VB.NET TreeView.AfterSelect事件代码示例

' Handle the After_Select event.
Private Sub TreeView1_AfterSelect(ByVal sender As System.Object, _
    ByVal e As System.Windows.Forms.TreeViewEventArgs) _
        Handles TreeView1.AfterSelect

    ' Vary the response depending on which TreeViewAction
    ' triggered the event. 
    Select Case (e.Action)
        Case TreeViewAction.ByKeyboard
            MessageBox.Show("You like the keyboard!")
        Case TreeViewAction.ByMouse
            MessageBox.Show("You like the mouse!")
    End Select
End Sub

' 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 treeFood As System.Windows.Forms.TreeView
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.treeFood = New System.Windows.Forms.TreeView()
        Me.SuspendLayout()
        '
        'treeFood
        '
        Me.treeFood.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right)
        Me.treeFood.ImageIndex = -1
        Me.treeFood.Location = New System.Drawing.Point(4, 4)
        Me.treeFood.Name = "treeFood"
        Me.treeFood.SelectedImageIndex = -1
        Me.treeFood.Size = New System.Drawing.Size(284, 256)
        Me.treeFood.TabIndex = 0
        '
        'TreeViewExample
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.treeFood})
        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 = treeFood.Nodes.Add("Node")
        node.Nodes.Add("Leap 1")
        node.Nodes.Add("Leap 2")

        node = treeFood.Nodes.Add("Node 2")
        node.Nodes.Add("Leap 3")
        node.Nodes.Add("Leap 4")

    End Sub
    Private Sub treeFood_AfterSelect(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles treeFood.AfterSelect
        If e.Action = TreeViewAction.ByMouse Then
            MessageBox.Show(e.Node.FullPath)
        End If
    End Sub

End Class