Excel公式如何连接字符串以供外部参考

假设我在单元格中有以下公式，该公式从另一个工作簿读取单元格的值

='c:\temp\[external book.xlsx]SheetX'!$E$4

我想要的值c:\temp\[external book.xlsx]SheetX来自此工作表中的另一个单元格。我将如何重写这个公式来连接这个值和"!$E$4"

可以说细胞A1包含c:\temp\[external book.xlsx]SheetX

EDIT:由于以下内容不适用于封闭的工作簿，因此以下是如何使用 VBA 执行此操作的笨拙概念验证（我想有更好的方法可以做到这一点）：

Sub ClosedWorkbook()

Dim currSht As Worksheet
Dim targetWbk As Workbook
Dim Path As String

' Turn off updating
Application.ScreenUpdating = False

' Set a reference to the current sheet
Set currSht = ActiveWorkbook.ActiveSheet

' Get the value in the formula cell (A1 here, could be ActiveCell if in a loop, etc.)
PathSheet = currSht.Range("A1").Value

' Split out the path - this is very clunky, more of a proof (?) of concept
' This is depends on the path being as you mentioned, and the IF block is to 
' check if the apostrophe is present in the cell (since it is the escape character,
' it is usually skipped)
If Left(PathSheet, 1) = "'" Then
  Path = Replace(Mid(PathSheet, 2, InStr(PathSheet, "]") - 2), "[", "")
  Sheet = Mid(PathSheet, InStr(PathSheet, "]"))
  Sheet = Left(Sheet, Len(Sheet) - 2)
Else
  Path = Replace(Mid(PathSheet, 1, InStr(PathSheet, "]") - 1), "[", "")
  Sheet = Mid(PathSheet, InStr(PathSheet, "]") + 1)
  Sheet = Left(Sheet, Len(Sheet) - 2)
End If

' Open the target workbook
Set targetWbk = Workbooks.Open(Path)

' Grab the value from E4 and drop it in a cell (D1 here, could be ActiveCell, etc.)
MyValue = targetWbk.Sheets(Sheet).Range("E4").Value
currSht.Range("D5").Value = MyValue

' Close the target
targetWbk.Close

Application.ScreenUpdating = True
End Sub

OLD WAY（不适用于封闭的工作簿）

我相信这捕获了您正在寻找的内容。在这个例子中，细胞A1我的工作表路径：

'C:\temp\[externalworkbook.xlsx]Sheet1'!

在单元格 B1 中我有公式：

=INDIRECT(A1 & "$E$4")

将工作表值与$E$4为了生成完整路径，然后将其转换为值INDIRECT。需要注意的一件事：撇号是转义字符，因此根据您的数据，您可能必须在公式中特别考虑它：

=INDIRECT("'" & A1 & "$E$4")

如果您使用的是 Excel 2007 或更高版本，您可以将其包装在IFERROR消除猜测的公式：

=IFERROR(INDIRECT(A1 & "$E$4"),INDIRECT("'" & A1 & "$E$4"))