Mega Code Archive
TreeView AllowDrop
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Imports System
Imports System.Collections
Imports System.Data
Imports System.Drawing
Imports System.Windows.Forms
Imports System.ComponentModel
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
#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.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.
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
#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
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