Hi,

I have been successfully using the Syncfusion Treeview control with my business object but recently decided to move over to the xamDataTree.  The problem is, when I bind my business object to this new control I only see the root 'department' values... no subdepartments are displayed.

My 'Department' class is recursive for sub-departments and sub-sub-departments etc.  A sample of the class is as follows:

'========================
' Collection of Departments
'========================
Public Class DepartmentList
    Inherits ObservableCollection(Of Department)

    '
    ' other class level code...
    '
End Class

'========================
' Department
'========================
Public Class Department
    Inherits NotifyPropertyChanged

    ' Properties
    Private _ID As Integer
    Private _parentID As Integer
    Private _name As String
    Private _subDepts As DepartmentList
    Private _isSelected As Boolean = False

#End Region

#Region "Properties"

    Public Property ID() As Integer
        Get
            Return _ID
        End Get
        Set(ByVal value As Integer)
            _ID = value
            OnPropertyChanged(New PropertyChangedEventArgs("ID"))
            '_isChanged = True
        End Set
    End Property

    Public Property ParentID() As Integer
        Get
            Return _parentID
        End Get
        Set(ByVal value As Integer)
            _parentID = value
            OnPropertyChanged(New PropertyChangedEventArgs("ParentID"))
            '_isChanged = True
        End Set
    End Property

    Public Property Name() As String
        Get
            Return _name
        End Get
        Set(ByVal value As String)
            _name = value
            OnPropertyChanged(New PropertyChangedEventArgs("Name"))
            '_isChanged = True
        End Set
    End Property

    Public Property SubDepartments() As DepartmentList
        Get
            Return _subDepts
        End Get
        Set(ByVal value As DepartmentList)
            _subDepts = value
            OnPropertyChanged(New PropertyChangedEventArgs("SubDepartments"))
        End Set
    End Property

    Public Overrides Function ToString() As String
        Return _name
    End Function
#End Region

End Class

'========================
' Notification Class
'========================
''' </summary>
Public Class NotifyPropertyChanged
    Implements INotifyPropertyChanged

    Private _isChanged As Boolean

#Region "Implementations"
    Public Event PropertyChanged As PropertyChangedEventHandler Implements INotifyPropertyChanged.PropertyChanged

    Public Sub OnPropertyChanged(ByVal e As PropertyChangedEventArgs, Optional ByVal IgnoreChangedFlag As Boolean = False)
        If Not PropertyChangedEvent Is Nothing Then
            RaiseEvent PropertyChanged(Me, e)
            If Not IgnoreChangedFlag Then _isChanged = True
        End If
    End Sub
#End Region

    Public Property IsChanged() As Boolean
        Get
            Return _isChanged
        End Get
        Set(ByVal value As Boolean)
            _isChanged = value
        End Set
    End Property
End Class

The code for binding is as follows:

Private WithEvents oDepartments As New DepartmentList
 '
' Departments
oDepartments = New DepartmentList
oDepartments.Add(New Department(1, 0, "Department A"))
oDepartments.Add(New Department(2, 0, "Department B"))
oDepartments.Add(New Department(3, 0, "Department C"))
'
' Sub-Departments
oDepartments(0).SubDepartments.Add(New Department(4, 1, "Sub-department 1"))
oDepartments(0).SubDepartments.Add(New Department(5, 1, "Sub-department 2"))
oDepartments(0).SubDepartments.Add(New Department(6, 1, "Sub-department 3"))
'
' Sub-Sub-Departments
oDepartments(0).SubDepartments.Item(2).SubDepartments.Add(New Department(7, 6, "SUB-Sub-dept 3A."))
oDepartments(0).SubDepartments.Item(2).SubDepartments.Add(New Department(8, 6, "SUB-Sub-dept 3B."))
 '
treView.ItemsSource = oDepartments
 

I have tried various 'GlobalNodeLayouts' settings for the xamDataTree but to no avail; I still only see the base department level.  Please help.