form1.vb

Source code for VB.NET book - Chapter 1.

Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows 窗体设计器生成的代码 "

    Public Sub New()
        MyBase.New()

        '该调用是 Windows 窗体设计器所必需的。
        InitializeComponent()

        '在 InitializeComponent() 调用之后添加任何初始化

    End Sub

    '窗体重写 dispose 以清理组件列表。
    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

    'Windows 窗体设计器所必需的
    Private components As System.ComponentModel.IContainer

    '注意: 以下过程是 Windows 窗体设计器所必需的
    '可以使用 Windows 窗体设计器修改此过程。
    '不要使用代码编辑器修改它。
    Friend WithEvents DateTimePicker1 As System.Windows.Forms.DateTimePicker
    Friend WithEvents ComboBox1 As System.Windows.Forms.ComboBox
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.DateTimePicker1 = New System.Windows.Forms.DateTimePicker
        Me.ComboBox1 = New System.Windows.Forms.ComboBox
        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.ComboBox1.Items.AddRange(New Object() {"Long", "Short", "Custom", "Time"})
        Me.ComboBox1.Location = New System.Drawing.Point(40, 200)
        Me.ComboBox1.Name = "ComboBox1"
        Me.ComboBox1.Size = New System.Drawing.Size(120, 21)
        Me.ComboBox1.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 = "显示格式："
        '
        '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.ComboBox1)
        Me.Controls.Add(Me.DateTimePicker1)
        Me.Name = "Form1"
        Me.Text = "DateTimePicker"
        Me.ResumeLayout(False)

    End Sub

#End Region

    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