Excel VBA UDF在立即窗口中执行，在工作表上失败

Question

UDF“ NAV（）”旨在根据第一个参数（总是一个日期）在网络驱动器上找到正确的报告，然后遍历所有工作表以查找与第二个参数相同的行和与第二个参数相同的列的数据第三个参数（第二个和第三个可以是文本或数字）。

在立即窗口中可靠地工作。 始终返回#VALUE！ 在工作表上使用时，例如= NAV（D7，D8，D9）或= NAV（2/19/2016，“净资产值”，“ 221-I”）。

通常，如果尝试更改UDF中的其他单元格，似乎可以得到这种行为，但是我的函数不这样做。 另外，我相信所有范围引用都指定了哪个工作簿和工作表，因此我也不认为这是问题所在。 我不确定下一步要去哪里。

当无法找到用户要查找的内容时，Function也会尝试通过Outlook通过电子邮件向我发送报告。 我不知道这是否相关。

同样，令人困惑的是，此代码在立即窗口中似乎可以正常工作，但仅给出#VALUE！ 在工作表上使用时。

在下面的代码中，我还能在哪里找到导致NAV（）在立即窗口中正常运行的原因，但始终会产生#VALUE！ 在工作表上使用时？

Option Explicit

Function NAV(ByVal NAVDate As Date, ByVal matchRow As Variant, ByVal matchColumn As Variant) As Variant
'Application.ScreenUpdating = False
Application.Volatile True

    NAV = FindItemOnWorksheet(NAVDate, matchRow, matchColumn)

'Application.ScreenUpdating = True
End Function


Function FindItemOnWorksheet(ByVal NAVDate As Date, ByVal ItemSpecies As Variant, ByVal ItemGenus As Variant) As Variant
' Finds Item by opening NAV workbook with correct date, activating correct worksheet, and searching for correct row and column
Dim startingRange As Range
Dim ws As Worksheet
Dim wb As Workbook
Dim theDate As Date
Dim theItemSpecies As String
Dim theItemGenus As String

theDate = NAVDate
theItemSpecies = ItemSpecies
theItemGenus = ItemGenus

Set wb = GetWB(NAVDate)

'Loop through ws
Dim WS_Count As Integer
Dim i As Integer

WS_Count = wb.Worksheets.Count

For i = 1 To WS_Count


    Set ws = wb.Worksheets(i)
    Set startingRange = ws.Range("A1:Z100")

    Dim theRow As Range
    Dim theColumn As Range

    Set theRow = startingRange.Cells.Find(theItemSpecies, SearchDirection:=xlPrevious, lookat:=xlWhole)
    If Not (theRow Is Nothing) Then
        Set theColumn = startingRange.Cells.Find(theItemGenus, SearchDirection:=xlPrevious, lookat:=xlWhole)
        If Not (theColumn Is Nothing) Then
            FindItemOnWorksheet = ws.Cells(theRow.Row, theColumn.Column).Value

            wb.Close
            Exit Function
        End If
   End If

Next i
'Loop if no hit on either row or column Find()

'following executes only if no match found
MsgBox "No Match Found. Make sure you are entering arguments--" & vbNewLine & _
        "       The Date of NAV, " & vbNewLine & _
        "       the entry found in the right row of NAV workbooks (e.g. 'Net Asset Value'), " & vbNewLine & _
        "       the right column (e.g. 'Fund')." & vbNewLine & _
        " This function will only find exact matches." & vbNewLine & vbNewLine & _
        "Now emailing developer to ask for a fix."

