VB.Net Tutorial/GUI/CheckBox
Содержание
Add objects to CheckedListBox
<source lang="vbnet">Imports System.Windows.Forms
public class CheckedListBoxAddObjects
public Shared Sub Main Application.Run(New Form1) End Sub
End class Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles MyBase.Load clbEmployees.Items.Add(New Employee("A", "A"), True) clbEmployees.Items.Add(New Employee("B", "B"), False) clbEmployees.Items.Add(New Employee("C", "C"), CheckState.Indeterminate) End Sub Private Sub btnListSelections_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnListSelections.Click Dim checked_items As CheckedListBox.CheckedItemCollection = clbEmployees.CheckedItems Console.WriteLine("Selected Employees:") For Each item As Object In checked_items Console.WriteLine(item.ToString) Next item End Sub
End Class Public Class Employee
Public FirstName As String Public LastName As String Public Sub New(ByVal first_name As String, ByVal last_name As String) FirstName = first_name LastName = last_name End Sub Public Overrides Function ToString() As String Return FirstName & " " & LastName End Function
End Class <Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Public Class Form1
Inherits System.Windows.Forms.Form "Form overrides dispose to clean up the component list. <System.Diagnostics.DebuggerNonUserCode()> _ Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing AndAlso components IsNot Nothing Then components.Dispose() End If MyBase.Dispose(disposing) End Sub "Required by the Windows Form Designer Private components As System.ruponentModel.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. <System.Diagnostics.DebuggerStepThrough()> _ Private Sub InitializeComponent() Me.clbEmployees = New System.Windows.Forms.CheckedListBox Me.btnListSelections = New System.Windows.Forms.Button Me.SuspendLayout() " "clbEmployees " Me.clbEmployees.FormattingEnabled = True Me.clbEmployees.Location = New System.Drawing.Point(8, 8) Me.clbEmployees.Name = "clbEmployees" Me.clbEmployees.Size = New System.Drawing.Size(160, 123) Me.clbEmployees.TabIndex = 0 " "btnListSelections " Me.btnListSelections.Location = New System.Drawing.Point(8, 152) Me.btnListSelections.Name = "btnListSelections" Me.btnListSelections.Size = New System.Drawing.Size(160, 23) Me.btnListSelections.TabIndex = 1 Me.btnListSelections.Text = "List Selections" " "Form1 " Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!) Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font Me.ClientSize = New System.Drawing.Size(180, 187) Me.Controls.Add(Me.btnListSelections) Me.Controls.Add(Me.clbEmployees) Me.Name = "Form1" Me.Text = "UseCheckedListBox" Me.ResumeLayout(False) End Sub Friend WithEvents clbEmployees As System.Windows.Forms.CheckedListBox Friend WithEvents btnListSelections As System.Windows.Forms.Button
End Class</source>
CheckBox Check States
<source lang="vbnet">Imports System.Windows.Forms public class CheckBoxSelectedState
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 Friend WithEvents checkBoxA As System.Windows.Forms.CheckBox Friend WithEvents checkBoxB As System.Windows.Forms.CheckBox Friend WithEvents btnStatus As System.Windows.Forms.Button Friend WithEvents btnEnable As System.Windows.Forms.Button "Required by the Windows Form Designer Private components As System.ruponentModel.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. <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.checkBoxA = New System.Windows.Forms.CheckBox() Me.checkBoxB = New System.Windows.Forms.CheckBox() Me.btnStatus = New System.Windows.Forms.Button() Me.btnEnable = New System.Windows.Forms.Button() Me.SuspendLayout() " "checkBoxA " Me.checkBoxA.Checked = True Me.checkBoxA.CheckState = System.Windows.Forms.CheckState.Checked Me.checkBoxA.Location = New System.Drawing.Point(48, 72) Me.checkBoxA.Name = "checkBoxA" Me.checkBoxA.Size = New System.Drawing.Size(200, 24) Me.checkBoxA.TabIndex = 0 Me.checkBoxA.Text = "CheckBox A" " "checkBoxB " Me.checkBoxB.AutoCheck = False Me.checkBoxB.Checked = True Me.checkBoxB.CheckState = System.Windows.Forms.CheckState.Indeterminate Me.checkBoxB.Location = New System.Drawing.Point(48, 120) Me.checkBoxB.Name = "checkBoxB" Me.checkBoxB.Size = New System.Drawing.Size(200, 24) Me.checkBoxB.TabIndex = 1 Me.checkBoxB.Text = "CheckBox B" Me.checkBoxB.ThreeState = True " "btnStatus " Me.btnStatus.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right) Me.btnStatus.Location = New System.Drawing.Point(56, 192) Me.btnStatus.Name = "btnStatus" Me.btnStatus.Size = New System.Drawing.Size(136, 23) Me.btnStatus.TabIndex = 2 Me.btnStatus.Text = "View Checkbox Status" " "btnEnable " Me.btnEnable.Anchor = (System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Right) Me.btnEnable.Location = New System.Drawing.Point(224, 192) Me.btnEnable.Name = "btnEnable" Me.btnEnable.Size = New System.Drawing.Size(96, 23) Me.btnEnable.TabIndex = 3 Me.btnEnable.Text = "Enable" " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(368, 266) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnEnable, Me.btnStatus, Me.checkBoxB, Me.checkBoxA}) Me.Name = "Form1" Me.Text = "Form1" Me.ResumeLayout(False) End Sub
- End Region
