VB.Net Tutorial/GUI/NumericUpDown — различия между версиями

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Текущая версия на 15:57, 26 мая 2010

Get value from the NumericUpDown control

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

  public Shared Sub Main
       Application.Run(New FrmInterestCalculator)
  End Sub

End class Public Class FrmInterestCalculator

  Private Sub btnCalculate_Click(ByVal sender As System.Object, _
     ByVal e As System.EventArgs) Handles btnCalculate.Click
     
     Console.WriteLine(Convert.ToInt32(updYear.Value))
  End Sub

End Class <Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _ Partial Class FrmInterestCalculator

  Inherits System.Windows.Forms.Form
  "Form overrides dispose to clean up the component list.
  <System.Diagnostics.DebuggerNonUserCode()> _
  Protected 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.btnCalculate = New System.Windows.Forms.Button
     Me.txtDisplay = New System.Windows.Forms.TextBox
     Me.lblBalance = New System.Windows.Forms.Label
     Me.updYear = New System.Windows.Forms.NumericUpDown
     Me.lblYears = New System.Windows.Forms.Label
     Me.txtInterest = New System.Windows.Forms.TextBox
     Me.lblInterest = New System.Windows.Forms.Label
     Me.txtPrincipal = New System.Windows.Forms.TextBox
     Me.lblPrincipal = New System.Windows.Forms.Label
     CType(Me.updYear, System.ruponentModel.ISupportInitialize).BeginInit()
     Me.SuspendLayout()
     "
     "btnCalculate
     "
     Me.btnCalculate.Location = New System.Drawing.Point(197, 14)
     Me.btnCalculate.Name = "btnCalculate"
     Me.btnCalculate.Size = New System.Drawing.Size(75, 23)
     Me.btnCalculate.TabIndex = 17
     Me.btnCalculate.Text = "Calculate"
     "
     "txtDisplay
     "
     Me.txtDisplay.BackColor = System.Drawing.SystemColors.Control
     Me.txtDisplay.Location = New System.Drawing.Point(18, 170)
     Me.txtDisplay.Multiline = True
     Me.txtDisplay.Name = "txtDisplay"
     Me.txtDisplay.ReadOnly = True
     Me.txtDisplay.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
     Me.txtDisplay.Size = New System.Drawing.Size(254, 104)
     Me.txtDisplay.TabIndex = 16
     "
     "lblBalance
     "
     Me.lblBalance.AutoSize = True
     Me.lblBalance.Location = New System.Drawing.Point(17, 143)
     Me.lblBalance.Name = "lblBalance"
     Me.lblBalance.Size = New System.Drawing.Size(122, 13)
     Me.lblBalance.TabIndex = 15
     Me.lblBalance.Text = "Yearly account balance:"
     "
     "updYear
     "
     Me.updYear.Location = New System.Drawing.Point(85, 95)
     Me.updYear.Maximum = New Decimal(New Integer() {10, 0, 0, 0})
     Me.updYear.Minimum = New Decimal(New Integer() {1, 0, 0, 0})
     Me.updYear.Name = "updYear"
     Me.updYear.ReadOnly = True
     Me.updYear.Size = New System.Drawing.Size(100, 20)
     Me.updYear.TabIndex = 14
     Me.updYear.TextAlign = System.Windows.Forms.HorizontalAlignment.Right
     Me.updYear.Value = New Decimal(New Integer() {1, 0, 0, 0})
     "
     "lblYears
     "
     Me.lblYears.AutoSize = True
     Me.lblYears.Location = New System.Drawing.Point(17, 102)
     Me.lblYears.Name = "lblYears"
     Me.lblYears.Size = New System.Drawing.Size(37, 13)
     Me.lblYears.TabIndex = 13
     Me.lblYears.Text = "Years:"
     "
     "txtInterest
     "
     Me.txtInterest.Location = New System.Drawing.Point(85, 58)
     Me.txtInterest.Name = "txtInterest"
     Me.txtInterest.Size = New System.Drawing.Size(100, 20)
     Me.txtInterest.TabIndex = 12
     Me.txtInterest.TextAlign = System.Windows.Forms.HorizontalAlignment.Right
     "
     "lblInterest
     "
     Me.lblInterest.AutoSize = True
     Me.lblInterest.Location = New System.Drawing.Point(17, 61)
     Me.lblInterest.Name = "lblInterest"
     Me.lblInterest.Size = New System.Drawing.Size(71, 13)
     Me.lblInterest.TabIndex = 11
     Me.lblInterest.Text = "Interest Rate:"
     "
     "txtPrincipal
     "
     Me.txtPrincipal.Location = New System.Drawing.Point(85, 17)
     Me.txtPrincipal.Name = "txtPrincipal"
     Me.txtPrincipal.Size = New System.Drawing.Size(100, 20)
     Me.txtPrincipal.TabIndex = 10
     Me.txtPrincipal.TextAlign = System.Windows.Forms.HorizontalAlignment.Right
     "
     "lblPrincipal
     "
     Me.lblPrincipal.AutoSize = True
     Me.lblPrincipal.Location = New System.Drawing.Point(17, 20)
     Me.lblPrincipal.Name = "lblPrincipal"
     Me.lblPrincipal.Size = New System.Drawing.Size(50, 13)
     Me.lblPrincipal.TabIndex = 9
     Me.lblPrincipal.Text = "Principal:"
     "
     "FrmInterestCalculator
     "
     Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
     Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
     Me.ClientSize = New System.Drawing.Size(289, 288)
     Me.Controls.Add(Me.btnCalculate)
     Me.Controls.Add(Me.txtDisplay)
     Me.Controls.Add(Me.lblBalance)
     Me.Controls.Add(Me.updYear)
     Me.Controls.Add(Me.lblYears)
     Me.Controls.Add(Me.txtInterest)
     Me.Controls.Add(Me.lblInterest)
     Me.Controls.Add(Me.txtPrincipal)
     Me.Controls.Add(Me.lblPrincipal)
     Me.Name = "FrmInterestCalculator"
     Me.Text = "Interest Calculator"
     CType(Me.updYear, System.ruponentModel.ISupportInitialize).EndInit()
     Me.ResumeLayout(False)
     Me.PerformLayout()
  End Sub
  Friend WithEvents btnCalculate As System.Windows.Forms.Button
  Friend WithEvents txtDisplay As System.Windows.Forms.TextBox
  Friend WithEvents lblBalance As System.Windows.Forms.Label
  Friend WithEvents updYear As System.Windows.Forms.NumericUpDown
  Friend WithEvents lblYears As System.Windows.Forms.Label
  Friend WithEvents txtInterest As System.Windows.Forms.TextBox
  Friend WithEvents lblInterest As System.Windows.Forms.Label
  Friend WithEvents txtPrincipal As System.Windows.Forms.TextBox
  Friend WithEvents lblPrincipal As System.Windows.Forms.Label

