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restricting characters entered in text box

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  • restricting characters entered in text box

    i have a text-box on a form for license plate. license plates have no letter "o", just number "0". i want to correct the user's entry if necessary when they depart the field, but can't figure out how....

    the file is "tickets". the data entry form is "ticket_entry_w_browse". the field name and the form object name are both "REGISTRATION".

    i've tried using stritran(":ticket_entry_w_browse.registration.value","o","0") and other variants of stritran in "can depart" and "on depart", but think i'm missing something simple because they don't work...

    if there's no easy way, i'll just run an operation after they close the "ticket_entry_w_browse" and return to the menu.

  • #2
    Re: restricting characters entered in text box

    this.text = stritran(this.text,"o","0")
    Tim Kiebert
    Eagle Creek Citrus
    A complex system that does not work is invariably found to have evolved from a simpler system that worked just fine.


    • #3
      Re: restricting characters entered in text box



      first parameter not quoted.

      Your expression replaces o in the text


      with 0

      ? stritran(":ticket_entry_w_browse.registration.value","o","0") 
      = ":ticket_entry_w_br0wse.registrati0n.value"
      There can be only one.


      • #4
        Re: restricting characters entered in text box

        thanks to both of you. tim hit the one i finally found after another 2 hours, but still before the message cleared the moderator...

        alpha 4 was sure easier..... but then again i've got 10 years 'programming' it..


        • #5
          Re: restricting characters entered in text box


          If you want to capture the data entry error as soon as the error is made, you could try the following:

          Use the onkey() function while your text box has focus to to fire a send_key() command when it sees the o character typed.

          I haven't tried this, but in theory, it should work.



          • #6
            Re: restricting characters entered in text box

            louis, i like the way your mind works!


            • #7
              Re: restricting characters entered in text box


              Great idea.


              Be sure to find some examples of onkey to base your effort on.

              Ira has some examples that he's posted here and there - along with others...

              It's not the deep end of the pool, but it is a little wavy now and then.

              OnKey can tell what field you are in and the appropriate coding is needed to change values only in the field(s) that you desire..
              Last edited by Al Buchholz; 04-30-2010, 04:37 PM.
              Al Buchholz
              Bookwood Systems, LTD
              Weekly QReportBuilder Webinars Thursday 1 pm CST

              Occam's Razor - KISS
              Normalize till it hurts - De-normalize till it works.
              Advice offered and questions asked in the spirit of learning how to fish is better than someone giving you a fish.
              When we triage a problem it is much easier to read sample systems than to read a mind.
              "Make it as simple as possible, but not simpler."
              Albert Einstein



              • #8
                Re: restricting characters entered in text box

                The OnKey is a good idea assuming the form has only one field.
                Does it?
                Don't think so.
                If you try to enter: John , you will end up with J0hn.

                I knew someone named J0hn. He was not very popular in school.

                So to modify this a little bit, you need to trigger the onKey event only for this field. How?
                In the onActivate/onDepart events of this field toggle the OnKey event on and off or use stritran() in the OnDepart event.

                What about I & l (small letter L) entered in place of 1 or 5 in place of S? Is that a consideration too?

                If so, a UDF is in order.

                In case I didn't mention it before, I really hate the OnTimer event, the Onley, send_keys() and few others.


                • #9
                  Re: restricting characters entered in text box

                  i'm using this:


                  in the 'can depart' event and it seems to work.

                  michigan allows "1" and "L" and "I" in their license plates and the cops often get them screwed up... it's just the 'round thing' that they finally got settled and i think that might be nationwide (LEIN)...

                  what i'm doing is writing a parking ticket program - the officers will be responsible for entering their own tickets in the program so that should eliminate most of the mis-interpretations except for the officer not being able to read the plate.

                  i looked at the file developed so far (in a spreadsheet) and realized that 'the girl' had entered all the garbage put on the ticket by the cops and the registration needed a lot of cleaning for which remspecial is great.

                  i saw the potential trap with the onkey event and realized that i'd have to condition the event with not only "o" but also make sure the registration text box was active using "<OBJECT>.ACTIVE()"..


                  • #10
                    Re: restricting characters entered in text box

                    Now I know how I ended up with all these tickets!