looping through recordset


M

Mark

Hi all,

What would be an efficient way within a function to loop through a recordset
of distinct text values (record 1 = text1, record 2 = text2, etc.) with the
result displayed as follows:

If only one record:
fncMyFunction = "text1." (that's text1 followed by a period)

If multiple records and rst.recordcount = n:
fncMyFunction = "text1, text2, ... , and text-n." (commas separate each
record except for the last which is preceded with the word "and" and is
followed by a period).

[the function produces a string which can be incorporated elsewhere]

Thanks for any advice.
Mark
 
Ad

Advertisements

J

Jeff Boyce

Mark

"looping through a recordset" is a very compute-intensive way to get things
done... sometimes the only way, but then again ...

Have you looked into using a query to process the recordset as a set?

Regards

Jeff Boyce
Microsoft Office/Access MVP
 
M

Mark

Thanks, Jim.
I'll have to work through this. I haven't used 'Wend' before, but I would
have expected the line:
YourFunction = YourFunction & rst!FieldName
to have come earlier in the procedure. For example, I can't see where
YourFunction has been changed from "vbnullstring" in the case where there's
only one record --
if recordNumber > 1 then
if recordNumber = myCOunt then
YourFunction = YourFunction & "and "
else
YourFunction = YourFunction & ", "
.... where does the value of YourFunction come from on the last line above?

Thanks for your help.
P. S. I'm using DAO (Access97 & 2002), but I can adjust as needed.
Mark

JimBurke via AccessMonster.com said:
I don;t know if you want to pass the recordset to the function or just open
in the function. I'll code this to open it in the function. I'm setting it up
for ADO - the OpenKeyset parm allows you to access the record count.
Depending on how you open a recordset, you may or may not be able to get a
valid recordcount. This can also be done using a DAO recordset, but I'm not
sure about how you get the recordcount with DAO. I'm calling it
'YourFunction' - rename it to what you want and replace 'YourFunction' with
the name you give it. Also make sure you fill in the field name that has the
text value where noted. Something like this should work:

Public Function YourFunction() as string
on error goto HandleError

dim rst as ADODB.Recordset
dim myRecordCount as long
dim recordNumber as long

YourFunction = vbnullstring
set rst = New ADODB.Recordset
rst.Open "YourTableName", cn, adOpenKeyset, adLockOptimistic
if rst.eof then
msgbox "No records were found. - or whatever message you'd want here"
set rst = nothing
exit function
end if

rst.movelast
rst.movefirst
myCount = rst.recordcount
recordNumber = 0

while not rst.eof
recordNumber = recordNumber + 1
if recordNumber > 1 then
if recordNumber = myCOunt then
YourFunction = YourFunction & "and "
else
YourFunction = YourFunction & ", "
end if
end if
YourFunction = YourFunction & rst!FieldName ' change this to the
field name!
rst.movenext
wend
rst.close
set rst = nothing
exit function

HandleError:
' do whatever you want inc ase of an error here - display msgbox, etc

End Function
Hi all,

What would be an efficient way within a function to loop through a recordset
of distinct text values (record 1 = text1, record 2 = text2, etc.) with the
result displayed as follows:

If only one record:
fncMyFunction = "text1." (that's text1 followed by a period)

If multiple records and rst.recordcount = n:
fncMyFunction = "text1, text2, ... , and text-n." (commas separate each
record except for the last which is preceded with the word "and" and is
followed by a period).

[the function produces a string which can be incorporated elsewhere]

Thanks for any advice.
Mark
 
M

Mark

Jeff,
Not sure I understand the question. Are you suggesting an expression in a
query? Maybe I've used the wrong language -- "recordset", or just didn't
explain very well what I'm trying to do.
Mark

Jeff Boyce said:
Mark

"looping through a recordset" is a very compute-intensive way to get things
done... sometimes the only way, but then again ...

Have you looked into using a query to process the recordset as a set?

Regards

Jeff Boyce
Microsoft Office/Access MVP

Mark said:
Hi all,

What would be an efficient way within a function to loop through a
recordset
of distinct text values (record 1 = text1, record 2 = text2, etc.) with
the
result displayed as follows:

If only one record:
fncMyFunction = "text1." (that's text1 followed by a period)

If multiple records and rst.recordcount = n:
fncMyFunction = "text1, text2, ... , and text-n." (commas separate each
record except for the last which is preceded with the word "and" and is
followed by a period).

[the function produces a string which can be incorporated elsewhere]

Thanks for any advice.
Mark
 
J

Jeff Boyce

Mark

"how" depends on "what", and I don't understand what (data, or data/table
structure) you are working with.

I asked whether you considered using a query to see if you had considered
using a query ... and I don't know if it is appropriate because I don't know
enough about your situation yet.

Regards

Jeff Boyce
Microsoft Office/Access MVP


Mark said:
Jeff,
Not sure I understand the question. Are you suggesting an expression in a
query? Maybe I've used the wrong language -- "recordset", or just didn't
explain very well what I'm trying to do.
Mark

Jeff Boyce said:
Mark

"looping through a recordset" is a very compute-intensive way to get things
done... sometimes the only way, but then again ...

Have you looked into using a query to process the recordset as a set?

Regards

Jeff Boyce
Microsoft Office/Access MVP

Mark said:
Hi all,

What would be an efficient way within a function to loop through a
recordset
of distinct text values (record 1 = text1, record 2 = text2, etc.) with
the
result displayed as follows:

If only one record:
fncMyFunction = "text1." (that's text1 followed by a period)

If multiple records and rst.recordcount = n:
fncMyFunction = "text1, text2, ... , and text-n." (commas separate each
record except for the last which is preceded with the word "and" and is
followed by a period).

[the function produces a string which can be incorporated elsewhere]

Thanks for any advice.
Mark
 
Ad

Advertisements

F

FPS, Romney

Oops, my apologies, Jim ... I did misread the code. Thank you for your help!
Mark
JimBurke via AccessMonster.com said:
One thing I did forget - right after the Wend you need this:

YourFunction = YourFunction & "."

to add the period at the end

Thanks, Jim.
I'll have to work through this. I haven't used 'Wend' before, but I would
have expected the line:
YourFunction = YourFunction & rst!FieldName
to have come earlier in the procedure. For example, I can't see where
YourFunction has been changed from "vbnullstring" in the case where there's
only one record --
if recordNumber > 1 then
if recordNumber = myCOunt then
YourFunction = YourFunction & "and "
else
YourFunction = YourFunction & ", "
... where does the value of YourFunction come from on the last line above?

Thanks for your help.
P. S. I'm using DAO (Access97 & 2002), but I can adjust as needed.
Mark
I don;t know if you want to pass the recordset to the function or just open
in the function. I'll code this to open it in the function. I'm setting
it up
[quoted text clipped - 67 lines]
Thanks for any advice.
Mark
 
Ad

Advertisements


Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Top