Creating reports in Excel is a common task and also to retrieve data from databases.
For several reason we may decide to create a standalone reporttool in VB instead of doing it from inside Excel.
When setting up reports with the Pivottable and particular if we want to have the option to update the table ( i e retrieve updated data from the source) we must be aware of that there exist certain limitations to use a classic ADO-approach and therefore are (still) forced to use the ODBC-approach.
Please see Populate pivottables using ADO
In the example early binding is used and therefore it require that we set references to the following library:
* Microsoft Excel 9.0 or later
What we need:
* Microsoft Visual Basic 6.0
* Microsoft Excel 2000 and later
* The example database Northwind.mdb
VB:Option Explicit Dim xlApp As Excel.Application Dim xlWbook As Excel.Workbook Dim xlWSheet As Excel.Worksheet Dim xlptCache As Excel.PivotCache Dim xlptTable As Excel.PivotTable Const stCon As String = "ODBC;DSN=MS Access Database;" & _ "DBQ=C:\Northwind.mdb;DefaultDir=C:\;" & _ "DriverId=25;FIL=MS Access;" & _ "MaxBufferSize=2048;PageTimeout=5;" Const stSQL As String = "SELECT ShipCountry, " & _ "COUNT(Freight) AS [# Of Shipments], " & _ "SUM(Freight) AS [Total Freight] " & _ "FROM Orders " & _ "GROUP BY ShipCountry;" Public Function Create_PivotTable_Report(ByVal stFilename As String) Dim bStarted As Boolean 'If a session of Excel is already running then grab it. On Error Resume Next Set xlApp = GetObject(, "Excel.Application") On Error Goto 0 'Otherwise instantiate a new instance. 'Keep in mind that no active Add-ins will be available unless they are 'of the type COM. If xlApp Is Nothing Then 'Set the flag to remember who have started the session. bStarted = True Set xlApp = New Excel.Application End If 'Create a new workbook with one worksheet only. Set xlWbook = xlApp.Workbooks.Add(xlWBATWorksheet) With xlWbook Set xlWSheet = .Worksheets(1) Set xlptCache = .PivotCaches.Add(SourceType:=xlExternal) End With 'Populate the Pivotcache. With xlptCache .Connection = stCon .CommandText = stSQL .CommandType = xlCmdSql End With 'Create the Pivottable. Set xlptTable = xlWSheet.PivotTables.Add( _ PivotCache:=xlptCache, _ TableDestination:=xlWSheet.Range("D4"), _ TableName:="PT_Report") 'Setup the pivottable. With xlptTable .ManualUpdate = True .PivotFields("ShipCountry").Orientation = xlRowField .PivotFields("# Of Shipments").Orientation = xlDataField .PivotFields("Total Freight").Orientation = xlDataField .Format xlTable2 .ManualUpdate = False .ManualUpdate = True End With 'Save the created workbook. xlWbook.SaveAs stFilename 'If this procedure have started Excel then the UserControl of Excel must be 'set to True and we need to make Excel visible. If bStarted Then With xlApp .Visible = True .UserControl = True End With End If 'Switch to Excel. AppActivate (xlApp) 'Release the objects from memory. Set xlptTable = Nothing Set xlptCache = Nothing Set xlWSheet = Nothing Set xlWbook = Nothing Set xlApp = Nothing End Function
Last edited by XL-Dennis; June 27th, 2005 at 07:54.
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