Jim Lawrence (AccessD)
accessd at shaw.ca
Mon May 12 04:38:54 CDT 2003
Hi Marcus:
I have been using code like:
Dim rsExpiredCards As New ADODB.Recordset
Set rsExpiredCards = ExpiredCards().Clone
With rsExpiredCards
....
Public Function ExpiredCards() As ADODB.Recordset
Set ExpiredCards = New ADODB.Recordset
..... fill recordset
End function
HTH
Jim
-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Marcus
Tewksbury
Sent: Sunday, May 11, 2003 9:22 PM
To: accessd at databaseadvisors.com
Subject: RE: [AccessD] Classes, Recordsets, and problems inbetween -
SOME PROGRESS
Well - figured out how to get a recordset in, but now, how to get user
defined classes?
Public Sub Load_byInvoiceDetail(ByRef msrst As Variant)
Dim sstrSQL As String
Dim sflgNotFirst As Boolean
Dim xInvoiceDetail As ADODB.Recordset
Set xInvoiceDetail = msrst
Ok - so now I can pass in a recordset as a variant and then cast (sort of) a
local variable to it.
The calling routine looks like...
Dim oOrderDetail As New OrderDetail
oOrderDetail.Load_byInvoiceDetail (oInvoiceDetail.mrstGet()) <- mrstGet
returns the underlying recordset for the class
While Not oOrderDetail.EOF
oOrderDetail.FilledFlag = False
oOrderDetail.MoveNext
Wend
Dim oInventory As New Inventory
oInventory.Load_byOrderDetail (oOrderDetail.mrstGet())
So, while this will work for recordsets - it doesn't for user defined
classes - I still get the same error.
So, should I be making the switch to VB.net?
>From: "Marcus Tewksbury" <tewksbum at hotmail.com>
>Reply-To: accessd at databaseadvisors.com
>To: accessd at databaseadvisors.com
>Subject: RE: [AccessD] Classes, Recordsets, and problems inbetween
>Date: Sun, 11 May 2003 23:11:45 -0500
>
>In this case it seems to be something specifically with recordsets - with
>InvoiceDetail I am only passing in an integer - and I;ve tried New'ing the
>recordset in the initialize - I'll give a look into referencing, but I
>haven't had a problem with any other ADO issue until now!
>
>Ugh - this is frustrating!
>
>
>>From: "Haslett, Andrew" <andrew.haslett at ilc.gov.au>
>>Reply-To: accessd at databaseadvisors.com
>>To: "'accessd at databaseadvisors.com'" <accessd at databaseadvisors.com>
>>Subject: RE: [AccessD] Classes, Recordsets, and problems inbetween
>>Date: Mon, 12 May 2003 13:32:56 +0930
>>
>>lol - we've only finally got overloading and inheritance into VB.Net!
>>Very
>>doubtful we can do that in VBA.
>>
>>I was about to ask if you've tried passing byRef so that ones out the
>>door.
>>
>>Another wild stab -> but I suppose this is still worth asking. Haven't
>>forgot the references to ADO??
>>
>>Perhaps try declaring mrst with a NEW instance:
>>
>>Private mrst As *NEW* ADODB.Recordset
>>
>>...but why would it work for InvoiceDetail and not OrderDetail??
>>
>>Cheers,
>>A
>>
>>-----Original Message-----
>>From: Marcus Tewksbury [mailto:tewksbum at hotmail.com]
>>Sent: Monday, 12 May 2003 1:28 PM
>>To: accessd at databaseadvisors.com
>>Subject: Re: [AccessD] Classes, Recordsets, and problems inbetween
>>
>>
>>Yeap
>>
>>mrst has been declared...
