VB.Net by API/System.Windows.Forms/TreeNode

TreeNode.Nodes.Add

<source lang="vbnet"> Imports System Imports System.Collections Imports System.Data Imports System.Drawing Imports System.Windows.Forms Imports System.ruponentModel Imports System.Drawing.Drawing2D Imports System.IO Public Class MainClass

   Shared Sub Main()
       Dim form1 As Form = New Form1
       Application.Run(form1)

   End Sub

End Class

Public Class Form1

   Inherits System.Windows.Forms.Form

1. 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
   "Required by the Windows Form Designer
   Private components As System.ruponentModel.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.
   Friend WithEvents treeOne As System.Windows.Forms.TreeView
   Friend WithEvents Splitter1 As System.Windows.Forms.Splitter
   Friend WithEvents treeTwo As System.Windows.Forms.TreeView
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.treeOne = New System.Windows.Forms.TreeView()
       Me.Splitter1 = New System.Windows.Forms.Splitter()
       Me.treeTwo = New System.Windows.Forms.TreeView()
       Me.SuspendLayout()
       "
       "treeOne
       "
       Me.treeOne.Dock = System.Windows.Forms.DockStyle.Left
       Me.treeOne.HideSelection = False
       Me.treeOne.ImageIndex = -1
       Me.treeOne.Location = New System.Drawing.Point(5, 5)
       Me.treeOne.Name = "treeOne"
       Me.treeOne.SelectedImageIndex = -1
       Me.treeOne.Size = New System.Drawing.Size(236, 351)
       Me.treeOne.TabIndex = 0
       "
       "Splitter1
       "
       Me.Splitter1.Location = New System.Drawing.Point(241, 5)
       Me.Splitter1.Name = "Splitter1"
       Me.Splitter1.Size = New System.Drawing.Size(3, 351)
       Me.Splitter1.TabIndex = 2
       Me.Splitter1.TabStop = False
       "
       "treeTwo
       "
       Me.treeTwo.Dock = System.Windows.Forms.DockStyle.Fill
       Me.treeTwo.HideSelection = False
       Me.treeTwo.ImageIndex = -1
       Me.treeTwo.Location = New System.Drawing.Point(244, 5)
       Me.treeTwo.Name = "treeTwo"
       Me.treeTwo.SelectedImageIndex = -1
       Me.treeTwo.Size = New System.Drawing.Size(271, 351)
       Me.treeTwo.TabIndex = 3
       "
       "TreeViewExample
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
       Me.ClientSize = New System.Drawing.Size(520, 366)
       Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.treeTwo, Me.Splitter1, Me.treeOne})
       Me.DockPadding.Bottom = 10
       Me.DockPadding.Left = 5
       Me.DockPadding.Right = 5
       Me.DockPadding.Top = 5
       Me.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
       Me.Name = "TreeViewExample"
       Me.Text = "TreeView Example"
       Me.ResumeLayout(False)
   End Sub

1. End Region

   Private Sub TreeViewExample_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
       Dim node As TreeNode
       node = treeOne.Nodes.Add("Node 1")
       node.Nodes.Add("Leap 1")
       node.Nodes.Add("Leap 2")
       node.Expand()
       node = treeTwo.Nodes.Add("Node 2")
       node.Nodes.Add("Leap 3")
       node.Nodes.Add("Leap 4")
       node.Expand()
       treeTwo.AllowDrop = True
       treeOne.AllowDrop = True
   End Sub
   Private Sub treeOne_MouseDown(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles treeOne.MouseDown, treeTwo.MouseDown
       Dim tree As TreeView = CType(sender, TreeView)
       Dim node As TreeNode
       node = tree.GetNodeAt(e.X, e.Y)
       tree.SelectedNode = node
       If Not node Is Nothing Then
           tree.DoDragDrop(node.Clone(), DragDropEffects.Copy)
       End If
   End Sub
   Private Sub treeTwo_DragOver(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles treeOne.DragOver, treeTwo.DragOver
       Dim tree As TreeView = CType(sender, TreeView)
       e.Effect = DragDropEffects.None
       If Not e.Data.GetData(GetType(TreeNode)) Is Nothing Then
           Dim pt As New Point(e.X, e.Y)
           pt = tree.PointToClient(pt)
           Dim node As TreeNode = tree.GetNodeAt(pt)
           If Not node Is Nothing Then
               e.Effect = DragDropEffects.Copy
               tree.SelectedNode = node
           End If
       End If
   End Sub
   Private Sub treeTwo_DragDrop(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DragEventArgs) Handles treeOne.DragDrop, treeTwo.DragDrop
       Dim tree As TreeView = CType(sender, TreeView)
       Dim pt As New Point(e.X, e.Y)
       pt = tree.PointToClient(pt)
       Dim node As TreeNode = tree.GetNodeAt(pt)
       node.Nodes.Add(e.Data.GetData(GetType(TreeNode)))
       node.Expand()
   End Sub

End Class

 </source>