End Class</source>

ScrollBars - NumericUpDowns

<source lang="vbnet">imports System imports System.Drawing imports System.Windows.Forms public class NumericUpDowns : inherits Form

 dim hbar as HScrollBar
 dim vbar as VScrollBar
 dim nupdwn as NumericUpDown
 public sub New()
   Size = new Size(480,580)
   hbar = new HScrollBar()
   hbar.Parent = me
   hbar.Location = new Point(0, 25)
   hbar.Size = new Size(300, 25)
   hbar.Minimum = 25
   hbar.Maximum = 400
   hbar.SmallChange = 10
   hbar.LargeChange = 100
   hbar.Value = 10
   AddHandler hbar.ValueChanged, AddressOf hbar_OnValueChanged
   vbar = new VScrollBar()
   vbar.Parent = me
   vbar.Location = new Point(25, 25)
   vbar.Size = new Size(25, 300)
   vbar.Minimum = 25
   vbar.Maximum = 400
   vbar.SmallChange = 10
   vbar.LargeChange = 100
   vbar.Value = 10
   AddHandler vbar.ValueChanged, AddressOf vbar_OnValueChanged
   nupdwn = new NumericUpDown()
   nupdwn.Parent = me
   nupdwn.Location = new Point(100,100)
   nupdwn.Size = new Size(60,20)
   nupdwn.Value = 1
   nupdwn.Minimum = -10
   nupdwn.Maximum = 10
   nupdwn.Increment = .25d      "  decimal 
   nupdwn.DecimalPlaces = 2
   nupdwn.ReadOnly = true
   nupdwn.TextAlign = HorizontalAlignment.Right
   AddHandler nupdwn.ValueChanged, AddressOf nupdwn_OnValueChanged
 end sub
 private sub hbar_OnValueChanged(ByVal sender as object,ByVal e as EventArgs)
   Console.WriteLine(hbar.Value)
   Console.WriteLine(hbar.LargeChange)
 end sub
 private sub vbar_OnValueChanged(ByVal sender as object,ByVal e as EventArgs)
   Console.WriteLine(vbar.Value)
   Console.WriteLine(vbar.LargeChange)
 end sub
 private sub nupdwn_OnValueChanged(ByVal sender as object,ByVal e as EventArgs)
   Console.WriteLine(nupdwn.Value)
 end sub
 public shared sub Main() 
   Application.Run(new NumericUpDowns())
 end sub

end class</source>