vb.net操作TreeView控件，生成树节点的实例代码，其中遍历采用递归方法。

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Public Class Form2
    Class nn
        Public name As String
        Public parent As String
        Public snumber As String
    End Class

    Private Sub Form2_Load(ByVal sender As Object,ByVal e As System.EventArgs) Handles Me.Load
        Dim nd(10) As nn
        Dim i As Integer
        For i = 0 To 8
            nd(i) = New nn
        Next
        nd(0).name = "root" : nd(0).parent = "0" : nd(0).snumber = "1"
        nd(1).name = "aaa" : nd(1).parent = "1" : nd(1).snumber = "2"
        nd(2).name = "bbb" : nd(2).parent = "1" : nd(2).snumber = "3"
        nd(3).name = "ccc" : nd(3).parent = "2" : nd(3).snumber = "4"
        nd(4).name = "ddd" : nd(4).parent = "3" : nd(4).snumber = "5"
        nd(5).name = "eee" : nd(5).parent = "2" : nd(5).snumber = "6"
        nd(6).name = "fff" : nd(6).parent = "2" : nd(6).snumber = "7"
        nd(7).name = "ggg" : nd(7).parent = "5" : nd(7).snumber = "8"

        Me.TreeView1.Nodes.Clear()
       
        For i = 0 To 7
            addto(nd(i),TreeView1.Nodes)
        Next
    End Sub
    Public Sub addto(ByVal nd As nn,ByVal nodes As TreeNodeCollection)
        Dim dd As TreeNode
        Dim tmpd As TreeNode
        If nd.parent = "0" Then
            tmpd = nodes.Add(nd.name)
            tmpd.ToolTipText = nd.snumber
            Exit Sub
        Else
            For Each dd In nodes
                If nd.parent = dd.ToolTipText Then
                    tmpd = dd.Nodes.Add(nd.name)
                    tmpd.ToolTipText = nd.snumber
                    Exit Sub
                End If
                addto(nd,dd.Nodes)
            Next
        End If
    End Sub
End Class

代码仅供参考，实际应用可灵活变更。