本文整理汇总了VB.NET中System.Windows.Forms.TreeView.GetNodeAt方法的典型用法代码示例。如果您正苦于以下问题:VB.NET TreeView.GetNodeAt方法的具体用法?VB.NET TreeView.GetNodeAt怎么用?VB.NET TreeView.GetNodeAt使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Forms.TreeView
的用法示例。
在下文中一共展示了TreeView.GetNodeAt方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: Not
' Get the tree node under the mouse pointer and
' save it in the mySelectedNode variable.
Private Sub treeView1_MouseDown(sender As Object, _
e As System.Windows.Forms.MouseEventArgs)
mySelectedNode = treeView1.GetNodeAt(e.X, e.Y)
End Sub
Private Sub menuItem1_Click(sender As Object, e As System.EventArgs)
If Not (mySelectedNode Is Nothing) And _
Not (mySelectedNode.Parent Is Nothing) Then
treeView1.SelectedNode = mySelectedNode
treeView1.LabelEdit = True
If Not mySelectedNode.IsEditing Then
mySelectedNode.BeginEdit()
End If
Else
MessageBox.Show("No tree node selected or selected node is a root node." & _
Microsoft.VisualBasic.ControlChars.Cr & _
"Editing of root nodes is not allowed.", "Invalid selection")
End If
End Sub
Private Sub treeView1_AfterLabelEdit(sender As Object, _
e As System.Windows.Forms.NodeLabelEditEventArgs)
If Not (e.Label Is Nothing) Then
If e.Label.Length > 0 Then
If e.Label.IndexOfAny(New Char() {"@"c, "."c, ","c, "!"c}) = -1 Then
' Stop editing without canceling the label change.
e.Node.EndEdit(False)
Else
' Cancel the label edit action, inform the user, and
' place the node in edit mode again.
e.CancelEdit = True
MessageBox.Show("Invalid tree node label." & _
Microsoft.VisualBasic.ControlChars.Cr & _
"The invalid characters are: '@','.', ',', '!'", _
"Node Label Edit")
e.Node.BeginEdit()
End If
Else
' Cancel the label edit action, inform the user, and
' place the node in edit mode again.
e.CancelEdit = True
MessageBox.Show("Invalid tree node label." & _
Microsoft.VisualBasic.ControlChars.Cr & _
"The label cannot be blank", "Node Label Edit")
e.Node.BeginEdit()
End If
End If
End Sub
示例2: MainClass
' 导入命名空间
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