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Any examples or explanation of Specify Browse by Expression?

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  • Any examples or explanation of Specify Browse by Expression?

    I am trying to find some sort of explanation as to how the 'Specify Browse by Expression' works. The only thing I could find in the Help files and Alphapedia is a short line saying that this is an expression that is supposed to select fields that are displayed in a browse; but no explanation as to how you do it. (here is the entry: http://wiki.alphasoftware.com/~alpha...wse+Properties ) - some way down the page.

    What I want to do is, have a browse that shows one column and hides two others, depending on what record I am in. I want to put it in a form based on a set; the parent table has only a few records, the browse is based on a child table linked one to many. There are three columns in the child table that are only relevant to some of the parent table records, so I want only the relevant column to show. So, if I navigate from one record to the next, the browse should be modified accordingly. I hope that makes sense.

    Alternatively, I could just have the form display one of three different named browses on the table depending on the record. Of course, I could place all three browses on top of each other on the form and dynamically hide or show the appropriate browse, but I am hoping there is a better way of doing this.

    If you can point me in the right direction, I would be very grateful.
    It is easier to get older than wiser

  • #2
    Re: Any examples or explanation of Specify Browse by Expression?

    Never mind, I found it here: http://wiki.alphasoftware.com/~alpha...+by+Expression
    It seems to work with named browses, not just embedded ones as it says on the alphapedia.
    It is easier to get older than wiser

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    • #3
      Re: Any examples or explanation of Specify Browse by Expression?

      Create three embedded browses and place each on a page of a conditional object. Have the OnFetch event for the form refresh the condition based on the test you set.

      If needed, pull a field out of the browse and semi-hide it on the form by setting the font color the same as the background and make it disabled. I don't know what you are looking for to determine which browse you want to display.
      Robin

      Discernment is not needed in things that differ, but in those things that appear to be the same. - Miles Sanford

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      • #4
        Re: Any examples or explanation of Specify Browse by Expression?

        Look at the email_features_demo database supplied with v12. The Customer form lookup browse has a really slick example of dynamically changing the field contents in a single browse on a form.

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        • #5
          Re: Any examples or explanation of Specify Browse by Expression?

          Originally posted by MoGrace View Post
          Create three embedded browses and place each on a page of a conditional object. Have the OnFetch event for the form refresh the condition based on the test you set.
          Robin,

          You are better off using browse by expression rather than a conditional object. That way only one browse is on the form at a time.
          Peter
          AlphaBase Solutions, LLC

          [email protected]
          https://www.alphabasesolutions.com


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          • #6
            Re: Any examples or explanation of Specify Browse by Expression?

            Actually Peter I doubt I would ever do it that way myself. But I suppose creating three different browses to display the data from the same table might make sense. First I would consider whether irrelevant data needs to even be in the same table...or whether a link to another table might work better. I suppose an example of the data would help.
            Robin

            Discernment is not needed in things that differ, but in those things that appear to be the same. - Miles Sanford

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            • #7
              Re: Any examples or explanation of Specify Browse by Expression?

              I am currently doing this now. The app is for the insurance industry which contains data elements for Insurance Companies, Examination Companies, Insurance Agents, Examiners, clients... etc. I have a form with one button that the user selects from a list of queries they wish run on the set data, with each query having focus on filtering for specific element combinations. Based upon the query they select, the code 1) presents a dialog for the user to enter/select the data values (dates and such) for 2-3 fields for the query, 2) reveals the embedded browse to display, 3) sizes the embedded browse 3) filters the table to show the return for the specifics the user entered for the query There are 7 embedded browses on my form that each have a different configuration of data and buttons in the browse to execute various secondary events fr the filtered data. I was dubious about it working, but it works great! One form, 7 embedded browses, about 11 query scripts.
              Mike W
              __________________________
              "I rebel in at least small things to express to the world that I have not completely surrendered"

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