[Solved] RadTreeListView: AutoExpandItems is getting ignored

[caleb]

Hello there,

I've got version 2016.2.613.1050 of the Telerik Silverlight controls.  I've got a RadTreeListView

<telerik:RadTreeListView
    x:Name="GridView"
    DataLoadMode="Asynchronous"
    IsExpandableBinding="{Binding IsFolder}"
    AutoExpandItems="False"
    AutoExpandGroups="False"
    AutoLoadHierarchy="False"
    RowIsExpandedChanged="GridView_OnRowIsExpandedChanged"
    BorderThickness="0"
    VerticalAlignment="Top"
    ScrollViewer.VerticalScrollBarVisibility="Visible"
    ScrollViewer.HorizontalScrollBarVisibility="Disabled"
    Sorted="GridView_OnSorted"
    Width="{Binding Source={StaticResource VAR}, Path=ViewAreaWidthInside}"
    Height="{Binding Source={StaticResource VAR}, Path=ViewAreaHeightWithOffset}"
    CanUserFreezeColumns="False"
    IsReadOnly="False"
    RowIndicatorVisibility="Collapsed"
    Background="{Binding Source={StaticResource VAR-New},Path=VAR}"
    VirtualizingStackPanel.VirtualizationMode="Recycling"
    AutoGenerateColumns="False"
    engine:TreeViewDragDropBehavior.IsEnabled="True"
    IsDragDropEnabled="True"
    IsDragTooltipEnabled="False"
    CanUserDeleteRows="False"
    DragCueItemTemplate="{StaticResource FirstColumnCellTemplate}"
    Style="{StaticResource RadTreeListViewStyle1}"
    CellEditEnded="GridView_OnCellEditEnded"
    EnableColumnVirtualization="True"
    EnableRowVirtualization="True"
    MouseRightButtonDown="GridView_OnMouseRightButtonDown"
    Loaded="GridView_OnLoaded"
    Unloaded="GridView_OnUnLoaded"
>
<telerik:RadTreeListView.ChildTableDefinitions>
    <telerik:TreeListViewTableDefinition
    ItemsSource="{Binding Items}"
/>
</telerik:RadTreeListView.ChildTableDefinitions>
</telerik:RadTreeListView>

So I would assume that the expander rows would not auto expand.  However when I run this code that's exactly what happens.  The auto expanders appear to be ignoring the false property and expanding. 

How do I get this to work?  What I want to happen is each expander row to stay closed and expand as the user selects them.  I reviewed the .xaml.cs and there's no code there that is setting the expander property.

Cheers,

 

Caleb

[Dilyan Traykov]

Hello,

I tried to reproduce the behavior you've described in a sample project, but was, unfortunately, unable to do so. Could you please have a look at the attached project and let me know if I've missed something of importance?

It would really be of help if you could also provide the code-behind where you've handled RadTreeListView's events.

Thank you in advance for your cooperation on the matter. I will be awaiting your reply.

Regards,
Dilyan Traykov
Telerik by Progress

[caleb]

Hello there,

 

I'm not able to get the supplied bit of code to compile.  VS 2012 can't seem to resolve the Telerik bits.  Anyways.  I'm not sure this is a good example.  The issue that I have is that I have a collection of data each piece of data is either a folder or a file.  The folders might have children, the files certainly don't.  I don't see how that is modeled in the .xaml that you sent me.  Can you modify your example to work with the above scenario?

Thanks,

Caleb

[caleb]

Mate!

 

I had an attached behavior that was causing this problem.  The OnLoaded method was calling ExpandAllHierarchyItems();

 

Thanks,

 

Caleb