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Thread: Creating PivotTable-reports from VB 6.0

  1. #1
    Join Date
    25th January 2003
    Location
    Ístersund, Sweden
    Posts
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    Creating PivotTable-reports from VB 6.0

    Hi all,

    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 08:54.
    Kind regards,
    Dennis

    .NET & Excel | 2nd edition PED | MVP

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