Re: .BOF and .EOF are lying!


"An OpenRecordset method internally invokes a MoveFirst
"method. Therefore, using an OpenRecordset method on an
"empty set of records sets the BOF and EOF properties to
"True.

AFAIK, nothing that doesn't invoke a Move method sets
the BOF or EOF properties.

For example

"Any Delete method, even if it removes the only remaining
"record from a Recordset, won't change the setting of the
"BOF or EOF property.

You might read that

"When you use Requery, the first record in the Recordset
"becomes the current record.

and

"If both the BOF and EOF property settings of the Recordset
"object are True after you use the Requery method, the query
"didn't return any records and the Recordset contains no data.

But if you read more carefully, you will notice that in
some cases "the Recordset is re-created from scratch.",
and in other cases "the Recordset is re-populated"


> the recordset's data (by a requery?) and then the "failure" occurs. Most
> likely, the "failure" is because the refresh/requery has put you at a
> different place in the recordset than where you thought you were?

No, the "failure" is because the BOF and EOF properties are
not set at all by some actions.

(david)


"Ken Snell [MVP]" <kthsneisllis9@xxxxxxxxxxxxxxxxxx> wrote in message
news:e$8ACG6oFHA.2916@xxxxxxxxxxxxxxxxxxxxxxx
> You haven't shown us the specific circumstance when the BOF and EOF
> properties "fail", but from your posts it appears that you are refreshing
> the recordset's data (by a requery?) and then the "failure" occurs. Most
> likely, the "failure" is because the refresh/requery has put you at a
> different place in the recordset than where you thought you were?
>
> I use BOF and EOF regularly with recordsets -- both those opened in code
> and those for forms' recordset or recordsetclone. I have not have any
> difficulty with either.
>
> If you can post a specific example of what you are seeing (code and
> example data), I'm sure we can assist you.
>
> By the way, although the RecordCount of the form's recordset often can
> mislead you because it doesn't have the "correct" count unless you do a
> .MoveLast, the form's RecordsetClone.RecordCount property has always had a
> correct count for me without having to use .MoveLast.
>
> --
>
> Ken Snell
> <MS ACCESS MVP>
>
> --
>
> Ken Snell
> <MS ACCESS MVP>
>
>
>
> "Laurel" <FakeMail@xxxxxxxxxxx> wrote in message
> news:uRoQsM4oFHA.2792@xxxxxxxxxxxxxxxxxxxxxxx
>> See below
>>
>> "david epsom dot com dot au" <david@epsomdotcomdotau> wrote in message
>> news:ufE6TO3oFHA.3256@xxxxxxxxxxxxxxxxxxxxxxx
>>>> you can't trust .recordcount until you've done a .movelast.
>>>
>>> No, but I've always had > 0
>>>
>>>> Before moving to the last record, sometimes the record count is 0.
>>
>> Well, you may be on to something. I went back to a form where I thought
>> I was getting 0 instead of the full count, but it turns out it was 1. So
>> I'll give .RecordCount = 0 a try.
>>
>>>
>>> Ok, I've never seen that.
>>>
>>>> I'm not using a record clone.
>>>
>>> What /ARE/ you doing?
>>
>>
>> For forms
>> Me.Recordset.RecordCount
>> or Me.Recordset.Bof, .EOF
>>
>> or, sometimes
>> Dim lrst_Me As Recordset
>> Set lrst_Me = Me.Recordset
>>
>> Very often I'm dealing with a recordset created this way:
>> Set irst_ClassPeriods = CurrentDb.OpenRecordset(ls_sql)
>>
>>
>>
>>>
>>>>>> retrieval arguments? If I retrieve the data in the form and rows,
>>>>>> and then I change the values that are used as arguments
>>>
>>> What are you testing for BOF and EOF? Forms don't have a BOF
>>> or EOF parameter. Please show your code.
>>
>> Me.Recordset.EOF
>>
>>>
>>> (david)
>>>
>>>
>>>
>>> "Laurel" <FakeMail@xxxxxxxxxxx> wrote in message
>>> news:OA88ms1oFHA.3036@xxxxxxxxxxxxxxxxxxxxxxx
>>>>I got into testing .bof and .eof because I learned that you can't trust
>>>>.recordcount until you've done a .movelast. (And I have confirmed this
>>>>myself.... several times... Before moving to the last record, sometimes
>>>>the record count is 0. Sometimes it is the unfiltered count, etc.)
>>>>Anyway, testing for .eof and .bof was a way of avoiding an error when
>>>>.movelast was attempted on an empty recordset.
>>>>
>>>> So here we are coming around the circle again....
>>>>
>>>>
>>>> "david epsom dot com dot au" <david@epsomdotcomdotau> wrote in message
>>>> news:uFNp6bvoFHA.2580@xxxxxxxxxxxxxxxxxxxxxxx
>>>>> Use .recordcount > 0 to check if the recordset is empty.
>>>>> Then use move or find if you want to position at a record.
>>>>>
>>>>> Remember that by definition .RecordsetClone is a recordset
>>>>> with different record pointers than those used by the form.
>>>>>
>>>>> Ignore whatever the help files say about .bof and .eof
>>>>> for recordset clones: The help was never correct.
>>>>>
>>>>> (david)
>>>>>
>>>>> "Laurel" <FakeMail@xxxxxxxxxxx> wrote in message
>>>>> news:OISvtztoFHA.2580@xxxxxxxxxxxxxxxxxxxxxxx
>>>>>> Are there steps one should take before requerying a form with
>>>>>> different retrieval arguments? If I reetrieve the data in the form
>>>>>> and there are rows, and then I change the values that are used as
>>>>>> arguments to something that would return no rows .EOF and .BOF are
>>>>>> both false.
>>>>>>
>>>>>> If the arguemtns that would return no rows are used first, .bof and
>>>>>> .eof are true as one would expect.
>>>>>>
>>>>>> Any suggestions?
>>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>


.

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