Public Class Customer
   Inherits [Object]
   Private custName As String = ""
   Friend custOrders As New ArrayList()

   Public Sub New(ByVal customername As String)
      Me.custName = customername
   End Sub

   Public Property CustomerName() As String
      Get
         Return Me.custName
      End Get
      Set(ByVal Value As String)
         Me.custName = Value
      End Set
   End Property

   Public ReadOnly Property CustomerOrders() As ArrayList
      Get
         Return Me.custOrders
      End Get
   End Property
End Class


Public Class Order
   Inherits [Object]
   Private ordID As String

   Public Sub New(ByVal orderid As String)
      Me.ordID = orderid
   End Sub

   Public Property OrderID() As String
      Get
         Return Me.ordID
      End Get
      Set(ByVal Value As String)
         Me.ordID = Value
      End Set
   End Property
End Class

' Create a new ArrayList to hold the Customer objects.
Private customerArray As New ArrayList()

Private Sub FillMyTreeView()
   ' Add customers to the ArrayList of Customer objects.
   Dim x As Integer
   For x = 0 To 999
      customerArray.Add(New Customer("Customer" + x.ToString()))
   Next x

   ' Add orders to each Customer object in the ArrayList.
   Dim customer1 As Customer
   For Each customer1 In customerArray
      Dim y As Integer
      For y = 0 To 14
         customer1.CustomerOrders.Add(New Order("Order" + y.ToString()))
      Next y
   Next customer1

   ' Display a wait cursor while the TreeNodes are being created.
   Cursor.Current = New Cursor("MyWait.cur")

   ' Suppress repainting the TreeView until all the objects have been created.
   treeView1.BeginUpdate()

   ' Clear the TreeView each time the method is called.
   treeView1.Nodes.Clear()

   ' Add a root TreeNode for each Customer object in the ArrayList.
   Dim customer2 As Customer
   For Each customer2 In customerArray
      treeView1.Nodes.Add(New TreeNode(customer2.CustomerName))

      ' Add a child TreeNode for each Order object in the current Customer object.
      Dim order1 As Order
      For Each order1 In customer2.CustomerOrders
         treeView1.Nodes(customerArray.IndexOf(customer2)).Nodes.Add( _
    New TreeNode(customer2.CustomerName + "." + order1.OrderID))
      Next order1
   Next customer2

   ' Reset the cursor to the default for all controls.
   Cursor.Current = System.Windows.Forms.Cursors.Default

   ' Begin repainting the TreeView.
   treeView1.EndUpdate()
End Sub

' 导入命名空间
Imports System
Imports System.Data
Imports System.Windows.Forms
Imports System.Drawing
Imports System.Data.SqlClient

public class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1
       Application.Run(form1)
   End Sub
End Class


Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim factory, group, person As TreeNode

        ' Create some nodes.
        trvOrgChart.Nodes.Clear()
        factory = trvOrgChart.Nodes.Add("f Name", "Name", 0, 0)
        group = factory.Nodes.Add("g Dept 1", "Dept 2", 1, 1)
        person = group.Nodes.Add("p Name 1", "Name 1", 2, 2)
        person = group.Nodes.Add("p Name 2", "Name 2", 2, 2)

        group = factory.Nodes.Add("g Dep 2", "Dep 2t", 1, 1)
        person = group.Nodes.Add("p Name 1", "Name 1", 2, 2)
        person = group.Nodes.Add("p Name 2", "Name 2", 2, 2)

        factory = trvOrgChart.Nodes.Add( _
            "f Dept 3", "Dept 3", 0, 0)
        group = factory.Nodes.Add( _
            "g Name 1", "Name 1", 1, 1)
        person = group.Nodes.Add( _
            "p Name 2", "Name 2", 2, 2)
        person = group.Nodes.Add( _
            "p Name 3", "Namr 3", 2, 2)

