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3 Questions - 3 Answers Please

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    3 Questions - 3 Answers Please

    Hi All,

    1. Why does this expression work in a calculated field on a form but not in the form's Filter? CYear(System->Date) On a form, it returns the current year which is what I want. However, when I place it on the form's filter, I get an error message stating the equation must return a logical value.

    2. I created a variable which shows in the drag/drop list but not in the variable section when selecting fields for an expression.

    3. I created a calcualted field which shows in the drag/drop list but not in the calculated field section when selecting fields for an expression.

    I want the form's filter to filter out all records but the current year. Maybe this is so easy I can't see the forest through the trees.


    TYVM :) kenn

    Knowing what you can achieve will not become reality until you imagine and explore.

    RE: 3 Questions - 3 Answers Please

    1. A filter must return a logical value to decide whether to include/exclude a record. Try

    cyear(mydatefield) = cyear(system(date()) ' sound logical?

    2. Don't know why they sometimes don't appear, but you can type them into the expression as var->.....

    3. Never saw this, should be same answer as above, try typing in as calc->......
    There can be only one.


      RE: 3 Questions - 3 Answers Please


      As for question 1, Stan is right. When you put the function in a calc field on the form, it returns the current year. When you put the function in a filter expression it also returns the current, but the 'filter' can't do anything with it. It's like telling Alpha Five to filter on '2002', without telling it what field in your table to use for comparison. Alpha Five is smart, but not smart enough to read our minds. It has no way to use the value returned by the cyear() function unless you build a complete filter. This means defining what field or expression values must match the results of the cyear() function.

      -- tom


        RE: 3 Questions - 3 Answers Please

        create an index for "year" using a date field in the table and filter it with cyear(date()=cyear(date fld). Then either create a button to select ONLY current year records, or set an oninit event to set the index to current year.


          RE: 3 Questions - 3 Answers Please

          Stan, Tom & John,

          Thank you for your replies. Yes, it makes sense and sounds 'logical'. I tried typing the Var field into the expression but an error message comes up saying the field doesn't exist, either using the var field name itself or prefacing it with Var->.

          There was one time when I opened the form and went to the expression builder, I did see the variable and calc field in the var and calc list boxes, but not since.

          Anyhow, I'll work on it this evening.

          Thanks again,

          TYVM :) kenn

          Knowing what you can achieve will not become reality until you imagine and explore.


            RE: 3 Questions - 3 Answers Please

            Most of the time for the variables to show they need to be Global variables. When I use layout or session variables I never see them in the expression builder.


            Dan Blank builds Databases
            Skype: danblank


              RE: 3 Questions - 3 Answers Please


              1st things first. Missed you at the conference!

              I did tried them as layout, session and global variables. Global doesn't show up either and typing the names didn't work.

              Ha! I love this stuff. It sure can become a mental challenge (OK, no comments from the peanut gallery).

              TYVM :) kenn

              Knowing what you can achieve will not become reality until you imagine and explore.


                RE: 3 Questions - 3 Answers Please

                Ken, RE Variables

                I've stumbled upon... like everything else with A5.... a solution.

                Declare the variable as global at startup. I start about 15 emptly, stock variables by declaring them on the init event of the first menu form. When you do it that way you can 'see' them everywhere - even saw one on the wall near the CPU [ha]. To these experienced and intuitive programmers it's probably clutter - but damn it -- it works for me. Anytime you're in the code editor you can click open 'Variables' [like A4] and see all of them and their current values. This cuts out a lot of trace.writeln() coding to find out what's goin on.
                Try it -- you'll like it- you're an old A4 guy too.