Private Sub btnStatus_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles btnStatus.Click Dim status As String If checkBoxA.Checked = True Then status = "checkBoxA is checked. " & ControlChars.Cr Else status = "checkBoxA is unchecked. " & ControlChars.Cr End If If checkBoxB.ThreeState = True Then status = status & "checkBoxB"s CheckState is " & checkBoxB.CheckState.ToString() & "." Else If checkBoxB.Checked = True Then status = status & "checkBoxB is checked." Else status = status & "checkBoxB is unchecked." End If End If MessageBox.Show(status) End Sub Private Sub btnEnable_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles btnEnable.Click checkBoxB.AutoCheck = True checkBoxB.CheckState = CheckState.Checked checkBoxB.ThreeState = False End Sub
End Class</source>
CheckBox check/uncheck event
<source lang="vbnet">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.ruponentModel.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</source>
CheckBox with three states
<source lang="vbnet">Imports System.Drawing Imports System.Drawing.Drawing2D Imports System.Windows.Forms public class CheckBoxThreeStates
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.ruponentModel.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 CheckBox1 As System.Windows.Forms.CheckBox Friend WithEvents CheckBox2 As System.Windows.Forms.CheckBox Friend WithEvents CheckBox3 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.Label1 = New System.Windows.Forms.Label Me.SuspendLayout() " "CheckBox1 " Me.CheckBox1.Location = New System.Drawing.Point(88, 64) Me.CheckBox1.Name = "CheckBox1" Me.CheckBox1.TabIndex = 0 Me.CheckBox1.Text = "Unchecked" " "CheckBox2 " Me.CheckBox2.Checked = True Me.CheckBox2.CheckState = System.Windows.Forms.CheckState.Checked Me.CheckBox2.Location = New System.Drawing.Point(88, 120) Me.CheckBox2.Name = "CheckBox2" Me.CheckBox2.TabIndex = 1 Me.CheckBox2.Text = "Checked" " "CheckBox3 " Me.CheckBox3.Checked = True Me.CheckBox3.CheckState = System.Windows.Forms.CheckState.Indeterminate Me.CheckBox3.Location = New System.Drawing.Point(88, 176) Me.CheckBox3.Name = "CheckBox3" Me.CheckBox3.TabIndex = 2 Me.CheckBox3.Text = "Indeterminate" Me.CheckBox3.ThreeState = True " "Form1 " Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13) Me.ClientSize = New System.Drawing.Size(272, 229) Me.Controls.Add(Me.Label1) 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
- End Region
End Class</source>
Using CheckBoxes to toggle italic and bold styles
<source lang="vbnet">Imports System.Windows.Forms Imports System.Drawing Imports System.Drawing.Drawing2D public class CheckBoxEvent
public Shared Sub Main Application.Run(New FrmCheckBox) End Sub
End class
Public Class FrmCheckBox
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 Friend WithEvents chkItalic As System.Windows.Forms.CheckBox Friend WithEvents lblOutput As System.Windows.Forms.Label Friend WithEvents chkBold As System.Windows.Forms.CheckBox "Required by the Windows Form Designer Private components As System.ruponentModel.Container "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. <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.lblOutput = New System.Windows.Forms.Label() Me.chkItalic = New System.Windows.Forms.CheckBox() Me.chkBold = New System.Windows.Forms.CheckBox() Me.SuspendLayout() " "lblOutput " Me.lblOutput.Font = New System.Drawing.Font("Microsoft Sans Serif", 11.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.lblOutput.Location = New System.Drawing.Point(48, 24) Me.lblOutput.Name = "lblOutput" Me.lblOutput.Size = New System.Drawing.Size(208, 24) Me.lblOutput.TabIndex = 0 Me.lblOutput.Text = "Watch the font style change" " "chkItalic " Me.chkItalic.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.chkItalic.Location = New System.Drawing.Point(152, 64) Me.chkItalic.Name = "chkItalic" Me.chkItalic.Size = New System.Drawing.Size(64, 24) Me.chkItalic.TabIndex = 2 Me.chkItalic.Text = "Italic" " "chkBold " Me.chkBold.Font = New System.Drawing.Font("Microsoft Sans Serif", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.chkBold.Location = New System.Drawing.Point(80, 64) Me.chkBold.Name = "chkBold" Me.chkBold.Size = New System.Drawing.Size(56, 24) Me.chkBold.TabIndex = 1 Me.chkBold.Text = "Bold" " "FrmCheckBox " Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14) Me.ClientSize = New System.Drawing.Size(292, 117) Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.chkItalic, Me.chkBold, Me.lblOutput}) Me.Font = New System.Drawing.Font("Microsoft Sans Serif", 9!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) Me.Name = "FrmCheckBox" Me.Text = "CheckBoxTest" Me.ResumeLayout(False) End Sub
- End Region
Private Sub chkItalic_CheckedChanged _ (ByVal sender As System.Object, ByVal e As System.EventArgs) _ Handles chkItalic.CheckedChanged lblOutput.Font = New Font("Microsoft Sans Serif", _ lblOutput.Font.Size, lblOutput.Font.Style Xor FontStyle.Italic) End Sub Private Sub chkBold_CheckedChanged _ (ByVal sender As System.Object, ByVal e As System.EventArgs) _ Handles chkBold.CheckedChanged lblOutput.Font = New Font("Microsoft Sans Serif", _ lblOutput.Font.Size, lblOutput.Font.Style Xor FontStyle.Bold) End Sub
End Class</source>