List Box and Spinner Demo

Imports System
Imports System.Collections
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Resources
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.IO
Imports System.Drawing.Printing


Public Class MainClass
    Shared Sub Main()
        Dim myform As Form = New Form1()
        Application.Run(myform)
    End Sub
End Class

Public Class User
    'Public members
    Public Username As String
    Public Shared MinPasswordLength As Integer = 6

    'Private members
    Private _password As String

    'Password property
    Public Property Password() As String
        Get
            Return _password
        End Get
        Set(ByVal value As String)
            If value.Length >= MinPasswordLength Then
                _password = value
            End If
        End Set
    End Property

    Public Shared Function CreateUser(ByVal userName As String, _
        ByVal password As String) As User

        'Delcare a new User object
        Dim objUser As New User()

        'Set the User properties
        objUser.Username = userName
        objUser.Password = password

        'Return the new user
        Return objUser
    End Function
End Class

Public Class Form1
    'Private member
    Private arrUserList As New ArrayList()

    Private Sub UpdateDisplay()
        'Clear the list
        lstUsers.Items.Clear()

        'Add the users to the list box
        For Each objUser As User In arrUserList
            lstUsers.Items.Add(objUser.Username & ", " & objUser.Password & _
                 " (" & User.MinPasswordLength & ")")
        Next
    End Sub

    Private Sub Form1_Load(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles Me.Load

        'Load 100 users
        For intIndex As Integer = 1 To 100
            'Create a new user
            Dim objUser As New User
            objUser = User.CreateUser("Joe" & intIndex, "password15")
            'Add the user to the array list
            arrUserList.Add(objUser)
        Next

        'Update the display
        UpdateDisplay()
    End Sub

    Private Sub nupMinPasswordLength_ValueChanged(ByVal sender As Object, _
        ByVal e As System.EventArgs) Handles nupMinPasswordLength.ValueChanged

        'Set the minimum password length
        User.MinPasswordLength = nupMinPasswordLength.Value
        'Update the display
        UpdateDisplay()
    End Sub
End Class


<Global.Microsoft.VisualBasic.CompilerServices.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.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.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.nupMinPasswordLength = New System.Windows.Forms.NumericUpDown
        Me.Label1 = New System.Windows.Forms.Label
        Me.lstUsers = New System.Windows.Forms.ListBox
        CType(Me.nupMinPasswordLength, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'nupMinPasswordLength
        '
        Me.nupMinPasswordLength.Location = New System.Drawing.Point(287, 22)
        Me.nupMinPasswordLength.Maximum = New Decimal(New Integer() {10, 0, 0, 0})
        Me.nupMinPasswordLength.Name = "nupMinPasswordLength"
        Me.nupMinPasswordLength.Size = New System.Drawing.Size(84, 20)
        Me.nupMinPasswordLength.TabIndex = 5
        Me.nupMinPasswordLength.Value = New Decimal(New Integer() {6, 0, 0, 0})
        '
        'Label1
        '
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(287, 1)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(85, 13)
        Me.Label1.TabIndex = 4
        Me.Label1.Text = "Password Length"
        '
        'lstUsers
        '
        Me.lstUsers.FormattingEnabled = True
        Me.lstUsers.IntegralHeight = False
        Me.lstUsers.Location = New System.Drawing.Point(0, 1)
        Me.lstUsers.Name = "lstUsers"
        Me.lstUsers.Size = New System.Drawing.Size(280, 225)
        Me.lstUsers.TabIndex = 3
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(383, 226)
        Me.Controls.Add(Me.nupMinPasswordLength)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.lstUsers)
        Me.Name = "Form1"
        Me.Text = "Shared Demo"
        CType(Me.nupMinPasswordLength, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents nupMinPasswordLength As System.Windows.Forms.NumericUpDown
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents lstUsers As System.Windows.Forms.ListBox

End Class
Related examples in the same category

1.	NumericUpDown Demo
2.	Get value from NumericUpDown: Increment, Value and Max Value
List Box and Spinner Demo : NumericUpDown « GUI « VB.Net

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