Expanding nodes from XAML

[Jani]

How I can expand nodes from the RadTreeView using XAML?

The online manual (Expanding and collapsing nodes) describes the Property IsExpanded which is not available.
Does the RadTreeView control provides a XAML property like IsExpandedOnLoad (true: expands all levels)?

PS. based on our MVVM architecture, we can not expand the RadTreeView nodes from code behind.

Cheers,
Jani

[Bobi]

Hi Jani,

In XAML you can expand RatTreeView items by setting IsExpanded="True" in the desired RadTreeViewItem like this:

<navigation:RadTreeView    
           <navigation:RadTreeViewItem Header="test2" x:Name="test2" IsExpanded="True">
                <navigation:RadTreeViewItem Header="item3" x:Name="item3" />
                <navigation:RadTreeViewItem Header="test4" x:Name="test4" />
            </navigation:RadTreeViewItem >
</navigation:RadTreeView>

I hope this answers your question.

Regards,
Boryana
the Telerik team

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[Jani]

Hi Boryana,

I am using the ItemsSource property to bind the data to the RadTreeView. I don't have any RadTreeViewItems present, to set the IsExpanded property. The RadTreeView itself should provide such a property.

Cheers,
Jani

[Bobi]

Hi Jani,

In order to expand nodes in XAML when using ItemsSource you have to use the ItemsContainerStyle property of RadtreeView:

<Style TargetType="telerik:RadTreeViewItem" x:Key="TreeViewItemStyle">
             //Other setters
            <Setter Property="IsExpanded" Value="True"></Setter>
  </Style>

<telerik:RadTreeView
            x:Name="tree"
            ItemsSource="{Binding Root}"
             ItemContainerStyle="{StaticResource TreeViewItemStyle}" />

I hope this will solve your problem.

Regards,
Boryana
the Telerik team

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Check out the tips for optimizing your support resource searches.