CheckBox check/uncheck event : CheckBox « GUI « VB.Net Tutorial






CheckBox check/uncheck event
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms

public class CheckBoxCheckEvent
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
    Inherits System.Windows.Forms.Form

    Public Sub New()
        MyBase.New()
        InitializeComponent()
    End Sub

    Private components As System.ComponentModel.IContainer
    Friend WithEvents CheckBox1 As System.Windows.Forms.CheckBox
    Friend WithEvents CheckBox2 As System.Windows.Forms.CheckBox
    Friend WithEvents CheckBox3 As System.Windows.Forms.CheckBox
    Friend WithEvents CheckBox4 As System.Windows.Forms.CheckBox
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents CheckBox5 As System.Windows.Forms.CheckBox
    Friend WithEvents CheckBox6 As System.Windows.Forms.CheckBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.CheckBox1 = New System.Windows.Forms.CheckBox
        Me.CheckBox2 = New System.Windows.Forms.CheckBox
        Me.CheckBox3 = New System.Windows.Forms.CheckBox
        Me.CheckBox4 = New System.Windows.Forms.CheckBox
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.CheckBox5 = New System.Windows.Forms.CheckBox
        Me.CheckBox6 = New System.Windows.Forms.CheckBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        '
        'CheckBox1
        '
        Me.CheckBox1.Location = New System.Drawing.Point(24, 64)
        Me.CheckBox1.Name = "CheckBox1"
        Me.CheckBox1.TabIndex = 0
        Me.CheckBox1.Text = "CheckBox1"
        '
        'CheckBox2
        '
        Me.CheckBox2.Location = New System.Drawing.Point(152, 64)
        Me.CheckBox2.Name = "CheckBox2"
        Me.CheckBox2.TabIndex = 1
        Me.CheckBox2.Text = "CheckBox2"
        '
        'CheckBox3
        '
        Me.CheckBox3.Location = New System.Drawing.Point(24, 120)
        Me.CheckBox3.Name = "CheckBox3"
        Me.CheckBox3.TabIndex = 2
        Me.CheckBox3.Text = "CheckBox3"
        '
        'CheckBox4
        '
        Me.CheckBox4.Location = New System.Drawing.Point(152, 120)
        Me.CheckBox4.Name = "CheckBox4"
        Me.CheckBox4.TabIndex = 3
        Me.CheckBox4.Text = "CheckBox4"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(32, 232)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(216, 20)
        Me.TextBox1.TabIndex = 4
        Me.TextBox1.Text = "TextBox1"
        '
        'CheckBox5
        '
        Me.CheckBox5.Location = New System.Drawing.Point(24, 176)
        Me.CheckBox5.Name = "CheckBox5"
        Me.CheckBox5.TabIndex = 5
        Me.CheckBox5.Text = "CheckBox5"
        '
        'CheckBox6
        '
        Me.CheckBox6.Location = New System.Drawing.Point(152, 176)
        Me.CheckBox6.Name = "CheckBox6"
        Me.CheckBox6.TabIndex = 6
        Me.CheckBox6.Text = "CheckBox6"
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 24.0!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Label1.Location = New System.Drawing.Point(0, 0)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(208, 48)
        Me.Label1.TabIndex = 7
        Me.Label1.Text = "Check Boxes"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.CheckBox6)
        Me.Controls.Add(Me.CheckBox5)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.CheckBox4)
        Me.Controls.Add(Me.CheckBox3)
        Me.Controls.Add(Me.CheckBox2)
        Me.Controls.Add(Me.CheckBox1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

    Private Sub CheckBox1_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox1.CheckedChanged
        If CheckBox1.Checked Then
            TextBox1.Text = "Check box 1 is checked."
        Else
            TextBox1.Text = "Check box 1 is not checked."
        End If
    End Sub

    Private Sub CheckBox2_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox2.CheckedChanged
        If CheckBox2.Checked Then
            TextBox1.Text = "Check box 2 is checked."
        Else
            TextBox1.Text = "Check box 2 is not checked."
        End If
    End Sub

    Private Sub CheckBox3_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox3.CheckedChanged
        If CheckBox3.Checked Then
            TextBox1.Text = "Check box 3 is checked."
        Else
            TextBox1.Text = "Check box 3 is not checked."
        End If
    End Sub

    Private Sub CheckBox4_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox4.CheckedChanged
        If CheckBox4.Checked Then
            TextBox1.Text = "Check box 4 is checked."
        Else
            TextBox1.Text = "Check box 4 is not checked."
        End If
    End Sub

    Private Sub CheckBox5_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox5.CheckedChanged
        If CheckBox5.Checked Then
            TextBox1.Text = "Check box 5 is checked."
        Else
            TextBox1.Text = "Check box 5 is not checked."
        End If
    End Sub

    Private Sub CheckBox6_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckBox6.CheckedChanged
        If CheckBox6.Checked Then
            TextBox1.Text = "Check box 6 is checked."
        Else
            TextBox1.Text = "Check box 6 is not checked."
        End If
    End Sub
End Class








14.4.CheckBox
14.4.1.CheckBox Check StatesCheckBox Check States
14.4.2.Using CheckBoxes to toggle italic and bold stylesUsing CheckBoxes to toggle italic and bold styles
14.4.3.CheckBox check/uncheck eventCheckBox check/uncheck event
14.4.4.CheckBox with three statesCheckBox with three states
14.4.5.Add objects to CheckedListBoxAdd objects to CheckedListBox