VB.Net Tutorial/GUI/DateTimePicker

DataTimePicker format

Imports System.Windows.Forms
public class DataTimePickerFormat
   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
    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
    Private components As System.ruponentModel.IContainer
    Friend WithEvents DateTimePicker1 As System.Windows.Forms.DateTimePicker
    Friend WithEvents ComboBox1 As System.Windows.Forms.ruboBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.DateTimePicker1 = New System.Windows.Forms.DateTimePicker
        Me.ruboBox1 = New System.Windows.Forms.ruboBox
        Me.Label1 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        "
        "DateTimePicker1
        "
        Me.DateTimePicker1.Location = New System.Drawing.Point(40, 24)
        Me.DateTimePicker1.Name = "DateTimePicker1"
        Me.DateTimePicker1.Size = New System.Drawing.Size(120, 20)
        Me.DateTimePicker1.TabIndex = 0
        "
        "ComboBox1
        "
        Me.ruboBox1.Items.AddRange(New Object() {"Long", "Short", "Custom", "Time"})
        Me.ruboBox1.Location = New System.Drawing.Point(40, 200)
        Me.ruboBox1.Name = "ComboBox1"
        Me.ruboBox1.Size = New System.Drawing.Size(120, 21)
        Me.ruboBox1.TabIndex = 1
        "
        "Label1
        "
        Me.Label1.Location = New System.Drawing.Point(40, 160)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(80, 24)
        Me.Label1.TabIndex = 2
        Me.Label1.Text = "Format"
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.ruboBox1)
        Me.Controls.Add(Me.DateTimePicker1)
        Me.Name = "Form1"
        Me.Text = "DateTimePicker"
        Me.ResumeLayout(False)
    End Sub
    Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
        If ComboBox1.SelectedIndex < 0 Then
            Return
        End If
        Dim caption As String = ComboBox1.SelectedItem.ToString().Chars(0)
        Dim format As DateTimePickerFormat
        Select Case caption
            Case "S"c
                format = DateTimePickerFormat.Short
            Case "T"c
                format = DateTimePickerFormat.Time
            Case "C"c
                format = DateTimePickerFormat.Custom
            Case Else
                format = DateTimePickerFormat.Long
        End Select
        DateTimePicker1.Format = format
    End Sub
End Class

DateTimePicker format: LongDate, LongTime, ShortDate, ShortTime

Option Strict On
imports System
imports System.Drawing
imports System.Windows.Forms
public class DTPicker : inherits Form
  dim dtp as DateTimePicker
  public sub New()
    Size = new Size(400,300)
    AddHandler me.Load, AddressOf me_Load
    dtp = new DateTimePicker()
    dtp.Parent = me
    dtp.Location = new Point(20,20)
    dtp.Size = new Size(ClientSize.Width - 40, dtp.PreferredHeight)
    dtp.Anchor = AnchorStyles.Top or AnchorStyles.Left or AnchorStyles.Right
    dim fnt as new Font("Times New Roman", 16)
    dtp.CalendarFont = new Font(fnt, FontStyle.Bold or FontStyle.Italic)
    dtp.CalendarForeColor = Color.Red
    dtp.CalendarMonthBackground = Color.Yellow
    dtp.CalendarTitleBackColor = Color.Lime
    dtp.CalendarTitleForeColor = Color.Blue
    dtp.CalendarTrailingForeColor = Color.FromArgb(255,192,192)
    dtp.CustomFormat = "dddd,MMMM d, yyyy "at" h:mm:ss tt"
    dtp.Format = DateTimePickerFormat.Custom
    dtp.DropDownAlign = LeftRightAlignment.Right
    dtp.ShowUpDown = false      " default
    AddHandler dtp.ValueChanged, AddressOf dtp_ValueChanged
  end sub
  public shared sub Main() 
    Application.Run(new DTPicker())
  end sub
  private sub UpdateLabels()
    Console.WriteLine(dtp.Value.ToString())
    Console.WriteLine(dtp.Value.ToLongDateString())
    Console.WriteLine(dtp.Value.ToLongTimeString())
    Console.WriteLine(dtp.Value.ToShortDateString())
    Console.WriteLine(dtp.Value.ToShortTimeString())
  end sub
  private sub me_Load(ByVal sender as object,ByVal e as EventArgs)
    UpdateLabels()
  end sub
  private sub dtp_ValueChanged(ByVal sender as object,ByVal e as EventArgs)
    UpdateLabels()
  end sub
  private sub txtCustomString_TextChanged(ByVal sender as object,ByVal e as EventArgs)
    UpdateLabels()
  end sub
end class

