Excel单位转换解答实例

今天的技巧是群里2位高手帮忙解决一个实际需求。

网友”活塞“ 需求：

要求VBA实现 

作者1：开心-Office中国

解决办法：

Public FactorDic As Object

Public oldValue As String

'初始化系数字典

Sub InitFactor()

    Set FactorDic = CreateObject("Scripting.Dictionary")

    With FactorDic

         .Add "mpa", 1

         .Add "bar", 10

         .Add "psi", 145

         .Add "kpa", 1000

   End With

End Sub

Private Sub Workbook_Open()

    Globals.oldValue = Range("B2")

End Sub

Private Sub Worksheet_Change(ByVal Target As Range)

    If Target.Address <> "$B$2" Then Exit Sub

    Dim val As Double

    val = Range("A2")

    '如果不是数字退出

    If Not VBA.IsNumeric(val) Then Exit Sub

    '如果系数字典为空就初始化系数

    If Globals.FactorDic Is Nothing Then Globals.InitFactor

    '如果旧值等于新值说明没有变更，不进行运算

    If Globals.oldValue = Target.Value Then Exit Sub

    Dim oldFactor, newFactor

    '获取新旧值的系数值

    oldFactor = Globals.FactorDic(Globals.oldValue)

    newFactor = Globals.FactorDic(Target.Value)

    Dim resultValue

    resultValue = val / (VBA.CDbl(oldFactor) / VBA.CDbl(newFactor))

    '关闭事件触发

    Application.EnableEvents = False

    Range("A2") = resultValue

    Globals.oldValue = Target.Value

    Application.EnableEvents = True

End Sub

作者2：Excel小子-Office中国

函数实现的方法