>>
>>Option Compare Database
>>Option Explicit
>>
>>Private mlngInvoiceDetailID As Long
>>Private mlngInvoiceID As Long
>>Private mlngOrderDetailID As Long
>>Private mlngProductID As Long
>>Private mintShipped As Integer
>>Private mintCanceled As Integer
>>Private mintBackOrdered As Integer
>>Private mcurExtendedPrice As Currency
>>Private mflgSubstituteFlag As Boolean
>>Private mdteDateAdded As Date
>>Private mdteLastUpdated As Date
>>Private mflgActiveFlag As Boolean
>>
>>Private mrst As ADODB.Recordset <- Here
>>Private mflgAddFlag As Boolean
>>Private mflgDirtyFlag As Boolean
>>
>>The problem seems to be directly related to passing a recordset into the
>>class - through a sub or function. I've tried making
>>
>>Public Function Load_byInvoiceDetail
>>
>>a sub and function - and have tried passing byVal and ByRef. For testing
>>I
>>changed the paramter to (xrst as ADODB.recordset) and then passed in a
>>newly
>>
>>created, plain recordset and it still bombs.
>>
>>Of course, another question that stems from this - if you look at what my
>>code is trying to accomplish - can you overload the initialize method?
>>That
>>
>>would be helpful!
>>
>>Thanks a million,
>>
>>- Tewks
>>
>>
>>
>>
>>
>> >From: "Michael R Mattys" <michael.mattys at adelphia.net>
>> >Reply-To: accessd at databaseadvisors.com
>> >To: <accessd at databaseadvisors.com>
>> >Subject: Re: [AccessD] Classes, Recordsets, and problems inbetween
>> >Date: Sun, 11 May 2003 23:09:37 -0400
>> >
>> >Marcus,
>> >
>> >Has mrst been set = to an ADO recordset
>> >in the Declarations section?
>> >
>> >Mike Mattys
>> >
>> >----- Original Message -----
>> >From: "Marcus Tewksbury" <tewksbum at hotmail.com>
>> >To: <accessD at databaseadvisors.com>
>> >Sent: Sunday, May 11, 2003 10:48 PM
>> >Subject: [AccessD] Classes, Recordsets, and problems inbetween
>> >
>> >
>> > > Hi everyone,
>> > >
>> > > Ok - here is my issue - I thought I'd be really fancy and start
>> > > encapsulating my tables in data classes - using properites and all
>>that
>> >good
>> > > stuff. One issue that I am having is trying to pass in recordsets
>>(or
>> >other
>> > > classes that also contain recordsets) into a class always gives me a
>> >Type
>> > > Mismatch or 438 error.
>> > >
>> > > The class files and code behind all reside in the same project.
>> > >
>> > > Any thoughts? I'm stumped!
>> > >
>> > >
>> > > Here are 2 snippets
>> > >
>> > > Dim oInvoiceDetail As New InvoiceDetail
>> > > oInvoiceDetail.Load_byInvoiceID (Me.InvoiceID)
>> > >
>> > > Dim oOrderDetail As New OrderDetail
>> > > oOrderDetail.Load_byInvoiceDetail (oInvoiceDetail) <-CRASHES HERE
>> > >
>> > > While Not oOrderDetail.EOF
>> > > oOrderDetail.FilledFlag = False
>> > > oOrderDetail.MoveNext
>> > > Wend
>> > >
>> > > and ...
>> > >
>> > > Public Function Load_byInvoiceDetail(ByVal xInvoiceDetail As
>> >InvoiceDetail)
>> > >
>> > > Dim sstrSQL As String
>> > > Dim sflgNotFirst As Boolean
>> > >
>> > > sstrSQL = "SELECT * FROM OrderDetail"
>> > >
>> > > While Not xInvoiceDetail.EOF
>> > > If Not sflgNotFirst Then
>> > > sstrSQL = sstrSQL + " WHERE OrderDetailID = " &
>> > > xInvoiceDetail!OrderDetailID & ")"
>> > > sflgNotFirst = True
>> > > Else
>> > > sstrSQL = sstrSQL + " OR (OrderDetailID = " &
>> > > xInvoiceDetail!OrderDetailID & ")"
>> > > End If
>> > > xInvoiceDetail.MoveNext
>> > > Wend
>> > >
>> > > With mrst
>> > > .CursorLocation = adUseClient
>> > > .CursorType = adOpenDynamic
>> > > .LockType = adLockBatchOptimistic
>> > > .Source = sstrSQL
>> > > .Open
>> > > End With
>> > >
>> > > Call Scatter
>> > >
>> > > End Function
>> > >
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