VB.NET CheckedListBox.CheckedIndices属性代码示例

Private Sub WhatIsChecked_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WhatIsChecked.Click
    ' Display in a message box all the items that are checked.
    Dim indexChecked As Integer
    Dim itemChecked As Object
    Const quote As String = """"

    ' First show the index and check state of all selected items.
    For Each indexChecked In CheckedListBox1.CheckedIndices
        ' The indexChecked variable contains the index of the item.
        MessageBox.Show("Index#: " + indexChecked.ToString() + ", is checked. Checked state is:" + _
                        CheckedListBox1.GetItemCheckState(indexChecked).ToString() + ".")
    Next

    ' Next show the object title and check state for each item selected.
    For Each itemChecked In CheckedListBox1.CheckedItems

        ' Use the IndexOf method to get the index of an item.
        MessageBox.Show("Item with title: " + quote + itemChecked.ToString() + quote + _
                        ", is checked. Checked state is: " + _
                        CheckedListBox1.GetItemCheckState(CheckedListBox1.Items.IndexOf(itemChecked)).ToString() + ".")
    Next

End Sub

' 导入命名空间
Imports System.Windows.Forms

public class CheckedListBoxAddItemGetSelected
   public Shared Sub Main
        Application.Run(New 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 btnAddItems As System.Windows.Forms.Button
    Friend WithEvents clb1 As System.Windows.Forms.CheckedListBox
    Friend WithEvents btnGetCheckedIndices As System.Windows.Forms.Button
    Friend WithEvents btnGetCheckedItems As System.Windows.Forms.Button
    Friend WithEvents ColorDialog1 As System.Windows.Forms.ColorDialog
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.btnAddItems = New System.Windows.Forms.Button()
        Me.clb1 = New System.Windows.Forms.CheckedListBox()
        Me.btnGetCheckedItems = New System.Windows.Forms.Button()
        Me.btnGetCheckedIndices = New System.Windows.Forms.Button()
        Me.ColorDialog1 = New System.Windows.Forms.ColorDialog()
        Me.SuspendLayout()
        '
        'btnAddItems
        '
        Me.btnAddItems.BackColor = System.Drawing.SystemColors.ControlLight
        Me.btnAddItems.Location = New System.Drawing.Point(176, 8)
        Me.btnAddItems.Name = "btnAddItems"
        Me.btnAddItems.Size = New System.Drawing.Size(104, 24)
        Me.btnAddItems.TabIndex = 3
        Me.btnAddItems.Text = "Add Items"
        '
        'clb1
        '
        Me.clb1.Location = New System.Drawing.Point(16, 8)
        Me.clb1.Name = "clb1"
        Me.clb1.Size = New System.Drawing.Size(144, 79)
        Me.clb1.TabIndex = 4
        '
        'btnGetCheckedItems
        '
        Me.btnGetCheckedItems.BackColor = System.Drawing.SystemColors.ControlLight
        Me.btnGetCheckedItems.Location = New System.Drawing.Point(176, 40)
        Me.btnGetCheckedItems.Name = "btnGetCheckedItems"
        Me.btnGetCheckedItems.Size = New System.Drawing.Size(104, 24)
        Me.btnGetCheckedItems.TabIndex = 5
        Me.btnGetCheckedItems.Text = "Checked by Item"
        '
        'btnGetCheckedIndices
        '
        Me.btnGetCheckedIndices.BackColor = System.Drawing.SystemColors.ControlLight
        Me.btnGetCheckedIndices.Location = New System.Drawing.Point(176, 72)
        Me.btnGetCheckedIndices.Name = "btnGetCheckedIndices"
        Me.btnGetCheckedIndices.Size = New System.Drawing.Size(104, 24)
        Me.btnGetCheckedIndices.TabIndex = 6
        Me.btnGetCheckedIndices.Text = "Checked by Index"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(296, 277)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnGetCheckedIndices, Me.btnGetCheckedItems, Me.clb1, Me.btnAddItems})
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub btnAddItems_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddItems.Click
        clb1.Items.Add("A", True)
        clb1.Items.Add("B", True)
        clb1.Items.Add("C", True)
        clb1.Items.Add("D", False)
    End Sub

    Private Sub btnGetCheckedItems_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGetCheckedItems.Click
        Dim o As Object
        For Each o In clb1.CheckedItems
            Console.WriteLine(o.ToString)
        Next o
        
    End Sub

    Private Sub btnGetCheckedIndices_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnGetCheckedIndices.Click
        Dim o As Object
        For Each o In clb1.CheckedIndices
            Console.WriteLine(o)
        Next o
    End Sub

End Class