How to incorporate Expand and Collapse for RadTreeView implemented in codebehind using CategoryViewModel sample

[jyostna]

I have used the provided CategoryViewModel to implement RadTreeView tristate logic with checkboxes and also Enable/disable of some items by using isChecked and isEnabled properties.

Now  i need to implement Expand and Collapse when i check a parent item (subcategory item )

Could you pls suggest which events and how to use.

[jyostna]

Found it

 

<Style TargetType="{x:Type telerik:RadTreeViewItem}"  BasedOn="{StaticResource RadTreeViewItemStyle}">
    <Setter Property="IsSelected" Value="{Binding Path=IsSelected,Mode=TwoWay}"  />
    <Setter Property="IsExpanded" Value="{Binding Path=IsExpanded,Mode=TwoWay}"/>
</Style>

[jyostna]

<Style TargetType="{x:Type telerik:RadTreeViewItem}"  BasedOn="{StaticResource RadTreeViewItemStyle}">
    <Setter Property="IsSelected" Value="{Binding Path=IsSelected,Mode=TwoWay}"  />
    <Setter Property="IsExpanded" Value="{Binding Path=IsExpanded,Mode=TwoWay}"/>
</Style>

[Martin Ivanov]

Thanks for sharing the solution.