vb.net - 等价于 VB.Net 中的货币？

Question

我正在将应用程序从 VB6 迁移到使用货币类/结构的 VB.Net。我的问题是:在以下代码中，哪个是 VB6 Currency 的“等价物”？

Public Function getTimeElapsed() As Double

    Dim cuStart As Currency
    Dim cuStop As Currency
    Dim cuFreq As Currency
    Dim v As Double
    Dim ReturnValue As Double

    QueryPerformanceFrequency(liFrequency)

    cuStart = LargeIntToCurrency(liStart)
    cuStop = LargeIntToCurrency(liStop)
    cuFreq = LargeIntToCurrency(liFrequency)
    ' elapsed time
    v = CDbl(cuStop - cuStart) / CDbl(cuFreq)
    Select Case ResultUnit
        Case CounterUnit.Second
            ReturnValue = v
        Case CounterUnit.Millisecond
            ReturnValue = v * 1000.0#
        Case CounterUnit.microsecond
            ReturnValue = v * 1000000.0#
        Case CounterUnit.nanosecond
            ReturnValue = v * 1000000000.0#
    End Select
    Return ReturnValue
End Function
Private Function LargeIntToCurrency(liInput As LARGE_INTEGER) As Currency
    CopyMemory(LargeIntToCurrency, liInput, Strings.Len(liInput))
    LargeIntToCurrency = LargeIntToCurrency * 10000
End Function

'Currency' 在 VB.Net 中给出这样的错误。是否有任何缺少的库？

Answer 1

表示货币的数据应在 VB.NET 中存储为 Decimal 值。它不像 Double 那样容易出现舍入错误。