The information in this article applies to:
- Microsoft Visual Basic Standard, Professional, and Enterprise Editions,
16-bit and 32-bit, for Windows, version 4.0
SYMPTOMS
When you try to pass a Recordset object to Microsoft Excel using Automation
from Microsoft Visual Basic 4.0, it fails with one of the following errors:
Run-time error '1004': Cannot find macro '<procedure name>'.
(If you are using Microsoft Excel for Windows 95, version 7.0)
-or-
Run-time error '13': Type Mismatch
(If you are using Microsoft Excel 97)
This article describes how you can work around this limitation and
successfully pass a Recordset to Microsoft Excel.
RESOLUTION
One workaround is to pass the database and Recordset names as string
arguments to an Excel procedure using Automation. The Excel procedure then
creates the Database and Recordset objects and can therefore use
CopyFromRecordset using its own Recordset object.
Another workaround is to copy the Recordset into an array and pass the
array to Excel using Automation. Following is a step-by-step example on how
to do this:
- Start Visual Basic. Form1 is created by default.
- Add a command button to Form1.
- Add a data control and set its properties as follows:
DatabaseName biblio.mdb
RecordSource Authors
- Add the following code to the General Declarations section of Form1:
' User defined type to help determine the
' starting cell in the range receiving the recordset
Option Explicit
Private Type ExlCell
row As Long
col As Long
End Type
Private Sub CopyRecords(rs As Recordset, ws As Object, _
StartingCell As ExlCell)
Dim SomeArray() As Variant
Dim row As Long, col As Long
' You might want to check if rs is not empty
' before re-dimensioning the array
rs.MoveLast
ReDim SomeArray(rs.RecordCount - 1, rs.Fields.Count - 1)
' Copy rs to some array
rs.MoveFirst
For row = 0 To rs.RecordCount - 1
For col = 0 To rs.Fields.Count - 1
SomeArray(row, col) = rs.Fields(col).Value
' Excel will be offended if you try setting one
' of its cells to a NULL
If IsNull(SomeArray(row, col)) Then _
SomeArray(row, col) = ""
Next
rs.MoveNext
Next
' The range should have the same number of
' rows and cols as in the recordset
ws.Range(ws.Cells(StartingCell.row, StartingCell.col), _
ws.Cells(StartingCell.row + rs.RecordCount - 1, _
StartingCell.col + rs.Fields.Count - 1)).Value = SomeArray
End Sub
Private Sub Command1_Click()
Dim stcell As ExlCell
Dim objExlApp As Object
' Get an Excel app object reference
On Error Resume Next
Set objExlApp = GetObject(, "Excel.Application")
' If Excel is not launched start it
If Err = 429 Then
Err = 0
Set objExlApp = CreateObject("Excel.Application")
' Can't create object
If Err = 429 Then
MsgBox Err & ": " & Error
Exit Sub
End If
End If
On Error GoTo 0
' Add a new Workbook
objExlApp.Workbooks.Add
' Select the first sheet
objExlApp.Worksheets("sheet1").Select
' Start fill range at A1
stcell.row = 1
stcell.col = 1
' Call CopyRecords procedure to populate sheet with array
CopyRecords Data1.Recordset, objExlApp.ActiveSheet, stcell
' Show Excel and kill reference
objExlApp.Visible = True
objExlApp.Interactive = True
Set objExlApp = Nothing
End Sub
- Start the project and click the command button. Excel should start
(if it is not already started) and fill the first sheet of a new
workbook with the rows from the Authors table in the biblio.mdb
database.
MORE INFORMATION
When you program in Excel using VBA, the most efficient way to fill a
sheet's range from a Recordset is by using the CopyFromRecordset method.
However, when you try to call the CopyFromRecordset method using Automation
from Visual Basic 4.0, it fails with a run-time error. A workaround would
seem to pass the Recordset object to a procedure in Excel to allow the
Excel procedure to issue the CopyFromRecordset method. However, when you
try to pass the Recordset object to the Excel procedure, it also fails with
a run-time error.
These limitations do not apply when you use Automation between Visual Basic
5.0 and Microsoft Excel 97.