ActiveSheet.Cells(Range("C8").Row, Columns.Count).End(xlToLeft).Offset(0, 1) = GetValueFromClosedWorkbook(p, f, s, a)
要检查单元格是否为空，您必须使用“COUNTA(range)”之类的公式作为ExecuteExcel4Macro(arg) 方法的参数，并取回关闭的工作簿指定范围内的非空单元格数。
如果您将单元格地址指定为其范围并且它返回零，则该单元格为空，否则它有一个值，然后您可以再次使用 ExecuteExcel4Macro(arg) 方法并将单元格引用作为其参数。在后一种情况下，您可能希望在原始“范围”上使用 .Offset(rowOffset) 方法来转移到与其分开的单元格 rowOffset 行。
为了不迷失在引用中，我建议你重构你的代码并广泛使用“包装器”，以便拥有干净的可维护代码
根据我的理解，你可以在这里找到我想出的东西
Sub TestGetValueFromClosedWorkbook()
Dim p As String, f As String
Dim s As String, a As String
Dim argPart As String
Dim var As Variant
Dim checkSheetResult As String
p = ThisWorkbook.path
f = "reportPageImpression.xlsx"
s = "report_page_impression"
a = "D39"
checkSheetResult = CheckSht(p, f) ' check if the file to be read as closed is not already opened and if it exists
If checkSheetResult = "" Then
argPart = "'" & p & "[" & f & "]" & s & "'!" 'set the "constant" part of the argument
var = GetFirstNonEmptyValueFromClosedWorkbook(a, argPart, -1)
If var = -1 Then
MsgBox ("No value found!")
Else
ActiveSheet.Cells(Range("C8").row, Columns.Count).End(xlToLeft).Offset(0, 1) = var
End If
Else
MsgBox checkSheetResult
End If
End Sub
Private Function GetFirstNonEmptyValueFromClosedWorkbook(ref As String, argPart As String, Optional rowOffsetRate As Variant) As Variant
Dim arg As String, funcArg As String
Dim var As Variant
Dim rowOffset As Long
If IsMissing(rowOffsetRate) Then rowOffsetRate = 0
rowOffset = 0
funcArg = SetArgFunction(ref, argPart, rowOffset, arg)
var = ExecuteExcel4Macro(funcArg)
Do While var = -1 And CheckIfOffset(ref, CLng(rowOffsetRate), rowOffset)
funcArg = SetArgFunction(ref, argPart, rowOffset, arg)
var = ExecuteExcel4Macro(funcArg)
Loop
If var <> -1 Then var = ExecuteExcel4Macro(arg)
GetFirstNonEmptyValueFromClosedWorkbook = var
End Function
Private Function SetArgFunction(ref As String, argPart As String, rowOffset As Long, arg As String) As String
arg = argPart & Range(ref).Range("A1").Offset(rowOffset).Address(, , xlR1C1)
SetArgFunction = "IF(COUNTA(" & arg & ")>0,1,-1)"
End Function
Private Function CheckIfOffset(ref As String, rowOffsetRate As Long, rowOffset As Long) As Boolean
Dim nextRow As Long
Dim cell As Range
Set cell = Range(ref)
nextRow = cell.Offset(rowOffset).row + rowOffsetRate
CheckIfOffset = rowOffsetRate > 0 And nextRow <= cell.Parent.Cells(cell.Parent.Rows.Count, 1).row _
Or (rowOffsetRate < 0 And nextRow > 0)
If CheckIfOffset Then rowOffset = rowOffset + rowOffsetRate
End Function
Private Function CheckSht(path As String, file As String) As String
Dim wb As Workbook
Dim okSheet As Boolean
If Right(path, 1) <> "\" Then path = path & "\"
On Error Resume Next
Set wb = Workbooks(file)
On Error GoTo 0
okSheet = wb Is Nothing
If Not okSheet Then okSheet = wb.path & "\" <> path
If Not okSheet Then
' file is already open
CheckSht = "workbook:" & vbCrLf & vbCrLf & file & vbCrLf & vbCrLf & "in:" & vbCrLf & vbCrLf & path & vbCrLf & vbCrLf & "is already open!"
Else
'Let’s check whether the file exists
If Dir(path & file) = "" Then CheckSht = "workbook:" & vbCrLf & vbCrLf & file & vbCrLf & vbCrLf & "in:" & vbCrLf & vbCrLf & path & vbCrLf & vbCrLf & "not found!"
End If
End Function
转移到不同单元格的“逻辑”全部在var = GetFirstNonEmptyValueFromClosedWorkbook(a, argPart, -1) 中，其中-1 是GetFirstNonEmptyValueFromClosedWorkbook(ref As String, argPart As String, Optional rowOffsetRate As Variant) As Variant 函数在地址a 中的单元格为空时考虑的“rowOffsetRate”。如果没有传递“rowOffsetRate”，那么它只检查地址a中的单元格