TreeView and TreeViewItems

Question

Hi

 

how do i get to the real TreeViewItem when i use bindings?

Example:

Dim item As TreeViewItem = New TreeViewItem()
Dim dc As MenuDomainContext = New MenuDomainContext()
Dim res = dc.Load(dc.GetIPPlanMenu2ChildsQuery(DirectCast(lb.SelectedItem, IPPlanMenu2).MenuID), AddressOf PopulateMenu, item)
item.Header = DirectCast(lb.SelectedItem, IPPlanMenu2).MenuText
tvMenu.Items.Add(item)
item.ItemsSource = res.Entities

Private Sub PopulateMenu(ByVal loadOp As System.ServiceModel.DomainServices.Client.LoadOperation)
Dim item As TreeViewItem = loadOp.UserState

iterating though item.items - these seems to be of type IPPlanMenu2 eg the metaclass containing the data that was bound... i need to find the items of the treeviewitem class...?

 

Answer 1

There is a introduction on how to Iterate Through TreeViewItems for RadControls, you can refer:

http://www.telerik.com/help/silverlight/radtreeview-how-to-iterate-through-treeviewitems.html

Answer 2

Hi.. Thanks for the sugestion, but i hvent been able to get it to work...

is there a better way of doing this - this is my senario:

Database table:
   ID : Integer
  ParentID : Integer
  Text

 

Then i have a ria service that returns the data:

GetIPPlanMenu2() As IQueryable(Of IPPlanMenu2)

 

This i want to get into treeview linked by ParentID..

Could someone construct a simple example for me, thanks.

Answer 3

Ahh - the problem is.. when the data have been loaded async and i get the event, the treeview havnt generated the treeviewitems yet...

now back to the box and think.,..

Answer 4

Ok - reverted back to basic... and it almost works...

Xaml:

<StackPanel Grid.Column="0" Orientation="Vertical" >
   <StackPanel.Resources>
      <sdk:HierarchicalDataTemplate x:Key="MenuChild" >
         <TextBlock FontStyle="Italic" Text="{Binding Path=MenuText}" />
      </sdk:HierarchicalDataTemplate>
      <sdk:HierarchicalDataTemplate x:Key="MenuParent" ItemsSource="{Binding ParentID}" ItemTemplate="{StaticResource MenuChild}">
         <TextBlock Text="{Binding Path=MenuText}" FontWeight="Bold" />
      </sdk:HierarchicalDataTemplate>
   </StackPanel.Resources>
   <sdk:TreeView Name="tvMenu" ItemTemplate="{StaticResource MenuParent}">
   </sdk:TreeView>
</StackPanel>

and from the treeview loaded event it get populated by:

Dim mdc As MenuDomainContext = New MenuDomainContext()
tvMenu.ItemsSource = mdc.IPPlanMenu2s
mdc.Load(mdc.GetIPPlanMenu2Query())

however, it loads everything into one level - i had hoped it would have been "grouped by" the ID, so how do i do that?