VB.Net/GUI/CheckBox

Материал из VB Эксперт
Версия от 15:43, 26 мая 2010; Admin (обсуждение | вклад) (1 версия)
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Get CheckBox Selection state

<source lang="vbnet"> Imports System.Windows.Forms

Module Module1 

   Sub Main()
       Application.Run(New Form1)
   End Sub

End Module


Public Class Form1 

   Inherits System.Windows.Forms.Form
  1. 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(24, 32)
       Me.CheckBox1.Name = "CheckBox1"
       Me.CheckBox1.TabIndex = 0
       Me.CheckBox1.Text = "Item 1 "
       Me.CheckBox1.ThreeState = True
       "
       "CheckBox2
       "
       Me.CheckBox2.Location = New System.Drawing.Point(24, 72)
       Me.CheckBox2.Name = "CheckBox2"
       Me.CheckBox2.Size = New System.Drawing.Size(136, 24)
       Me.CheckBox2.TabIndex = 1
       Me.CheckBox2.Text = "Item 2 "
       Me.CheckBox2.ThreeState = True
       "
       "CheckBox3
       "
       Me.CheckBox3.Location = New System.Drawing.Point(24, 112)
       Me.CheckBox3.Name = "CheckBox3"
       Me.CheckBox3.Size = New System.Drawing.Size(144, 24)
       Me.CheckBox3.TabIndex = 2
       Me.CheckBox3.Text = "Item 3"
       Me.CheckBox3.ThreeState = True
       "
       "Label1
       "
       Me.Label1.Location = New System.Drawing.Point(32, 176)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(224, 56)
       Me.Label1.TabIndex = 3
       "
       "Form1
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
       Me.ClientSize = New System.Drawing.Size(292, 273)
       Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label1, Me.CheckBox3, Me.CheckBox2, Me.CheckBox1})
       Me.Name = "Form1"
       Me.Text = "CheckBoxDemo"
       Me.ResumeLayout(False)
   End Sub
  1. End Region
   Private Sub CheckBox1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles CheckBox1.Click, CheckBox2.Click, CheckBox3.Click
       Label1.Text = "Choices: "
       If (CheckBox1.Checked) Then
           Label1.Text = Label1.Text & " " & CheckBox1.Text
       End If
       If (CheckBox1.CheckState = CheckState.Indeterminate) Then
           Label1.Text = Label1.Text & " " & CheckBox1.Text & " (I)"
       End If
       If (CheckBox2.Checked) Then
           Label1.Text = Label1.Text & " " & CheckBox2.Text
       End If
       If (CheckBox2.CheckState = CheckState.Indeterminate) Then
           Label1.Text = Label1.Text & " " & CheckBox2.Text & " (I)"
       End If
       If (CheckBox3.Checked) Then
           Label1.Text = Label1.Text & " " & CheckBox3.Text
       End If
       If (CheckBox3.CheckState = CheckState.Indeterminate) Then
           Label1.Text = Label1.Text & " " & CheckBox3.Text & " (I)"
       End If
       Label1.Refresh()
   End Sub

End Class 

      </source>


Using CheckBoxes to toggle italic and bold styles

<source lang="vbnet"> Imports System Imports System.Drawing Imports System.Windows.Forms Public Class MainClass 

  Shared Sub Main()
       Dim myform As Form = New FrmCheckBox()
       Application.Run(myform)
  End Sub " Main

End Class Public Class FrmCheckBox 

  Inherits System.Windows.Forms.Form
  1. 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
  1. End Region
  " use Xor to toggle italic, keep other styles same
  Private Sub chkItalic_CheckedChanged _
     (ByVal sender As System.Object, ByVal e As System.EventArgs) _
     Handles chkItalic.CheckedChanged
     lblOutput.Font = New Font(lblOutput.Font.Name, _
        lblOutput.Font.Size, lblOutput.Font.Style _
        Xor FontStyle.Italic)
  End Sub " chkItalic_CheckedChanged
  " use Xor to toggle bold, keep other styles same
  Private Sub chkBold_CheckedChanged _
     (ByVal sender As System.Object, ByVal e As System.EventArgs) _
     Handles chkBold.CheckedChanged
     lblOutput.Font = New Font(lblOutput.Font.Name, _
        lblOutput.Font.Size, lblOutput.Font.Style _
        Xor FontStyle.Bold)
  End Sub

End Class 

      </source>
Источник — «http://vbex.ru/index.php?title=VB.Net/GUI/CheckBox&oldid=463»