VBA UDF 返回#VALUE！

Question

所以我有一个用 Visual Basic 编写的非常简单的 UDF，可以在 excel 中使用。它计算你的大约。税收。假设我这样使用它：

=Taxes(I23-I18,I24-I20,"Married")

如果我输入这个，效果很好。现在，如果我保存工作表并重新启动 excel，单元格现在会显示 #VALUE！如果我选择公式并再次按回车键，它会重新计算它。我究竟做错了什么？ Application.Volatile 不应该是必需的，但我正在尝试想法......

Private Type TaxBracket
    Perc As Double
    Floor As Currency
    Limit As Currency
End Type

Public Function Taxes(gross1 As Currency, gross2 As Currency, filingStatus As String) As Currency
    Application.Volatile True
    Dim brackets(6) As TaxBracket
    Dim stdDeduction As Currency
    Dim ssTaxRate As Double
    Dim medicareTaxRate As Double
    Dim Tax As Double

    stdDeduction = 5700
    ssTaxRoof = 106800
    ssTaxRate = 0.062
    medicareTaxRate = 0.0145

    Tax = medicareTaxRate * (gross1 + gross2)
    Tax = Tax + IIf(gross1 < ssTaxRoof, ssTaxRate * gross1, ssTaxRate * ssTaxRoof)
    Tax = Tax + IIf(gross2 < ssTaxRoof, ssTaxRate * gross2, ssTaxRate * ssTaxRoof)

    brackets(0).Perc = 0.1
    brackets(1).Perc = 0.15
    brackets(2).Perc = 0.25
    brackets(3).Perc = 0.28
    brackets(4).Perc = 0.33
    brackets(5).Perc = 0.35

    If filingStatus = "Single" Then
        brackets(0).Floor = 0
        brackets(1).Floor = 8375
        brackets(2).Floor = 34000
        brackets(3).Floor = 82400
        brackets(4).Floor = 171850
        brackets(5).Floor = 373650
        brackets(0).Limit = 8375
        brackets(1).Limit = 34000
        brackets(2).Limit = 82400
        brackets(3).Limit = 171850
        brackets(4).Limit = 373650
        brackets(5).Limit = 1000000000

        Tax = Tax + incomeTaxes(gross1, brackets, stdDeduction) + incomeTaxes(gross2, brackets, stdDeduction)
    ElseIf filingStatus = "Married" Then
        brackets(0).Floor = 0
        brackets(1).Floor = 16750
        brackets(2).Floor = 68000
        brackets(3).Floor = 137300
        brackets(4).Floor = 209250
        brackets(5).Floor = 373650
        brackets(0).Limit = 16750
        brackets(1).Limit = 68000
        brackets(2).Limit = 137300
        brackets(3).Limit = 209250
        brackets(4).Limit = 373650
        brackets(5).Limit = 1000000000

        Tax = Tax + incomeTaxes(gross1 + gross2, brackets, stdDeduction * 2)
    Else
        Taxes = "N/A"
        Return
    End If
    Taxes = Tax
End Function

Private Function incomeTaxes(gross As Currency, brackets() As TaxBracket, deduction As Currency) As Currency
    Dim Tax As Double
    Dim taxable As Double

    Tax = 0
    taxable = gross - deduction


    For i = 0 To 5
      If taxable > brackets(i).Limit Then
        Tax = Tax + (WorksheetFunction.Min(taxable, brackets(i).Limit) - brackets(i).Floor) * brackets(i).Perc
      Else
        If taxable > brackets(i).Floor Then
            Tax = Tax + (taxable - brackets(i).Floor) * brackets(i).Perc
        Else
            'tax = tax
        End If
      End If
    Next i

    incomeTaxes = Tax
End Function

Answer 1

您的 UDF 看起来不错，除了使用货币数据类型（可能应该使用双精度或变体，因为 Excel 使用的是这种类型）。
使用 UDF 获取 #Value 的通常原因是输入参数之一无法转换为正确的类型。如果您的输入单元格在工作簿打开时不包含数值，您将获得 #Value。
这可能是由计算顺序问题引起的，导致第一次调用该函数时未计算上游先例单元格之一。
尝试将输入参数声明为变量而不是货币，并添加一些临时 debug.print 语句以在即时窗口中显示输入参数。