mortgage.aspx.vb

来自「Programming Web and Desktop Applications」· VB 代码 · 共 44 行

Public Class WebForm1
    Inherits System.Web.UI.Page
    Protected WithEvents txtPrincipal As System.Web.UI.HtmlControls.HtmlInputText
    Protected WithEvents txtInterestRate As System.Web.UI.HtmlControls.HtmlInputText
    Protected WithEvents txtYears As System.Web.UI.HtmlControls.HtmlInputText
    Protected WithEvents btnSubmit As System.Web.UI.HtmlControls.HtmlInputButton
    Protected WithEvents divResult As System.Web.UI.HtmlControls.HtmlGenericControl

#Region " Web Form Designer Generated Code "

    'This call is required by the Web Form Designer.
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()

    End Sub

    Private Sub Page_Init(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Init
        'CODEGEN: This method call is required by the Web Form Designer
        'Do not modify it using the code editor.
        InitializeComponent()
    End Sub

#End Region

    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        'Put user code to initialize the page here
        If Not Page.IsPostBack Then
            divResult.Visible = False
        Else
            Dim sngPrincipal, sngInterest, sngPayment As Single
            Dim intYears As Integer

            sngPrincipal = CSng(txtPrincipal.Value)
            sngInterest = CSng(txtInterestRate.Value) / 1200
            intYears = CInt(txtYears.Value) * 12

            sngPayment = sngPrincipal * (sngInterest / (1 - (1 + sngInterest) ^ -intYears))

            divResult.Visible = True
            divResult.InnerHtml = "Monthly Payment = " & FormatCurrency(sngPayment)
        End If
    End Sub

End Class