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Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

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drop-down combo box doesn't filter

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    #1

    drop-down combo box doesn't filter

    I have a drop-down combo box on a form. In the Choices tab,
    I have it set to compute automatically from a table. I clicked on Enable Filter Expression, and in the expression box I have CODE="TAP" in the filter expression for the target table (the table that provides the values).

    However, the filter doesn't seem to work - the drop-down shows all records in the table, not the ones with TAP in the CODE field.

    Am I missing something?? Any help greatly appreciated.
    Tags: None
    #2
    RE: drop-down combo box doesn't filter

    I'm not sure, but maybe what you need to is set the Field Expression (in target table): to CODE, Operator: =, and Field Expression (in current table): TAP. Something along those lines.

    Steve

    Comment

      #3
      RE: drop-down combo box doesn't filter

      steve is correct. excepting that TAP must be quoted as it is a string.

      Comment

        #4
        RE: drop-down combo box doesn't filter

        Bill,

        Try TRIM(CODE)="TAP". If code is wider than 3 characters, it may be comparing the trailing spaces of the field's width.

        Regards,

        Ira
        Regards,

        Ira J. Perlow
        Computer Systems Design


        CSDA A5 Products
        New - Free CSDA DiagInfo - v1.39, 30 Apr 2013
        CSDA Barcode Functions
        CSDA Code Utility
        CSDA Screen Capture

        Comment

          #5
          RE: drop-down combo box doesn't filter

          Ira,

          Alpha does look at the trailing spaces. I have a 4 character field in which I currently am entering 2 character codes. I have to use the trim function to correctly select the records.

          My 2 cents,

          Jerry Gray

          Comment

            #6
            RE: drop-down combo box doesn't filter

            Jerry,

            Remember. The DBF format uses fixed width fields. Each character field value entered by the user is automatically padded with trailing spaces in order to "fix" the width of the field as it's stored in the DBF. This can be easy to forget since the spaces are invisible. But they're there, and will be used for comparisons if your expression or script tells Alpha to use the field. Alpha assumes you want to use the entire field when you tell it to use the field. -- t

            Comment

              #7
              RE: drop-down combo box doesn't filter

              Tom,

              I've been out of the business since '92. Then I worked with HP3000 and PowerHouse. Working with their database, "ABC" = "ABC", regardless of field size. I was somewhat surprised at the included spaces in DBF. This is my first time to work with DBF, but I'm learning.

              Thanks for the input.

              Jerry

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