Using different form strings to filter

Hello.  Is there a way to code a query to have it use a filter string
if a form is open, or ignore it if the filter is not open?


Query Name:  Query1
Form:  Form1 and Form2
Query fields:  Field1 and Field2

I have a string in field 1 and 2

Forms!Form1!Field1 in the first field of the query, and Forms!Form1!
Field2 in the second field.  Can I also have Forms!Form2!Field1 in the
query as well?  I have tried this, but a box pops up and asks for the
information from form 2 when it is not open.

Thank you.
1/20/2008 4:06:37 PM
access.queries 6343 articles. 1 followers. Follow

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hi, wrote:
> Hello.  Is there a way to code a query to have it use a filter string
> if a form is open, or ignore it if the filter is not open?
Yes, there are some ways to do it, I'd prefer the use of a "proxy" 
function in a standard module, e.g.

Option Compare Database
Option Explicit

Public Function ProxyFilter As Variant

   ProxyFilter = Null
   If CodeProject.AllForms.Item("yourForm").IsLoaded Then
      ProxyFilter = Forms![yourForm]![yourField]
   End If

End Function

And use the following condition in your query:

   WHERE IsNull(ProxyFilter) OR field = ProxyFilter

You need a function for each field you like to query.

--> stefan <--
1/20/2008 4:19:40 PM
Thank you.  I tried this and it does not seems to be working.  I
inserted the code in a module (I think this is what you told me to do)
and entered the string you provided in my query field.  I am getting
an error : Invalid Syntax.  Any idea what I am doing wrong??

Thanks again
1/20/2008 6:31:49 PM schrieb:
> Thank you.  I tried this and it does not seems to be working.  I
> inserted the code in a module (I think this is what you told me to do)
It must be a standard module, not a form, report or class module.

> and entered the string you provided in my query field.  I am getting
> an error : Invalid Syntax.  Any idea what I am doing wrong??
What Access version do you use?

The SQL of your query should read like that:

FROM [yourTable]
WHERE IsNull(ProxyFilter()) Or [yourField]=ProxyFilter()

--> stefan <--
1/20/2008 6:54:26 PM
Acces 2003.  I tried the SQL view insert, but when I switch back to
design view, it only shows ProxyFilter() in the OR column, and when I
execute, I get an error "Undefined function "ProxyFilter' in
1/20/2008 7:18:30 PM

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