OnApplyTemplate()

{

  base.OnApplyTemplate();

  this.OrdersGrid.Columns["OrderID"].GroupConfiguration =

           FindResource( "orderIDGroupConfiguration" ) as GroupConfiguration;

}

Running this code, ONLY the first group header contains the yellow textblock with "TEST" text inside, but all the other group headers use the default template.

If I move the Groupconfiguration Item from resources to <window> main tag and directly initialize the GroupConfiguration item of OrderId column, all works perfectly...

The problem is that I need to put groupconfigurations outside the main tag....

Please help me sson because i'm blocked here from two days.....