Expanding node differs from selected node

[Casper Rafn]

Hi all,
I am trying to implement MVVM, and are having issues with moving LoadOnDemand to my ViewModel using triggers and RelayCommands, I have the event firing and all,
but as it turns out it is possible to expand a node without having it selected, thus breaking the pattern, since the onLoad animation will continue to spin.

If I instead do this:

private void HierarchyTreeControl_LoadOnDemand(object sender, Telerik.Windows.RadRoutedEventArgs e){ 
RadTreeViewItem clickedItem = null; 
clickedItem = e.OriginalSource as  RadTreeViewItem;

if (clickedItem != null)  { 
...do load logic


  in the code behind file I have access to the expanding item (clickedItem). What am I missing?

[Petar Mladenov]

Hello Casper Rafn,

Could you try setting  clickedItem.IsLoadingOnDemad = false after the "load" logic and let us know if it helps you? You can also send us more of your code so that we would be better able to get quickly into the problem.

All the best,
Petar Mladenov
the Telerik team

[yjh]

I think RadTreeView had better provide  a LoadingOnDemandItem property which indicate a RadTreeViewItem is in loading on demand state to bind to, Using mvvmlight's eventtocommand behavior is not a good choice, because viewmodel should not know RadTreeViewItem, just the it's datacontext ,a dataitem.

[Petar Mladenov]

Hello Yjh,

Thank you for your suggestion. We'll consider implementing it in the future.

Greetings,
Petar Mladenov
the Telerik team