Extremely slow performance on hierarchical grid

[Martin]

Hello,

I have a three-orderhierarchical grid. The first order contains 4 entries. The first entry contains 6 other entries and one of this 6 entries contains about 150 entries.
The first and second order are extremly fast (clicking on "+"). When I click on plus on the third order I have to wait up to 10 seconds to display. Also scrolling is extremely slow.
What can I do to speed the things up? The "Hierarchy" is done by using lists like that
class Firstorder contains Name, List<Secondorder>
class Secondorder contains Name, list <Thirdorder>
class Thirdorder contains items

My XAML-code

<telerik:RadGridView AutoGenerateColumns="False" Name="gridView" Grid.Row="1" Height="329" HorizontalAlignment="Left" Margin="0,14,0,0" VerticalAlignment="Top" Width="779" >
            <telerik:RadGridView.ChildTableDefinitions>
                <telerik:GridViewTableDefinition />
            </telerik:RadGridView.ChildTableDefinitions>
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn DataMemberBinding="{Binding A}" Header="A" />
            </telerik:RadGridView.Columns>
            <telerik:RadGridView.HierarchyChildTemplate>
                <DataTemplate>
                    <telerik:RadGridView x:Name="RadGridView1" CanUserFreezeColumns="False" AutoGenerateColumns="False" ItemsSource="{Binding ElementList}"  ShowGroupPanel="False" IsReadOnly="True" SelectionChanged="RadGridView1_SelectionChanged">
                        <telerik:RadGridView.ChildTableDefinitions>
                            <telerik:GridViewTableDefinition />
                        </telerik:RadGridView.ChildTableDefinitions>
                        <telerik:RadGridView.Columns>
                            <telerik:GridViewDataColumn DataMemberBinding="{Binding B}" Header="B" />
                        </telerik:RadGridView.Columns>
                        <telerik:RadGridView.HierarchyChildTemplate>
                            <DataTemplate>
                                <telerik:RadGridView x:Name="RadGridView1" CanUserFreezeColumns="False" AutoGenerateColumns="False" ItemsSource="{Binding Data}"  ShowGroupPanel="False" IsReadOnly="True">
                                    <telerik:RadGridView.Columns>
                                        <telerik:GridViewDataColumn DataMemberBinding="{Binding C}" />
                                        <telerik:GridViewDataColumn DataMemberBinding="{Binding D}" />
                                        <telerik:GridViewDataColumn DataMemberBinding="{Binding E}" />
                                        <telerik:GridViewDataColumn DataMemberBinding="{Binding F}" />
                                                                   </telerik:RadGridView.Columns>
                                </telerik:RadGridView>
                            </DataTemplate>
                        </telerik:RadGridView.HierarchyChildTemplate>
                    </telerik:RadGridView>
                </DataTemplate>
            </telerik:RadGridView.HierarchyChildTemplate>

        </telerik:RadGridView>

[Maya]

Hello Martin,

Can you share which version of RadGridView are you working with - our current official one - Q2 2011 ? Generally, we have introduced some major changes in it that improve the performance significantly. If you are using an older version, may you try with the current one ?
 

Best wishes,
Maya
the Telerik team