[AccessD] Classes, Recordsets, and problems inbetween - SOME PROGRESS

Marcus Tewksbury tewksbum at hotmail.com
Sun May 11 23:22:27 CDT 2003 

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
>> > >
>> > > _________________________________________________________________
>> > > MSN 8 helps eliminate e-mail viruses. Get 2 months FREE*.
>> > > http://join.msn.com/?page=features/virus
>> > >
>> > > _______________________________________________
>> > > AccessD mailing list
>> > > AccessD at databaseadvisors.com
>> > > http://databaseadvisors.com/mailman/listinfo/accessd
>> > > Website: http://www.databaseadvisors.com
>> >
>> >_______________________________________________
>> >AccessD mailing list
>> >AccessD at databaseadvisors.com
>> >http://databaseadvisors.com/mailman/listinfo/accessd
>> >Website: http://www.databaseadvisors.com
>>
>>_________________________________________________________________
>>The new MSN 8: smart spam protection and 2 months FREE*
>>http://join.msn.com/?page=features/junkmail
>>
>>_______________________________________________
>>AccessD mailing list
>>AccessD at databaseadvisors.com
>>http://databaseadvisors.com/mailman/listinfo/accessd
>>Website: http://www.databaseadvisors.com
>>
>>IMPORTANT - PLEASE READ ********************
>>This email and any files transmitted with it are confidential and may
>>contain information protected by law from disclosure.
>>If you have received this message in error, please notify the sender
>>immediately and delete this email from your system.
>>No warranty is given that this email or files, if attached to this
>>email, are free from computer viruses or other defects. They
>>are provided on the basis the user assumes all responsibility for
>>loss, damage or consequence resulting directly or indirectly from
>>their use, whether caused by the negligence of the sender or not.
>>_______________________________________________
>>AccessD mailing list
>>AccessD at databaseadvisors.com
>>http://databaseadvisors.com/mailman/listinfo/accessd
>>Website: http://www.databaseadvisors.com
>
>_________________________________________________________________
>MSN 8 with e-mail virus protection service: 2 months FREE*  
>http://join.msn.com/?page=features/virus
>
>_______________________________________________
>AccessD mailing list
>AccessD at databaseadvisors.com
>http://databaseadvisors.com/mailman/listinfo/accessd
>Website: http://www.databaseadvisors.com

_________________________________________________________________
MSN 8 with e-mail virus protection service: 2 months FREE*  
http://join.msn.com/?page=features/virus

More information about the AccessD mailing list