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Filters
Posted on 1999-01-18
I have a form in VB5 and I want to filter on 4 of the fields on the form could be all the 4 or only one of them. These fields read from a recordset so the final result when I browse through, iwill only see these filtered records.
thank you
thank you
[X]
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8 Comments
Put a button on the form that triggers the lookup. When it does, simply build your query to match.
In this example a build a query based on the assumption that two fields are filled in. Then I test to see if one or the other field has been left blank and adjust my query accordingly. Finally I run the query and check to make sure that at least one record has been returned. My table is called RESULTS and there are at least two fields, CLIENT and DEBTOR. My form has a pair of text boxes CLIENT and DEBTOR. My database, DB, is already standing open.
SortKey = "select * from results where client like '" & client.Text & "*' or debtor=" & debtor.Text
If Len(debtor.Text) < 1 Then SortKey = "select * from results where client like '" & client.Text & "*'"
If Len(client.Text) < 1 Then SortKey = "select * from results where debtor=" & debtor.Text
'
Set rs = db.OpenRecordset(SortKey)
If rs.BOF And rs.EOF Then GoTo isempty
In this example a build a query based on the assumption that two fields are filled in. Then I test to see if one or the other field has been left blank and adjust my query accordingly. Finally I run the query and check to make sure that at least one record has been returned. My table is called RESULTS and there are at least two fields, CLIENT and DEBTOR. My form has a pair of text boxes CLIENT and DEBTOR. My database, DB, is already standing open.
SortKey = "select * from results where client like '" & client.Text & "*' or debtor=" & debtor.Text
If Len(debtor.Text) < 1 Then SortKey = "select * from results where client like '" & client.Text & "*'"
If Len(client.Text) < 1 Then SortKey = "select * from results where debtor=" & debtor.Text
'
Set rs = db.OpenRecordset(SortKey)
If rs.BOF And rs.EOF Then GoTo isempty
thanks,
As my knowledge is ltd, I can understand that the sql makes the filter, but how can I browse thru the filtered records of the results table or the query.
As my knowledge is ltd, I can understand that the sql makes the filter, but how can I browse thru the filtered records of the results table or the query.
You can load them in a control or show them one at a time with an entry screen type of page. Simply copy the contents of each field into a TextBox's .Text property. Put a couple of buttons on the page, [Next] and [Prev]. Have them perform a .MoveNext and .MovePrev in the filtered data set and then call the sub to load the current record onto the screen. Be sure to check .EOF and .BOF prior to call to prevent "No Current Record" errors.
PRIVATE SUB Btn_Next_Click()
rs.MoveNext
if rs.EOF then
call clearpage
Btn_Next.Enabled = False
else
call showrecord
endif
END SUB
PRIVATE SUB Btn_Prev_Click()
rs.MovePrev
if rs.EOF then
call clearpage
Btn_Prev.Enabled = False
else
call showrecord
endif
END SUB
PRIVATE SUB ShowRecord()
for ndx = 1 to Text1.Ubound
Text1(ndx).Text = ""
next ndx
'
text1(1).Text = rs![field 1]
.
END SUB
M
PRIVATE SUB Btn_Next_Click()
rs.MoveNext
if rs.EOF then
call clearpage
Btn_Next.Enabled = False
else
call showrecord
endif
END SUB
PRIVATE SUB Btn_Prev_Click()
rs.MovePrev
if rs.EOF then
call clearpage
Btn_Prev.Enabled = False
else
call showrecord
endif
END SUB
PRIVATE SUB ShowRecord()
for ndx = 1 to Text1.Ubound
Text1(ndx).Text = ""
next ndx
'
text1(1).Text = rs![field 1]
.
END SUB
M
Thanks,
I managed to filter & view records, but if I want to make a new search, I need to cancel the first filter and how can I cancel the first filter before performing another from the same table.
I managed to filter & view records, but if I want to make a new search, I need to cancel the first filter and how can I cancel the first filter before performing another from the same table.
All you do is do a RS.CLOSE to shut down the first query and then re-run the OPENRECORDSET with the new params.
M
M
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