form1.vb

来自「Visual Basic .NET程序设计教程源代码」· VB 代码 · 共 131 行

Public Class Form1
    Inherits System.Windows.Forms.Form
    Structure person
        Public ID As Integer
        Public Name As String
    End Structure
    Dim MyRecord As person
    Dim RecordNumber As Integer
#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 Button1 As System.Windows.Forms.Button
    Friend WithEvents Button2 As System.Windows.Forms.Button
    Friend WithEvents Button3 As System.Windows.Forms.Button
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button
        Me.Button2 = New System.Windows.Forms.Button
        Me.Button3 = New System.Windows.Forms.Button
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(200, 24)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "Button1"
        '
        'Button2
        '
        Me.Button2.Location = New System.Drawing.Point(200, 64)
        Me.Button2.Name = "Button2"
        Me.Button2.TabIndex = 1
        Me.Button2.Text = "Button2"
        '
        'Button3
        '
        Me.Button3.Location = New System.Drawing.Point(200, 104)
        Me.Button3.Name = "Button3"
        Me.Button3.TabIndex = 2
        Me.Button3.Text = "Button3"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(16, 16)
        Me.TextBox1.Multiline = True
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical
        Me.TextBox1.Size = New System.Drawing.Size(168, 120)
        Me.TextBox1.TabIndex = 3
        Me.TextBox1.Text = "TextBox1"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(292, 149)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Button3)
        Me.Controls.Add(Me.Button2)
        Me.Controls.Add(Me.Button1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Me.Text = "二进制文件存取"
        Button1.Text = "写入数据"
        Button2.Text = "读取数据"
        Button3.Text = "退出程序"
        TextBox1.Text = ""
    End Sub

    Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim resp As Char
        FileOpen(1, "d:\bfile.txt", OpenMode.Binary)
        Do
            MyRecord.ID = InputBox("请输入编号")
            MyRecord.Name = InputBox("请输入姓名")
            FilePut(1, MyRecord)
            resp = InputBox("继续输入吗？（Y/N）")
        Loop While UCase(resp) = "Y"
        FileClose(1)
    End Sub

    Private Sub Button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim S As String
        Dim cl As String = Chr(13) & Chr(10)
        FileOpen(1, "d:\bfile.txt", OpenMode.Binary)
        Do While Not EOF(1)
            FileGet(1, MyRecord)
            S = S & MyRecord.ID & " " & MyRecord.Name & cl
        Loop
        TextBox1.Text = S
        FileClose(1)
    End Sub

    Private Sub Button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button3.Click
        Close()
    End Sub
End Class