Se vuoi importare molti dati da una cartella di lavoro chiusa, puoi farlo con ADO e la macro qui sotto.

Se si desidera recuperare i dati da un altro foglio di lavoro rispetto al primo foglio di lavoro nella cartella di lavoro chiusa, è necessario fare riferimento a un intervallo denominato definito dall’utente. La macro sottostante può essere utilizzata in questo modo (in Excel 2000 o successivo):

GetDataFromClosedWorkbook "C:\FolderName\WorkbookName.xls", "A1:B21", ActiveCell, False

GetDataFromClosedWorkbook "C:\FolderName\WorkbookName.xls", "MyDataRange", Range ("B3"), True

Sub GetDataFromClosedWorkbook(SourceFile As String, SourceRange As String, _

TargetRange As Range, IncludeFieldNames As Boolean)

' requires a reference to the Microsoft ActiveX Data Objects library

' if SourceRange is a range reference:

'   this will return data from the first worksheet in SourceFile

' if SourceRange is a defined name reference:

'   this will return data from any worksheet in SourceFile

' SourceRange must include the range headers

'

Dim dbConnection As ADODB.Connection, rs As ADODB.Recordset

Dim dbConnectionString As String

Dim TargetCell As Range, i As Integer

dbConnectionString = "DRIVER={Microsoft Excel Driver (*.xls)};" & _

"ReadOnly=1;DBQ=" & SourceFile

Set dbConnection = New ADODB.Connection

On Error GoTo InvalidInput

dbConnection.Open dbConnectionString ' open the database connection

Set rs = dbConnection.Execute("[" & SourceRange & "]")

Set TargetCell = TargetRange.Cells(1, 1)

If IncludeFieldNames Then

For i = 0 To rs.Fields.Count - 1

TargetCell.Offset(0, i).Formula = rs.Fields(i).Name

Next i

Set TargetCell = TargetCell.Offset(1, 0)

End If

TargetCell.CopyFromRecordset rs

rs.Close

dbConnection.Close ' close the database connection

Set TargetCell = Nothing

Set rs = Nothing

Set dbConnection = Nothing

On Error GoTo 0

Exit Sub

InvalidInput:

MsgBox "The source file or source range is invalid!", _

vbExclamation, "Get data from closed workbook"

End Sub

Un altro metodo che non utilizza il metodo CopyFromRecordSet Con la macro sottostante è possibile eseguire l’importazione e avere un migliore controllo sui risultati restituiti dal RecordSet.

Sub TestReadDataFromWorkbook()

' fills data from a closed workbook in at the active cell

Dim tArray As Variant, r As Long, c As Long

tArray = ReadDataFromWorkbook("C:\FolderName\SourceWbName.xls", "A1:B21")

' without transposing

'    For r = LBound(tArray, 2) To UBound(tArray, 2)

'        For c = LBound(tArray, 1) To UBound(tArray, 1)

'            ActiveCell.Offset(r, c).Formula = tArray(c, r)

'        Next c

'    Next r

' with transposing

tArray = Application.WorksheetFunction.Transpose(tArray)

For r = LBound(tArray, 1) To UBound(tArray, 1)

For c = LBound(tArray, 2) To UBound(tArray, 2)

ActiveCell.Offset(r - 1, c - 1).Formula = tArray(r, c)

Next c

Next r

End Sub

Private Function ReadDataFromWorkbook(SourceFile As String, SourceRange As String) As Variant

' requires a reference to the Microsoft ActiveX Data Objects library

' if SourceRange is a range reference:

'   this function can only return data from the first worksheet in SourceFile

' if SourceRange is a defined name reference:

'   this function can return data from any worksheet in SourceFile

' SourceRange must include the range headers

' examples:

' varRecordSetData = ReadDataFromWorkbook("C:\FolderName\SourceWbName.xls", "A1:A21")

' varRecordSetData = ReadDataFromWorkbook("C:\FolderName\SourceWbName.xls", "A1:B21")

' varRecordSetData = ReadDataFromWorkbook("C:\FolderName\SourceWbName.xls", "DefinedRangeName")

Dim dbConnection As ADODB.Connection, rs As ADODB.Recordset

Dim dbConnectionString As String

dbConnectionString = "DRIVER={Microsoft Excel Driver (*.xls)};ReadOnly=1;DBQ=" & SourceFile

Set dbConnection = New ADODB.Connection

On Error GoTo InvalidInput

dbConnection.Open dbConnectionString ' open the database connection

Set rs = dbConnection.Execute("[" & SourceRange & "]")

On Error GoTo 0

ReadDataFromWorkbook = rs.GetRows ' returns a two dim array with all records in rs

rs.Close

dbConnection.Close ' close the database connection

Set rs = Nothing

Set dbConnection = Nothing

On Error GoTo 0

Exit Function

InvalidInput:

MsgBox "The source file or source range is invalid!", vbExclamation, "Get data from closed workbook"

Set rs = Nothing

Set dbConnection = Nothing

End Function

L’esempio di macro presuppone che il progetto VBA abbia aggiunto un riferimento alla libreria di oggetti ADO.

Puoi farlo dall’interno del VBE selezionando il menu Strumenti, Riferimenti e selezionando Microsoft ActiveX Data Objects x.x Object Library.

Usa ADO se puoi scegliere tra ADO e DAO per l’importazione o l’esportazione dei dati.