form1.vb

来自「Visual Basic .NET程序设计教程源代码」· VB 代码 · 共 137 行

Imports System.Threading
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 Button1 As System.Windows.Forms.Button
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    Friend WithEvents TextBox3 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button
        Me.Label1 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.TextBox3 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(24, 96)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 0
        Me.Button1.Text = "调用线程"
        '
        'Label1
        '
        Me.Label1.Font = New System.Drawing.Font("宋体", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label1.Location = New System.Drawing.Point(16, 16)
        Me.Label1.Name = "Label1"
        Me.Label1.TabIndex = 1
        Me.Label1.Text = "输入求和的数值"
        '
        'Label2
        '
        Me.Label2.Font = New System.Drawing.Font("宋体", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(134, Byte))
        Me.Label2.Location = New System.Drawing.Point(32, 136)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(72, 23)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "计算结果"
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(136, 16)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.TabIndex = 3
        Me.TextBox1.Text = ""
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(136, 56)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.TabIndex = 4
        Me.TextBox2.Text = ""
        '
        'TextBox3
        '
        Me.TextBox3.Location = New System.Drawing.Point(136, 136)
        Me.TextBox3.Name = "TextBox3"
        Me.TextBox3.TabIndex = 5
        Me.TextBox3.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(292, 173)
        Me.Controls.Add(Me.TextBox3)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.TextBox1)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.Button1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region
    Function sum(ByVal a1 As Single, ByVal a2 As Single) As Single
        Return a1 + a2
    End Function
    Public Class SumClass
        Public a1 As Single
        Public a2 As Single
        Public sum As Single
        Public Event ThreadComplete(ByVal sum As Single)
        Public Sub CalcSum()
            sum = a1 + a2
            RaiseEvent ThreadComplete(sum)
        End Sub
    End Class
    Dim t As Thread
    Dim WithEvents mysum As SumClass
    Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        mysum = New SumClass
        t = New Thread(AddressOf mysum.CalcSum)
        mysum.a1 = TextBox1.Text
        mysum.a2 = TextBox2.Text
        t.Start()
    End Sub
    Sub SumEventHandler(ByVal sum As Single) Handles mysum.ThreadComplete
        TextBox3.Text = sum
    End Sub
End Class