Get value from DateTimePicker

Imports System.Windows.Forms
public class UseMonthCalendarAndDateTimePicker
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class
Public Class Form1
    Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
        " ----- Check and display only valid dates.
        If (IsDate(TextBox1.Text) = True) Then
            Label1.Text = Date.Parse(TextBox1.Text).ToShortDateString
        Else
            Label1.Text = ""
        End If
    End Sub
    Private Sub DateTimePicker1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DateTimePicker1.ValueChanged
        " ----- Show the selected date.
        Label2.Text = DateTimePicker1.Value.ToShortDateString
    End Sub
    Private Sub MonthCalendar1_DateChanged(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DateRangeEventArgs) Handles MonthCalendar1.DateChanged
        " ---- Show the slected date.
        Label3.Text = MonthCalendar1.SelectionStart.ToShortDateString
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class Form1
    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.TextBox1 = New System.Windows.Forms.TextBox
        Me.DateTimePicker1 = New System.Windows.Forms.DateTimePicker
        Me.MonthCalendar1 = New System.Windows.Forms.MonthCalendar
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label4 = New System.Windows.Forms.Label
        Me.Label5 = New System.Windows.Forms.Label
        Me.Label6 = New System.Windows.Forms.Label
        Me.SuspendLayout()
        "
        "TextBox1
        "
        Me.TextBox1.Location = New System.Drawing.Point(72, 8)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(120, 20)
        Me.TextBox1.TabIndex = 0
        Me.TextBox1.Text = "2007-12-07"
        "
        "DateTimePicker1
        "
        Me.DateTimePicker1.Location = New System.Drawing.Point(72, 48)
        Me.DateTimePicker1.Name = "DateTimePicker1"
        Me.DateTimePicker1.Size = New System.Drawing.Size(200, 20)
        Me.DateTimePicker1.TabIndex = 1
        Me.DateTimePicker1.Value = New Date(2007, 12, 7, 0, 0, 0, 0)
        "
        "MonthCalendar1
        "
        Me.MonthCalendar1.Location = New System.Drawing.Point(72, 88)
        Me.MonthCalendar1.Name = "MonthCalendar1"
        Me.MonthCalendar1.TabIndex = 2
        "
        "Label1
        "
        Me.Label1.AutoSize = True
        Me.Label1.Location = New System.Drawing.Point(296, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(39, 13)
        Me.Label1.TabIndex = 3
        Me.Label1.Text = "Label1"
        "
        "Label2
        "
        Me.Label2.AutoSize = True
        Me.Label2.Location = New System.Drawing.Point(296, 48)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(39, 13)
        Me.Label2.TabIndex = 4
        Me.Label2.Text = "Label2"
        "
        "Label3
        "
        Me.Label3.AutoSize = True
        Me.Label3.Location = New System.Drawing.Point(296, 88)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(39, 13)
        Me.Label3.TabIndex = 5
        Me.Label3.Text = "Label3"
        "
        "Label4
        "
        Me.Label4.AutoSize = True
        Me.Label4.Location = New System.Drawing.Point(8, 10)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(57, 13)
        Me.Label4.TabIndex = 6
        Me.Label4.Text = "Plain Text:"
        "
        "Label5
        "
        Me.Label5.AutoSize = True
        Me.Label5.Location = New System.Drawing.Point(8, 50)
        Me.Label5.Name = "Label5"
        Me.Label5.Size = New System.Drawing.Size(40, 13)
        Me.Label5.TabIndex = 7
        Me.Label5.Text = "Picker:"
        "
        "Label6
        "
        Me.Label6.AutoSize = True
        Me.Label6.Location = New System.Drawing.Point(8, 88)
        Me.Label6.Name = "Label6"
        Me.Label6.Size = New System.Drawing.Size(52, 13)
        Me.Label6.TabIndex = 8
        Me.Label6.Text = "Calendar:"
        "
        "Form1
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(510, 258)
        Me.Controls.Add(Me.Label6)
        Me.Controls.Add(Me.Label5)
        Me.Controls.Add(Me.Label4)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.MonthCalendar1)
        Me.Controls.Add(Me.DateTimePicker1)
        Me.Controls.Add(Me.TextBox1)
        Me.Name = "Form1"
        Me.Text = "Using Controls to Enter or Select a Date"
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents DateTimePicker1 As System.Windows.Forms.DateTimePicker
    Friend WithEvents MonthCalendar1 As System.Windows.Forms.MonthCalendar
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label4 As System.Windows.Forms.Label
    Friend WithEvents Label5 As System.Windows.Forms.Label
    Friend WithEvents Label6 As System.Windows.Forms.Label
End Class