This article discusses both approaches. The sample code presented illustrates how you can transfer an ADO recordset to Excel 97, Excel 2000, Excel 2002, Excel 2003, or Excel 2007.
The code sample uses the Northwind sample database that is included with Microsoft Office. If you selected the default folder when you installed Microsoft Office, the database is located in:
\Program Files\Microsoft Office\Office\Samples\Northwind.mdb
If the Northwind database is located in a different folder on your computer, you need to edit the path of the database in the code provided below.
If you do not have the Northwind database installed on your system, you can use the Add/Remove option for Microsoft Office setup to install the sample databases.
Note The Northwind database is not installed when you install 2007 Microsoft Office. To obtain Northwind 2007, visit the following Microsoft Web site:
Steps to Create Sample
- Start Visual Basic and create a new Standard EXE project. Form1 is created by default.
- Add a CommandButton to Form1.
- Click References from the Project menu. Add a reference to the Microsoft ActiveX Data Objects 2.1 Library.
- Paste the following code into the code section of Form1:
Private Sub Command1_Click()
Dim cnt As New ADODB.Connection
Dim rst As New ADODB.Recordset
Dim xlApp As Object
Dim xlWb As Object
Dim xlWs As Object
Dim recArray As Variant
Dim strDB As String
Dim fldCount As Integer
Dim recCount As Long
Dim iCol As Integer
Dim iRow As Integer
' Set the string to the path of your Northwind database
strDB ="c:\program files\Microsoft office\office11\samples\Northwind.mdb"
' Open connection to the database
cnt.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & strDB & ";"
''When using the Access 2007 Northwind database
''comment the previous code and uncomment the following code.
'cnt.Open "Provider=Microsoft.ACE.OLEDB.12.0;" & _
' "Data Source=" & strDB & ";"
' Open recordset based on Orders table
rst.Open "Select * From Orders", cnt
' Create an instance of Excel and add a workbook
Set xlApp = CreateObject("Excel.Application")
Set xlWb = xlApp.Workbooks.Add
Set xlWs = xlWb.Worksheets("Sheet1")
' Display Excel and give user control of Excel's lifetime
xlApp.Visible = True
xlApp.UserControl = True
' Copy field names to the first row of the worksheet
fldCount = rst.Fields.Count
For iCol = 1 To fldCount
xlWs.Cells(1, iCol).Value = rst.Fields(iCol - 1).Name
' Check version of Excel
If Val(Mid(xlApp.Version, 1, InStr(1, xlApp.Version, ".") - 1)) > 8 Then
'EXCEL 2000,2002,2003, or 2007: Use CopyFromRecordset
' Copy the recordset to the worksheet, starting in cell A2
xlWs.Cells(2, 1).CopyFromRecordset rst
'Note: CopyFromRecordset will fail if the recordset
'contains an OLE object field or array data such
'as hierarchical recordsets
'EXCEL 97 or earlier: Use GetRows then copy array to Excel
' Copy recordset to an array
recArray = rst.GetRows
'Note: GetRows returns a 0-based array where the first
'dimension contains fields and the second dimension
'contains records. We will transpose this array so that
'the first dimension contains records, allowing the
'data to appears properly when copied to Excel
' Determine number of records
recCount = UBound(recArray, 2) + 1 '+ 1 since 0-based array
' Check the array for contents that are not valid when
' copying the array to an Excel worksheet
For iCol = 0 To fldCount - 1
For iRow = 0 To recCount - 1
' Take care of Date fields
If IsDate(recArray(iCol, iRow)) Then
recArray(iCol, iRow) = Format(recArray(iCol, iRow))
' Take care of OLE object fields or array fields
ElseIf IsArray(recArray(iCol, iRow)) Then
recArray(iCol, iRow) = "Array Field"
Next iRow 'next record
Next iCol 'next field
' Transpose and Copy the array to the worksheet,
' starting in cell A2
xlWs.Cells(2, 1).Resize(recCount, fldCount).Value = _
' Auto-fit the column widths and row heights
' Close ADO objects
Set rst = Nothing
Set cnt = Nothing
' Release Excel references
Set xlWs = Nothing
Set xlWb = Nothing
Set xlApp = Nothing
Function TransposeDim(v As Variant) As Variant
' Custom Function to Transpose a 0-based array (v)
Dim X As Long, Y As Long, Xupper As Long, Yupper As Long
Dim tempArray As Variant
Xupper = UBound(v, 2)
Yupper = UBound(v, 1)
ReDim tempArray(Xupper, Yupper)
For X = 0 To Xupper
For Y = 0 To Yupper
tempArray(X, Y) = v(Y, X)
TransposeDim = tempArray
- Press the F5 key to run the project. Form1 appears.
- Click the CommandButton on Form1, and note that the contents of the Orders table is displayed in a new workbook in Excel.
For efficiency and performance, CopyFromRecordset is the preferred method. Because Excel 97 supports only DAO recordsets with CopyFromRecordset, if you attempt to pass an ADO recordset to CopyFromRecordset with Excel 97, you receive the following error:
Class does not support Automation or does not support expected interface.
Note When using CopyFromRecordset, you should be aware that the ADO or DAO recordset you use cannot contain OLE object fields or array data such as hierarchical recordsets. If you include fields of either type in a recordset, the CopyFromRecordset method fails with the following error:
Method CopyFromRecordset of object Range failed.
If Excel 97 is detected, use the GetRows method of the ADO recordset to copy the recordset into an array. If you assign the array returned by GetRows to a range of cells in the worksheet, the data goes across the columns instead of down the rows. For example, if the recordset has two fields and 10 rows, the array appears as two rows and 10 columns. Therefore, you need to transpose the array using your TransposeDim() function before assigning the array to the range of cells. When assigning an array to a range of cells, there are some limitations to be aware of:
The following limitations apply when assigning an array to an Excel Range object:
- The array cannot contain OLE object fields or array data, such as hierarchical recordsets. Notice that the code sample checks for this condition and displays "Array Field" so that the user is made aware that the field cannot be displayed in Excel.
- The array cannot contain Date fields that have a date prior to the year 1900. (See the "References" section for a Microsoft Knowledge Base article link.) Note that the code sample formats Date fields as variant strings to avoid this potential problem.
xlWs.Cells(2, 1).Resize(recCount, fldCount).Value = _
- The array cannot contain an element that is greater than 255 characters.
- The array cannot contain Null values.
- The number of elements in the array cannot exceed 5461.
ID článku: 246335 - Poslední kontrola: 23. 3. 2009 - Revize: 1