form1.vb

苏金明编写的《用VB.NET和VC#.NET开发交互式CAD系统》一书的源代码

Imports System.Runtime.Serialization.Formatters.Binary
Imports System.IO


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

    '窗体重写处置以清理组件列表。
    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 btnSave As System.Windows.Forms.Button
    Friend WithEvents btnClear As System.Windows.Forms.Button
    Friend WithEvents btnShow As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.btnSave = New System.Windows.Forms.Button()
        Me.btnClear = New System.Windows.Forms.Button()
        Me.btnShow = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        '
        'btnSave
        '
        Me.btnSave.BackColor = System.Drawing.Color.FromArgb(CType(224, Byte), CType(224, Byte), CType(224, Byte))
        Me.btnSave.Location = New System.Drawing.Point(40, 184)
        Me.btnSave.Name = "btnSave"
        Me.btnSave.TabIndex = 0
        Me.btnSave.Text = "保 存"
        '
        'btnClear
        '
        Me.btnClear.BackColor = System.Drawing.Color.FromArgb(CType(224, Byte), CType(224, Byte), CType(224, Byte))
        Me.btnClear.Location = New System.Drawing.Point(144, 184)
        Me.btnClear.Name = "btnClear"
        Me.btnClear.TabIndex = 1
        Me.btnClear.Text = "清 除"
        '
        'btnShow
        '
        Me.btnShow.BackColor = System.Drawing.Color.FromArgb(CType(224, Byte), CType(224, Byte), CType(224, Byte))
        Me.btnShow.Location = New System.Drawing.Point(256, 184)
        Me.btnShow.Name = "btnShow"
        Me.btnShow.TabIndex = 2
        Me.btnShow.Text = "显 示"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.BackColor = System.Drawing.Color.White
        Me.ClientSize = New System.Drawing.Size(376, 230)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnShow, Me.btnClear, Me.btnSave})
        Me.Name = "Form1"
        Me.Text = "序列化和反序列化"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private points As New ArrayList()
    Private FileName As String = Application.StartupPath & "\Points.Pnt"

    Private Sub AddPoints()
        Dim i As Integer
        Dim ValueX As Single, ValueY As Single
        For i = 0 To 49
            ValueX = CInt(Int((500 * Rnd()) + 1))
            ValueY = CInt(Int((150 * Rnd()) + 1))
            Console.WriteLine(ValueX)
            Dim p As New CPosition(ValueX, ValueY)
            points.Add(p)
        Next
    End Sub

    Protected Overrides Sub OnPaint(ByVal e As PaintEventArgs)
        Dim g As Graphics = e.Graphics
        Draw(g)
    End Sub

    Private Sub Draw(ByVal g As Graphics)
        Dim i As Integer
        For i = 0 To points.Count - 1
            points(i).Draw(g)
        Next
    End Sub

    Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
        Dim stream As _
            New System.IO.FileStream(FileName, System.IO.FileMode.Create)
        Dim binary As New BinaryFormatter()
        binary.Serialize(stream, points)
        stream.Close()
    End Sub

    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
        Dim g As Graphics = Me.CreateGraphics()
        g.Clear(Color.White)
    End Sub

    Private Sub btnShow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnShow.Click
        Dim stream As New System.IO.FileStream(FileName, _
            System.IO.FileMode.Open)
        Dim binary As New BinaryFormatter()
        points = CType(binary.Deserialize(stream), ArrayList)
        stream.Close()
        Dim g As Graphics = Me.CreateGraphics
        Draw(g)
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        AddPoints()
    End Sub
End Class