form1.vb

来自「Source code for VB.NET book - Chapter 2」· VB 代码 · 共 123 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 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 TextBox1 As System.Windows.Forms.TextBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.TextBox1 = New System.Windows.Forms.TextBox
        Me.Button1 = New System.Windows.Forms.Button
        Me.TextBox2 = New System.Windows.Forms.TextBox
        Me.SuspendLayout()
        '
        'TextBox1
        '
        Me.TextBox1.Location = New System.Drawing.Point(24, 32)
        Me.TextBox1.Name = "TextBox1"
        Me.TextBox1.Size = New System.Drawing.Size(72, 20)
        Me.TextBox1.TabIndex = 0
        Me.TextBox1.Text = ""
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(112, 32)
        Me.Button1.Name = "Button1"
        Me.Button1.Size = New System.Drawing.Size(72, 24)
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "转换—>"
        '
        'TextBox2
        '
        Me.TextBox2.Location = New System.Drawing.Point(200, 32)
        Me.TextBox2.Name = "TextBox2"
        Me.TextBox2.Size = New System.Drawing.Size(168, 20)
        Me.TextBox2.TabIndex = 2
        Me.TextBox2.Text = ""
        '
        'Form1
        '
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(384, 118)
        Me.Controls.Add(Me.TextBox2)
        Me.Controls.Add(Me.Button1)
        Me.Controls.Add(Me.TextBox1)
        Me.Name = "Form1"
        Me.Text = "Form1"
        Me.ResumeLayout(False)

    End Sub

#End Region

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        If IsNumeric(TextBox1.Text) Then
            TextBox2.Text = dectobin(TextBox1.Text)
        End If
    End Sub
    Function DecToBin(ByVal inputdata As Double) As String
        Dim Quot, remaind, Newval, Tempval As Double
        Dim binout, Tempstring, Bintemp, Bintemp1, Temp2 As String
        Dim i, PosDot As Integer

        If InStr(1, CStr(inputdata), ".") Then
            MsgBox("只有整数能够被转换", vbCritical)
            GoTo errhandler
        End If
        binout = ""
        Newval = inputdata
doagain:
        Newval = (Newval / 2)
        If InStr(1, CStr(Newval), ".") Then
            binout = binout + "1"
            Newval = Format(Newval, "#0")
            Newval = (Newval - 1)
            If Newval < 1 Then
                GoTo doneit
            End If
        Else
            binout = binout + "0"
            If Newval < 1 Then
                GoTo doneit
            End If
        End If
        GoTo doagain
doneit:
        Bintemp = ""
        For i = Len(binout) To 1 Step -1
            Bintemp1 = Mid(binout, i, 1)
            Bintemp = Bintemp + Bintemp1
        Next i
        binout = Bintemp
        DecToBin = binout
errhandler:
    End Function
End Class