form1.vb

来自「OOP With Microsoft VB.NET And Csharp Ste」· VB 代码 · 共 186 行

Public Class Form1
    Inherits System.Windows.Forms.Form

    Private m_library As Library

#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 listOfBooks As System.Windows.Forms.ListBox
    Friend WithEvents pageLength As System.Windows.Forms.NumericUpDown
    Friend WithEvents pageToDisplay As System.Windows.Forms.NumericUpDown
    Friend WithEvents page As System.Windows.Forms.RichTextBox
    Friend WithEvents titleLabel As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label3 As System.Windows.Forms.Label
    
    'Required by the Windows Form Designer
    Private components As System.ComponentModel.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.titleLabel = New System.Windows.Forms.Label()
        Me.pageToDisplay = New System.Windows.Forms.NumericUpDown()
        Me.pageLength = New System.Windows.Forms.NumericUpDown()
        Me.listOfBooks = New System.Windows.Forms.ListBox()
        Me.page = New System.Windows.Forms.RichTextBox()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.Label3 = New System.Windows.Forms.Label()
        CType(Me.pageToDisplay, System.ComponentModel.ISupportInitialize).BeginInit()
        CType(Me.pageLength, System.ComponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        '
        'titleLabel
        '
        Me.titleLabel.Location = New System.Drawing.Point(168, 8)
        Me.titleLabel.Name = "titleLabel"
        Me.titleLabel.Size = New System.Drawing.Size(100, 16)
        Me.titleLabel.TabIndex = 4
        '
        'pageToDisplay
        '
        Me.pageToDisplay.Location = New System.Drawing.Point(168, 168)
        Me.pageToDisplay.Minimum = New Decimal(New Integer() {1, 0, 0, 0})
        Me.pageToDisplay.Name = "pageToDisplay"
        Me.pageToDisplay.TabIndex = 2
        Me.pageToDisplay.Value = New Decimal(New Integer() {1, 0, 0, 0})
        '
        'pageLength
        '
        Me.pageLength.Location = New System.Drawing.Point(16, 168)
        Me.pageLength.Minimum = New Decimal(New Integer() {1, 0, 0, 0})
        Me.pageLength.Name = "pageLength"
        Me.pageLength.TabIndex = 1
        Me.pageLength.Value = New Decimal(New Integer() {1, 0, 0, 0})
        '
        'listOfBooks
        '
        Me.listOfBooks.Location = New System.Drawing.Point(16, 32)
        Me.listOfBooks.Name = "listOfBooks"
        Me.listOfBooks.Size = New System.Drawing.Size(120, 95)
        Me.listOfBooks.TabIndex = 0
        '
        'page
        '
        Me.page.Location = New System.Drawing.Point(168, 32)
        Me.page.Name = "page"
        Me.page.Size = New System.Drawing.Size(120, 96)
        Me.page.TabIndex = 3
        Me.page.Text = ""
        '
        'Label1
        '
        Me.Label1.Location = New System.Drawing.Point(16, 8)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(100, 16)
        Me.Label1.TabIndex = 5
        Me.Label1.Text = "List of books"
        '
        'Label2
        '
        Me.Label2.Location = New System.Drawing.Point(16, 144)
        Me.Label2.Name = "Label2"
        Me.Label2.TabIndex = 6
        Me.Label2.Text = "Page length"
        '
        'Label3
        '
        Me.Label3.Location = New System.Drawing.Point(168, 144)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(100, 16)
        Me.Label3.TabIndex = 7
        Me.Label3.Text = "Page to display"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(304, 205)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label3, Me.Label2, Me.Label1, Me.titleLabel, Me.page, Me.pageToDisplay, Me.pageLength, Me.listOfBooks})
        Me.Name = "Form1"
        Me.Text = "Read Books"
        CType(Me.pageToDisplay, System.ComponentModel.ISupportInitialize).EndInit()
        CType(Me.pageLength, System.ComponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub ShowPage_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
        Dim fairyTales As Book
        fairyTales = New Book()
        fairyTales.Text = "Once upon a time there was a bear."
        fairyTales.PageLength = 8
        fairyTales.Title = "Fairy Tales"
        Dim cookies As Book = New Book()
        cookies.Text = "Chocolate chip cookies are the most delicious cookies."
        cookies.PageLength = 8
        cookies.Title = "Cookie Recipes"
        Dim page As Integer = 3
        Dim report As String
        report = "Page " & page.ToString() & ControlChars.CrLf _
            & fairyTales.Title & ": " & fairyTales.GetPage(page) _
            & ControlChars.CrLf _
            & "Cookies: " & cookies.GetPage(page)
        MessageBox.Show(report)
        report = "Titles: " + fairyTales.Title & " and " & cookies.Title
        MessageBox.Show(report)

    End Sub

    Private Sub Form1_Load(ByVal sender As Object, _
    ByVal e As System.EventArgs) Handles MyBase.Load
        m_library = New Library()
        Dim cookies As New Book()
        cookies.Text = "Chocolate chip cookies are the most delicious cookies."
        cookies.PageLength = 8
        cookies.Title = "Cookies"

        Dim fairyTales As New Book()
        fairyTales.Text = "Once upon a time there was a bear."
        fairyTales.PageLength = 8
        fairyTales.Title = "Fairy Tales"

        m_library.CheckIn(cookies)
        m_library.CheckIn(fairyTales)

        listOfBooks.Items.Add(cookies.Title)
        listOfBooks.Items.Add(fairyTales.Title)
    End Sub


    Private Sub listOfBooks_SelectedIndexChanged(ByVal sender _
    As System.Object, ByVal e As System.EventArgs) _
    Handles listOfBooks.SelectedIndexChanged
        Dim title As String = listOfBooks.SelectedItem.ToString()
        Dim theBook As Book = m_library.CheckOut(title)
        theBook.PageLength = CType(pageLength.Value, Integer)
        titleLabel.Text = theBook.Title
        page.Text = theBook.GetPage(CType(pageToDisplay.Value, Integer))
        m_library.CheckIn(theBook)
    End Sub

End Class