Dim OutApp As Object
Dim OutMail As Object
Dim strbody As String

Set OutApp = CreateObject("Outlook.Application")
Set OutMail = OutApp.CreateItem(0)

strbody = "User attempted" & _
                "=FindItemOnWorksheet( " & theDate & ", " & theItemSpecies & ", " & theItemGenus & " )" & vbNewLine & _
                "theDate type " & TypeName(theDate) & vbNewLine & _
                "theItemSpecies type " & TypeName(theItemSpecies) & vbNewLine & _
                "theItemGenus type " & TypeName(theItemGenus)

On Error Resume Next
With OutMail
    .To = <Address Removed>
    .CC = ""
    .BCC = ""
    .Subject = "FindItemOnWorksheet Error"
    .Body = strbody
    '.Attachments.Add ("C:\file.xlsx")
    .Send
End With
On Error GoTo 0

Set OutMail = Nothing
Set OutApp = Nothing

FindItemOnWorksheet = "Error"
'wb.Close
Exit Function
End Function


Function GetWB(ByVal NAVDate As Date) As Workbook
'Open requested workbook, return to parent procedure

Dim wbPath As String
Dim wbYear As String
Dim wbMonth As String

Dim wbWeek As String

Dim wbFile As String
Dim wbString As String
Dim wb As Workbook
Dim BackADay As Boolean

Dim OriginalNAVDateRequested As Date
OriginalNAVDateRequested = NAVDate

BackADay = True

'Loop through possible file tree structures and dates to find the closest NAV in the past to the date requested.
Do While BackADay = True

    'Don't go back to a previous week if cannot find current NAV
    If OriginalNAVDateRequested - NAVDate > 4 Then
        BackADay = False
    End If

    wbPath = <Network Path Removed>
    wbYear = CStr(Year(NAVDate)) & "\"
    wbMonth = MonthName(Month(NAVDate)) & " " & wbYear

    wbWeek = DateFormat(NAVDate) & "\"

    wbFile = Dir(wbPath & wbYear & wbMonth & wbWeek & "*Valuation Package*.xlsx")

    'Pricings with distributions have differing tree structure
    If wbFile = "" Then
        wbWeek = wbWeek & "POST Distribution " & wbWeek
        wbFile = Dir(wbPath & wbYear & wbMonth & wbWeek & "*Valuation Package*.xlsx")
        If wbFile = "" Then
            NAVDate = NAVDate - 1
        Else: BackADay = False
        End If
    Else: BackADay = False
    End If

Loop

wbString = wbPath & wbYear & wbMonth & wbWeek & wbFile

Set wb = Workbooks.Open(wbString, UpdateLinks:=False, ReadOnly:=True)
Set GetWB = wb

End Function

Function DateFormat(ByVal X As Date) As String
'Appends leading zeroes if needed to achieve form "00" for any two digit integer, and converts to string
Dim MM As String
Dim DD As String
Dim YYYY As String

If Month(X) < 10 Then
    MM = "0" & CStr(Month(X))
Else
    MM = CStr(Month(X))
End If

If Day(X) < 10 Then
    DD = "0" & CStr(Day(X))
Else
    DD = CStr(Day(X))
End If

YYYY = CStr(Year(X))

DateFormat = MM & "." & DD & "." & YYYY

End Function

Answer 1

您可以在Worksheet_Change事件中打开工作簿。

为了演示，如果在Sheet1!A2了更改，Excel将尝试使用该单元格值打开工作簿名称，然后将状态输出到Sheet1!A4 。

放在模块下面：

Option Explicit

Function TryOpenWB(ByVal oItem As Variant) As Variant
    Dim sOut As String
    Dim oWB As Workbook
    On Error Resume Next
    Set oWB = Workbooks.Open(CStr(oItem))
    If oWB Is Nothing Then
        sOut = "Cannot open """ & CStr(oItem) & """"
    Else
        sOut = "Opened """ & CStr(oItem) & """ successfully."
        'oWB.Close
    End If
    TryOpenWB = sOut
End Function

然后在工作表模块下面（我使用Sheet1进行演示）：

Option Explicit

Private Sub Worksheet_Change(ByVal Target As Range)
    If Target.Address = Range("A2").Address Then
        Application.EnableEvents = False
        Range("A4").Value = TryOpenWB(Target)
        Application.EnableEvents = True
    End If
End Sub

因此，此想法是仅在某些单元格地址匹配时才打开工作簿。