How to keep certain node collapsed?

[Manoj]

I am using TreeListView to show my data in hierarchical order. Here is simplified view of my xaml.

<RadTreeListView>
  <RadTreeListView.ChildTableDefinitions>
     <TreeListViewTableDefinition  ItemsSource="{Binding PropertiesList, Mode=OneWay}"  />
  </RadTreeListView.ChildTableDefinitions>
  <RadTreeListView.Columns>
      <GridViewColumn>
          <GridViewColumn.CellTemplate>
            <!-- My control to be shown in read only mode -->
          </GridViewColumn.CellTemplate>
          <GridViewColumn.CellEditTemplate>
            <!-- My control to be shown in Edit mode -->
          </GridViewColumn.CellEditTemplate>
      </GridViewColumn>
  </RadTreeListView.Columns>
</RadTreeListView>

So far everything works fine. Data is being shown properly. Only the issue is when data is shown my tree has data in following format.
- section 1
  - item 1 in section 1
  - item 2 in section 1
  and so on items .....................
- section 2
  - item 1 in section 2
  - item 2 in section 2
  and so on items .....................
and so on sections........................

These section are created programmatically. Once my data is loaded, I want to expand all sections except a particular one. The methods that can be called on TreeListView after data load are ExpandAllHierarchyItems() OR CollapseAllHierarchyItems(). But this is not what I need. How can I set a particular section to be collapsed in this case?

I saw a method CollapseHierarchyItem() but I could not find the way to access that particular HierarchyItem and call this method on it. Could you please help out me with this issue?

[Vlad]

Hello,

 You can iterate Items collection of the treelist to achieve your goal. 

Kind regards,
Vlad
the Telerik team

[Manoj]

Hi Vlad,

Thanks for your reply. Could you please provide more details, which event should be used in this case to iterate and some sample code for it?

Thanks,
Manoj Attal