form1.vb

来自「Visual Basic .NET程序设计教程源代码」· VB 代码 · 共 79 行

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 Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.SuspendLayout()
        '
        'Label1
        '
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(216, 136)
        Me.Label1.TabIndex = 0
        Me.Label1.Text = "Label1"
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14)
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label1})
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Label1.Click
        Dim price, qty, total, tax, pay As Integer
        Dim tax_rate As Single
        price = Val(InputBox("请输入单价：", "单价"))
        qty = Val(InputBox("请输入数量：", "数量"))
        total = price * qty
        If total > 100 Then
            tax_rate = 0.05
        Else
            tax_rate = 0
        End If
        tax = total * tax_rate
        pay = total + tax
        Label1.Text = "单价：" & price & vbNewLine
        Label1.Text &= "数量：" & qty & vbNewLine
        Label1.Text &= "-----------" & vbNewLine
        Label1.Text &= "金额：" & total & vbNewLine
        Label1.Text &= "税额：" & tax & vbNewLine
        Label1.Text &= "-----------" & vbNewLine
        Label1.Text &= "总额：" & pay & vbNewLine
    End Sub
End Class