        group = factory.Nodes.Add( _
            "g Dep 5", "Dep 5", 1, 1)
        person = group.Nodes.Add( _
            "p Name 1", "Name 1", 2, 2)
        person = group.Nodes.Add( _
            "p Name 2", "Namr 2", 2, 2)
        person = group.Nodes.Add( _
            "p Name 3", "Name 3", 2, 2)

        group = factory.Nodes.Add( _
            "g Dept 10", "Dept 10", 1, 1)
        person = group.Nodes.Add( _
            "p Name 1", "Namr 1", 2, 2)
        person = group.Nodes.Add( _
            "p Namr 2", "Name 2", 2, 2)

        trvOrgChart.ExpandAll()
        trvOrgChart.Nodes(0).EnsureVisible()
    End Sub

    Private Sub trvOrgChart_BeforeLabelEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.NodeLabelEditEventArgs) Handles trvOrgChart.BeforeLabelEdit
        e.CancelEdit = (e.Node.FullPath.IndexOf(trvOrgChart.PathSeparator) = -1)
    End Sub
End Class



<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

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

    '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()
        Dim TreeNode1 As System.Windows.Forms.TreeNode = New System.Windows.Forms.TreeNode("Cameron, Charlie", 2, 5)
        Dim TreeNode2 As System.Windows.Forms.TreeNode = New System.Windows.Forms.TreeNode("Davos, Debbie", 2, 5)
        Dim TreeNode3 As System.Windows.Forms.TreeNode = New System.Windows.Forms.TreeNode("Engineering", 1, 4, New System.Windows.Forms.TreeNode() {TreeNode1, TreeNode2})
        Dim TreeNode4 As System.Windows.Forms.TreeNode = New System.Windows.Forms.TreeNode("Test", 1, 4)
        Dim TreeNode5 As System.Windows.Forms.TreeNode = New System.Windows.Forms.TreeNode("R & D", 0, 3, New System.Windows.Forms.TreeNode() {TreeNode3, TreeNode4})
        Me.trvOrgChart = New System.Windows.Forms.TreeView
        Me.SuspendLayout()
        '
        'trvOrgChart
        '
        Me.trvOrgChart.Dock = System.Windows.Forms.DockStyle.Fill
        Me.trvOrgChart.ImageIndex = 0
        Me.trvOrgChart.LabelEdit = True
        Me.trvOrgChart.Location = New System.Drawing.Point(0, 0)
        Me.trvOrgChart.Name = "trvOrgChart"
        TreeNode1.Name = "Node6"
        TreeNode1.SelectedImageIndex = 5
        TreeNode1.Text = "Cameron, Charlie"
        TreeNode2.Name = "Node7"
        TreeNode2.SelectedImageIndex = 5
        TreeNode2.Text = "Davos, Debbie"
        TreeNode3.ImageIndex = 1
        TreeNode3.Name = "Node5"
        TreeNode3.SelectedImageIndex = 4
        TreeNode3.Text = "Engineering"
        TreeNode4.ImageIndex = 1
        TreeNode4.Name = "Node8"
        TreeNode4.SelectedImageIndex = 4
        TreeNode4.Text = "Test"
        TreeNode5.ImageIndex = 0
        TreeNode5.Name = "Node0"
        TreeNode5.SelectedImageIndex = 3
        TreeNode5.Text = "R & D"
        Me.trvOrgChart.Nodes.AddRange(New System.Windows.Forms.TreeNode() {TreeNode5})
        Me.trvOrgChart.SelectedImageIndex = 0
        Me.trvOrgChart.Size = New System.Drawing.Size(292, 273)
        Me.trvOrgChart.TabIndex = 1
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.Add(Me.trvOrgChart)
        Me.Name = "Form1"
        Me.Text = "UseTreeView"
        Me.ResumeLayout(False)

    End Sub

    Friend WithEvents trvOrgChart As System.Windows.Forms.TreeView

End Class