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Checkbox parameter query syntax

Posted on 2009-07-03
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Last Modified: 2013-11-28
I can't seem to get the following code to work.

frmPR has several combo boxes and 4 checkboxes that the user can select (one or more). I would like it to filter the results based on what the user checks - whether it be just A, or A and B, etc. I also need it to display ALL records if the user does not check anything. I was able to get it to filter based on the checkboxes but it wouldn't display all if no checkboxes are selected. Or I was able to display all but it wouldn't filter properly. :(
There are other fields with Like Iif... filters that are currently working right now (but not tied to checkboxes, just combo boxes). I am trying to turn one of the combo boxes into a check box since the user needs to select one or more of the contents.
What am i doing wrong?

Please and thank you,
j
Like IIf(([Forms]![frmPR]![chkA])=True,"A","*")  Or Like IIf(([Forms]![frmPR]![chkB])=True,"B","*") Or Like IIf(([Forms]![frmPR]![chkC])=True,"C","*") Or Like IIf(([Forms]![frmPR]![chkD)=True,"D","*")

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Question by:jenica024
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by:pcelba
ID: 24772689
The Like operator needs two operands but you have just one. The column name from your table is missing. One possible solution is in attached code. For me it seems more probable to use AND operators. If you tell what the condition should test and what columns should be included then we may help better.
ColumnA Like IIf(([Forms]![frmPR]![chkA])=True,"A","*")  Or 
ColumnB Like IIf(([Forms]![frmPR]![chkB])=True,"B","*") Or 
ColumnC Like IIf(([Forms]![frmPR]![chkC])=True,"C","*") Or 
ColumnD Like IIf(([Forms]![frmPR]![chkD)=True,"D","*")

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by:shru_0409
ID: 24772717
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by:shru_0409
shru_0409 earned 100 total points
ID: 24772873
IIf(([Forms]![frmPR]![chkA])=True,"A","*")
 Or IIf(([Forms]![frmPR]![chkB])=True,"B","*")
 Or IIf(([Forms]![frmPR]![chkC])=True,"C","*")
 Or IIf(([Forms]![frmPR]![chkD)=True,"D","*")
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by:shru_0409
ID: 24772877
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by:jenica024
ID: 24773089
Sorry - to explain better:
i have a column called "Type" - which contains either A, B, C or D. Before I just used:
Like IIf(IsNull([Forms]![frmPR]![cboType]),"*",[Forms]![frmPR]![cboType])
which worked really well because the user can select a type from the combo box in a form and it will show all A's or B's, etc. Also, if the user selected none it showed all records.
Now they want to be able to select one or more types. Say A and B or B and C, etc. I thought putting check boxes was the way to go..but if you have other suggestions I would explore those too. I could only get one of the conditions working - say i could get the checkboxes to filter out one or more types but when the boxes aren't checked it wouldn't show all records.

shru_0949:
i got this far before and it did work for the checkbox selections but it would not print all if no checkboxes were selected. :(
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Accepted Solution

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pcelba earned 400 total points
ID: 24773224
Then you need to create a simple pattern:


Dim Pattern As String
Pattern = IIf(([Forms]![frmPR]![chkA])=True,"A","") + 
          IIf(([Forms]![frmPR]![chkB])=True,"B","") +
          IIf(([Forms]![frmPR]![chkC])=True,"C","") +
          IIf(([Forms]![frmPR]![chkD])=True,"D","")
Pattern = IIf(Pattern = "", "*", "[" + Pattern + "]")
 
'and use the Pattern in Like operation:
TypeCol Like Pattern 

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Author Comment

by:jenica024
ID: 24776916
i just want to clarify: i will need to put this in a module and in design view of the query in the criteria field use it?
thanks so very much...
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Author Closing Comment

by:jenica024
ID: 31599578
thank you for the help. :)
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Expert Comment

by:pcelba
ID: 24777251
If you need to put it into query then you have to create user function or write it as one expression, e.g. this way:

TypeCol LIKE IIf( ([Forms]![frmPR]![chkA]) OR 
                  ([Forms]![frmPR]![chkB]) OR 
                  ([Forms]![frmPR]![chkC]) OR 
                  ([Forms]![frmPR]![chkD]), "[" +
          IIf(([Forms]![frmPR]![chkA]),"A","") + 
          IIf(([Forms]![frmPR]![chkB]),"B","") +
          IIf(([Forms]![frmPR]![chkC]),"C","") +
          IIf(([Forms]![frmPR]![chkD]),"D","") + "]", "*") 

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Author Comment

by:jenica024
ID: 24842381
Sorry to be asking this late...what is TypeCol?
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