form1.vb

作业练习题 你们

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 PrintDocument1 As System.Drawing.Printing.PrintDocument
    Friend WithEvents PrintPreviewDialog1 As System.Windows.Forms.PrintPreviewDialog
    Friend WithEvents OpenFileDialog1 As System.Windows.Forms.OpenFileDialog
    Friend WithEvents SaveFileDialog1 As System.Windows.Forms.SaveFileDialog
    Friend WithEvents MainMenu1 As System.Windows.Forms.MainMenu
    Friend WithEvents MenuItem1 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem2 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem3 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem4 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem5 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem6 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem7 As System.Windows.Forms.MenuItem
    Friend WithEvents MenuItem8 As System.Windows.Forms.MenuItem
    Friend WithEvents RichTextBox1 As System.Windows.Forms.RichTextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Dim resources As System.Resources.ResourceManager = New System.Resources.ResourceManager(GetType(Form1))
        Me.PrintDocument1 = New System.Drawing.Printing.PrintDocument
        Me.PrintPreviewDialog1 = New System.Windows.Forms.PrintPreviewDialog
        Me.OpenFileDialog1 = New System.Windows.Forms.OpenFileDialog
        Me.SaveFileDialog1 = New System.Windows.Forms.SaveFileDialog
        Me.MainMenu1 = New System.Windows.Forms.MainMenu
        Me.MenuItem1 = New System.Windows.Forms.MenuItem
        Me.MenuItem2 = New System.Windows.Forms.MenuItem
        Me.MenuItem3 = New System.Windows.Forms.MenuItem
        Me.MenuItem4 = New System.Windows.Forms.MenuItem
        Me.MenuItem5 = New System.Windows.Forms.MenuItem
        Me.MenuItem6 = New System.Windows.Forms.MenuItem
        Me.MenuItem7 = New System.Windows.Forms.MenuItem
        Me.MenuItem8 = New System.Windows.Forms.MenuItem
        Me.RichTextBox1 = New System.Windows.Forms.RichTextBox
        Me.SuspendLayout()
        '
        'PrintDocument1
        '
        '
        'PrintPreviewDialog1
        '
        Me.PrintPreviewDialog1.AutoScrollMargin = New System.Drawing.Size(0, 0)
        Me.PrintPreviewDialog1.AutoScrollMinSize = New System.Drawing.Size(0, 0)
        Me.PrintPreviewDialog1.ClientSize = New System.Drawing.Size(400, 300)
        Me.PrintPreviewDialog1.Document = Me.PrintDocument1
        Me.PrintPreviewDialog1.Enabled = True
        Me.PrintPreviewDialog1.Icon = CType(resources.GetObject("PrintPreviewDialog1.Icon"), System.Drawing.Icon)
        Me.PrintPreviewDialog1.Location = New System.Drawing.Point(147, 19)
        Me.PrintPreviewDialog1.MinimumSize = New System.Drawing.Size(375, 250)
        Me.PrintPreviewDialog1.Name = "PrintPreviewDialog1"
        Me.PrintPreviewDialog1.TransparencyKey = System.Drawing.Color.Empty
        Me.PrintPreviewDialog1.Visible = False
        '
        'MainMenu1
        '
        Me.MainMenu1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem1})
        '
        'MenuItem1
        '
        Me.MenuItem1.Index = 0
        Me.MenuItem1.MenuItems.AddRange(New System.Windows.Forms.MenuItem() {Me.MenuItem2, Me.MenuItem3, Me.MenuItem4, Me.MenuItem5, Me.MenuItem6, Me.MenuItem7, Me.MenuItem8})
        Me.MenuItem1.Text = "文件"
        '
        'MenuItem2
        '
        Me.MenuItem2.Index = 0
        Me.MenuItem2.Text = "打开"
        '
        'MenuItem3
        '
        Me.MenuItem3.Index = 1
        Me.MenuItem3.Text = "保存"
        '
        'MenuItem4
        '
        Me.MenuItem4.Index = 2
        Me.MenuItem4.Text = "-"
        '
        'MenuItem5
        '
        Me.MenuItem5.Index = 3
        Me.MenuItem5.Text = "预览"
        '
        'MenuItem6
        '
        Me.MenuItem6.Index = 4
        Me.MenuItem6.Text = "打印"
        '
        'MenuItem7
        '
        Me.MenuItem7.Index = 5
        Me.MenuItem7.Text = "-"
        '
        'MenuItem8
        '
        Me.MenuItem8.Index = 6
        Me.MenuItem8.Text = "退出"
        '
        'RichTextBox1
        '
        Me.RichTextBox1.Dock = System.Windows.Forms.DockStyle.Fill
        Me.RichTextBox1.Location = New System.Drawing.Point(0, 0)
        Me.RichTextBox1.Name = "RichTextBox1"
        Me.RichTextBox1.Size = New System.Drawing.Size(292, 266)
        Me.RichTextBox1.TabIndex = 0
        Me.RichTextBox1.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.Add(Me.RichTextBox1)
        Me.Menu = Me.MainMenu1
        Me.Name = "Form1"
        Me.Text = "打印"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Dim streamToPrint As System.IO.StringReader
    Private Sub MenuItem2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem2.Click
        Dim textline As String
        OpenFileDialog1.ShowDialog()
        FileOpen(1, OpenFileDialog1.FileName, OpenMode.Input)
        While Not EOF(1)
            textline = LineInput(1)
            RichTextBox1.Text = RichTextBox1.Text + textline + Chr(13) + Chr(10)
        End While
        FileClose(1)
    End Sub

    Private Sub MenuItem3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem3.Click
        SaveFileDialog1.ShowDialog()
        RichTextBox1.SaveFile(SaveFileDialog1.FileName)
    End Sub

    Private Sub MenuItem5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem5.Click
        streamToPrint = New System.IO.StringReader(RichTextBox1.Text)
        PrintPreviewDialog1.ShowDialog()
    End Sub

    Private Sub MenuItem6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem6.Click
        streamToPrint = New System.IO.StringReader(RichTextBox1.Text)
        PrintDocument1.Print()
    End Sub

    Private Sub PrintDocument1_PrintPage(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs) Handles PrintDocument1.PrintPage
        Dim sngLinePerPage As Single = 0
        Dim sngVerticalPos As Single = 0
        Dim intCount As Integer = 0
        Dim sngLeftMargin As Single = e.MarginBounds.Left
        Dim sngTopMargin As Single = e.MarginBounds.Top
        Dim strLine As String

        sngLinePerpage = e.MarginBounds.Height / RichTextBox1.Font.GetHeight(e.Graphics)

        strLine = streamToPrint.ReadLine
        While ((intCount < sngLinePerPage) And Not (strLine Is Nothing))
            sngVerticalPos = sngTopMargin + (intCount * RichTextBox1.Font.GetHeight(e.Graphics))
            e.Graphics.DrawString(strLine, RichTextBox1.Font, Brushes.Black, sngLeftMargin, sngVerticalPos, New StringFormat)
            intCount = intCount + 1
            If (intCount < sngLinePerPage) Then
                strLine = streamToPrint.ReadLine
            End If
        End While

        If (strLine <> Nothing) Then
            e.HasMorePages = True
        Else
            e.HasMorePages = False
        End If
    End Sub

    Private Sub MenuItem8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem8.Click
        End
    End Sub
End Class