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Catastrophic failure in setting the itemtemplate using code behind for Treeview
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This is a migrated thread and some comments may be shown as answers.
Kartheek
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Kartheek asked on 23 Feb 2011, 02:14 AM
Hi,

I am getting Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED)) when trying to set the value for itemTemplate.

my code:
Telerik.Windows.Controls.HierarchicalDataTemplate template = (Telerik.Windows.Controls.HierarchicalDataTemplate)this.Resources["ProductTemplate"];
Telerik.Windows.Controls.HierarchicalDataTemplate template1 = (Telerik.Windows.Controls.HierarchicalDataTemplate)this.Resources["TreeTemplateLevel"];
template.ItemTemplate.SetValue(Telerik.Windows.Controls.RadTreeView.ItemTemplateProperty, template1);

XAML:
<telerik:HierarchicalDataTemplate x:Key="TreeTemplateLevel" 
ItemsSource="{Binding Path=ChildItems}">
<StackPanel Orientation="Horizontal">
<HyperlinkButton Content="{Binding Title}" NavigateUri="{Binding Path=NavigateUri}" TargetName="_blank" VerticalAlignment="Center" />
<Button Content="info"/>
</StackPanel>
</telerik:HierarchicalDataTemplate>
        <telerik:HierarchicalDataTemplate x:Key="ProductTemplate" ItemsSource="{Binding Path=ChildSPLists}" ItemTemplate="{StaticResource ProductTemplate1}">
            <StackPanel Orientation="Horizontal" >
<Image Source="/DocumentLibrarySL;component/Images/Folder.png"/>
<TextBlock Text="{Binding Title}" />
</StackPanel>
</telerik:HierarchicalDataTemplate>


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Tina Stancheva
Telerik team
answered on 28 Feb 2011, 12:43 PM
Hi Kartheek,

If you need to set the "ProductTemplate" HiearachicalDataTemplate ItemTemplate property, you can set it like so:
Telerik.Windows.Controls.HierarchicalDataTemplate template = (Telerik.Windows.Controls.HierarchicalDataTemplate)this.Resources["ProductTemplate"];
Telerik.Windows.Controls.HierarchicalDataTemplate template1 = (Telerik.Windows.Controls.HierarchicalDataTemplate)this.Resources["TreeTemplateLevel"];
template.ItemTemplate = template1;

I also noticed that you have set an ItemTemplate for the "ProductTemplate" in XAML, and therefore I was wondering whether you need to dynamically determine which ItemTemplate to use. If this is the case, then you can take advantage of the HierarchicalDataTemplate ItemTemplateSelector property.

I hope that info helps.

Best wishes,
Tina Stancheva
the Telerik team
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Kartheek
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Answers by
Tina Stancheva
Telerik team
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