Imports System.Collections
Public Class MainClass
Public Shared Sub Main()
Dim rootNode, child1 As TreeNode(Of Employee)
rootNode = New TreeNode(Of Employee)(New Employee(111, "A"))
child1 = rootNode.AddChild(New Employee(222, "B"))
rootNode.AddChild(New Employee(333, "C"))
child1.AddChild(New Employee(444, "D"))
child1.AddChild(New Employee(555, "E"))
Console.WriteLine(rootNode)
End Sub
End Class
Public Class TreeNode(Of T)
Public Data As T
Private _childNodes As ArrayList
Public Sub New(ByVal nodeData As T)
Me.Data = nodeData
Me._childNodes = New ArrayList
End Sub
Public ReadOnly Property Children() As TreeNode(Of T)()
Get
Return Me._childNodes.ToArray()
End Get
End Property
Default Public ReadOnly Property Item(ByVal index As Long) As TreeNode(Of T)
Get
Return Me._childNodes(index)
End Get
End Property
Public Function AddChild(ByVal nodeData As T) As TreeNode(Of T)
Dim newNode As TreeNode(Of T) = New TreeNode(Of T)(nodeData)
Me._childNodes.Add(newNode)
Return newNode
End Function
Overrides Function ToString() As String
Return Me.Data.ToString()
End Function
End Class
Public Class Employee
Private _id As Integer
Private _name As String
Public Sub New(ByVal id As Integer, ByVal name As String)
Me._id = id
Me._name = name
End Sub
Public Overrides Function ToString() As String
Return Me._name
End Function
End Class