New Treeviewitem - Fails on BeginEdit

[Paul Gallen]

Hi

given the code below is there any reason why my NewNode.Begin edit is causing an exception - object ref not set to an instance of an object. This works fine if I omit the BeginEdit

  Dim NewNode As New RadTreeViewItem

        NewNode.Header = Now

        Me.CurrentTreeViewItem.IsExpanded = True
        Me.CurrentTreeViewItem.Items.Add(NewNode)

        NewNode.IsSelected = True

        NewNode.BringIntoView()
        NewNode.BeginEdit()

 
Thanks

P

[Valentin.Stoychev]

Hi Paul Gallen,

The problem with this code is that the new item is still not generated, because of the asynchronous nature of the Silverlight layout system.

To resolve this, you need to call the BeginEdit method with Dispatcher.Invoke:
http://msdn.microsoft.com/en-us/library/cc190259(VS.95).aspx

Dispatcher.BeginInvoke(AddressOf EditNode)

Private Sub EditNode()
    NewNode.BeginEdit()
End Sub

Please let us know if you have any problems with this approach.

Best wishes,
Valentin.Stoychev
the Telerik team

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