tvscanform.vb

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Option Strict On
Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
        MyBase.New()

        'This call is required by the Windows Form Designer.
        InitializeComponent()

        'Add any initialization after the InitializeComponent() call

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (components Is Nothing) Then
                components.Dispose()
            End If
        End If
        MyBase.Dispose(disposing)
    End Sub
    Friend WithEvents ListBox1 As System.Windows.Forms.ListBox
    Friend WithEvents bttnScan As System.Windows.Forms.Button
    Friend WithEvents GlobeTree As System.Windows.Forms.TreeView

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.Container

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.bttnScan = New System.Windows.Forms.Button()
        Me.ListBox1 = New System.Windows.Forms.ListBox()
        Me.GlobeTree = New System.Windows.Forms.TreeView()
        Me.SuspendLayout()
        '
        'bttnScan
        '
        Me.bttnScan.Font = New System.Drawing.Font("Verdana", 12.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(161, Byte))
        Me.bttnScan.Location = New System.Drawing.Point(8, 218)
        Me.bttnScan.Name = "bttnScan"
        Me.bttnScan.Size = New System.Drawing.Size(328, 32)
        Me.bttnScan.TabIndex = 2
        Me.bttnScan.Text = "Scan Tree"
        '
        'ListBox1
        '
        Me.ListBox1.Font = New System.Drawing.Font("Verdana", 9.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(161, Byte))
        Me.ListBox1.ItemHeight = 14
        Me.ListBox1.Location = New System.Drawing.Point(344, 8)
        Me.ListBox1.Name = "ListBox1"
        Me.ListBox1.Size = New System.Drawing.Size(272, 242)
        Me.ListBox1.TabIndex = 1
        '
        'GlobeTree
        '
        Me.GlobeTree.Font = New System.Drawing.Font("Verdana", 9.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(161, Byte))
        Me.GlobeTree.ImageIndex = -1
        Me.GlobeTree.Location = New System.Drawing.Point(8, 8)
        Me.GlobeTree.Name = "GlobeTree"
        Me.GlobeTree.SelectedImageIndex = -1
        Me.GlobeTree.Size = New System.Drawing.Size(328, 208)
        Me.GlobeTree.TabIndex = 0
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(624, 253)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.bttnScan, Me.ListBox1, Me.GlobeTree})
        Me.Name = "Form1"
        Me.Text = "TreeView Recursive Scan"
        Me.ResumeLayout(False)

    End Sub

#End Region

    ' In the form's Load event handler we add a number of nodes to the control
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim ContinentNode As TreeNode
        Dim CountryNode As TreeNode
        GlobeTree.Nodes.Add("GLOBE")
        ContinentNode = GlobeTree.Nodes(0).Nodes.Add("Europe")
        CountryNode = ContinentNode.Nodes.Add("Germany")
        CountryNode.Nodes.Add("Berlin")
        CountryNode.Nodes.Add("Munich")
        CountryNode.Nodes.Add("Bayreuth")
        CountryNode.Nodes.Add("Frankfurt")
        CountryNode = ContinentNode.Nodes.Add("France")
        CountryNode.Nodes.Add("Paris")
        CountryNode.Nodes.Add("Nice")
        CountryNode.Nodes.Add("Lyon")
        CountryNode = ContinentNode.Nodes.Add("Italy")
        CountryNode.Nodes.Add("Rome")
        CountryNode.Nodes.Add("Venice")
        CountryNode.Nodes.Add("Napoli")
        CountryNode.Nodes.Add("Florence")
        CountryNode.Nodes.Add("Milan")
        CountryNode = ContinentNode.Nodes.Add("Spain")
        CountryNode.Nodes.Add("Madrid")
        CountryNode.Nodes.Add("Barcelona")
        CountryNode.Nodes.Add("Malaga")
        ContinentNode = GlobeTree.Nodes(0).Nodes.Add("Asia")
        CountryNode = ContinentNode.Nodes.Add("China")
        CountryNode.Nodes.Add("Bejing")
        CountryNode.Nodes.Add("Nanjing")
        CountryNode.Nodes.Add("Hong Kong")
        CountryNode = ContinentNode.Nodes.Add("Japan")
        CountryNode.Nodes.Add("Tokyo")
        CountryNode.Nodes.Add("Osaka")
        CountryNode.Nodes.Add("Kobe")
        CountryNode.Nodes.Add("Kyotto")
        CountryNode.Nodes.Add("Sapporo")
        ContinentNode = GlobeTree.Nodes(0).Nodes.Add("Africa")
        CountryNode = ContinentNode.Nodes.Add("Egypt")
        CountryNode.Nodes.Add("Cairo")
        CountryNode.Nodes.Add("Alexandria")
        CountryNode = ContinentNode.Nodes.Add("Libya")
        CountryNode.Nodes.Add("Tripoli")
        CountryNode = ContinentNode.Nodes.Add("South Africa")
        CountryNode.Nodes.Add("Johannesburg")
        CountryNode.Nodes.Add("Pretoria")
        CountryNode = ContinentNode.Nodes.Add("Zimbabwe")
        CountryNode.Nodes.Add("Harare")
        ContinentNode = GlobeTree.Nodes(0).Nodes.Add("Oceania")
        CountryNode = ContinentNode.Nodes.Add("Australia")
        CountryNode.Nodes.Add("Sidney")
        CountryNode.Nodes.Add("Melbourne")
        CountryNode.Nodes.Add("Adelaida")
        CountryNode.Nodes.Add("Brisbane")
        CountryNode.Nodes.Add("Canberra")
        CountryNode = ContinentNode.Nodes.Add("New Zealand")
        CountryNode.Nodes.Add("Wanaka")
        ContinentNode = GlobeTree.Nodes(0).Nodes.Add("N. America")
        CountryNode = ContinentNode.Nodes.Add("USA")
        CountryNode.Nodes.Add("New York")
        CountryNode.Nodes.Add("Las Vegas")
        CountryNode.Nodes.Add("Chicago")
        CountryNode.Nodes.Add("Washington")
        CountryNode.Nodes.Add("Durham")
        CountryNode.Nodes.Add("San Francisco")
        CountryNode = ContinentNode.Nodes.Add("Canada")
        CountryNode.Nodes.Add("Toronto")
        CountryNode.Nodes.Add("Vancouver")
        CountryNode.Nodes.Add("Montreal")
        CountryNode.Nodes.Add("Halifax")
        CountryNode.Nodes.Add("Calgary")
        CountryNode = ContinentNode.Nodes.Add("Mexico")
        CountryNode.Nodes.Add("Mexico City")
        ContinentNode = GlobeTree.Nodes(0).Nodes.Add("S. America")
        CountryNode = ContinentNode.Nodes.Add("Argentina")
        CountryNode.Nodes.Add("Buenos Aires")
        CountryNode = ContinentNode.Nodes.Add("Peru")
        CountryNode.Nodes.Add("Lima")
        CountryNode = ContinentNode.Nodes.Add("Colombia")
        CountryNode.Nodes.Add("Bogota")
    End Sub

    Private Sub bttnScan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bttnScan.Click
        ScanNode(GlobeTree.Nodes(0))
    End Sub

    Sub ScanNode(ByVal node As TreeNode)
        Dim thisNode As TreeNode
        Static IndentLevel As Integer
        Application.DoEvents()
        ListBox1.Items.Add(Space(IndentLevel) & node.Text)
        If node.Nodes.Count > 0 Then
            IndentLevel += 5
            For Each thisNode In node.Nodes
                ScanNode(thisNode)
            Next
            IndentLevel -= 5
        End If
    End Sub


End Class