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AccessTr.neT


"Dcount" bazen boş hücreleri de neden sayıyor ki!

"Dcount" bazen boş hücreleri de neden sayıyor ki!

Çözüldü #2
Gelişmiş DCount olarak tavsiye edilen ECount u
bir denermisiniz ?
Bu kodu modüle olarak kayıt edin sonra Dcount
yerine kodunuzda ECoun kullanın

Kod:
Public Function ECount(Expr As String, Domain As String, Optional Criteria As String, Optional bCountDistinct As Boolean) As Variant
On Error GoTo Err_Handler
    'Purpose:   Enhanced DCount() function, with the ability to count distinct.
    'Return:    Number of records. Null on error.
    'Arguments: Expr           = name of the field to count. Use square brackets if the name contains a space.
    '           Domain         = name of the table or query.
    '           Criteria       = any restrictions. Can omit.
    '           bCountDistinct = True to return the number of distinct values in the field. Omit for normal count.
    'Notes:     Nulls are excluded (whether distinct count or not.)
    '           Use "*" for Expr if you want to count the nulls too.
    '           You cannot use "*" if bCountDistinct is True.
    'Examples:  Number of customers who have a region: ECount("Region", "Customers")
    '           Number of customers who have no region: ECount("*", "Customers", "Region Is Null")
    '           Number of distinct regions: ECount("Region", "Customers", ,True)
    Dim DB As DAO.Database
    Dim rs As DAO.Recordset
    Dim strSql As String

    'Initialize to return Null on error.
    ECount = Null
    Set DB = DBEngine(0)(0)

    If bCountDistinct Then
        'Count distinct values.
        If Expr <> "*" Then             'Cannot count distinct with the wildcard.
            strSql = "SELECT " & Expr & " FROM " & Domain & " WHERE (" & Expr & " Is Not Null)"
            If Criteria <> vbNullString Then
                strSql = strSql & " AND (" & Criteria & ")"
            End If
            strSql = strSql & " GROUP BY " & Expr & ";"
            Set rs = DB.OpenRecordset(strSql)
            If rs.RecordCount > 0& Then
                rs.MoveLast
            End If
            ECount = rs.RecordCount     'Return the number of distinct records.
            rs.Close
        End If
    Else
        'Normal count.
        strSql = "SELECT Count(" & Expr & ") AS TheCount FROM " & Domain
        If Criteria <> vbNullString Then
            strSql = strSql & " WHERE " & Criteria
        End If
        Set rs = DB.OpenRecordset(strSql)
        If rs.RecordCount > 0& Then
            ECount = rs!TheCount        'Return the count.
        End If
        rs.Close
    End If

Exit_Handler:
    Set rs = Nothing
    Set DB = Nothing
    Exit Function

Err_Handler:
    MsgBox Err.Description, vbExclamation, "ECount Error " & Err.Number
    Resume Exit_Handler
End Function

Selamlar
okileturc, 18-03-2009 tarihinden beri AccessTr.neT üyesidir.
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Cvp: "Dcount" bazen boş hücreleri de neden sayıyor ki! - Yazar: okileturc - 24/03/2009, 21:39
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