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Calculate Age in a Dialog

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  • Calculate Age in a Dialog

    Probably a simple answer to this but I can't find it. How do I calculate someone's age in a dialog? I have a field called DOB as a date field. I have a text box (textbox1) next to it where I want to just show the user the person's age, this field does not need to be saved I just want to display it to the user. If I go to the Calculated Field Expression of textbox1 I see that I cannot use the AGE() function nor the DATE() function so I'm now lost on how to calculate the field. A simple (Date()-DOB)/365.25) would be sufficient for my purposes but it looks like it's not allowed. Any ideas?

    Thanks

    -John

  • #2
    Re: Calculate Age in a Dialog

    Have your tried age(field with DOB)?
    Regards
    Keith Hubert
    Alpha Guild Member
    London.
    KHDB Management Systems
    Skype = keith.hubert


    For your day-to-day Needs, you Need an Alpha Database!

    Comment


    • #3
      Re: Calculate Age in a Dialog

      Hi Keith

      Yup. Using the AGE() function is not allowed and neither is DATE(). I think what I need to do is an Ajax Callback on the OnChange of the DOB field.

      If anyone knows a way to do it in the Calculated Field Expression of a textbox I'd be interested to know.

      Thanks.

      Comment


      • #4
        Re: Calculate Age in a Dialog

        I got this to work by using an Ajax Callback but now I have another problem that might be a bug so if someone can verify this then I will report it.

        1) Create a textbox of type Date (for holding a date of birth). Let's call it DOB
        2) Create a textbox (for holding a calculated field). Let's call it MyField
        3) Create an Ajax Call back on the OnChange of the DOB field to stuff something into MyField. It can be anything, Int((DATE()-DOB)/365.25) for example
        4) Enter something into DOB and move off the field.

        All seems to work ok. The MyField will be stuffed with whatever you have in your Ajax Callback, however...

        5) For field DOB, add a Date/Time Picker.
        6) Enter something into DOB and move off the field.

        The MyField remains empty, it appears the OnChange of the DOB field does not fire once you add the Date Picker to it.

        Can someone verify that?

        Thanks

        -John

        Comment


        • #5
          Re: Calculate Age in a Dialog

          Originally posted by Jberry View Post
          The MyField remains empty, it appears the OnChange of the DOB field does not fire once you add the Date Picker to it.

          Can someone verify that?

          Thanks

          -John
          Not all control types have all the events. The onchange doesn't fire when you use a date picker. Using an ajax callback is a little overkill for what you want. In your textbox1 field, in the client side properties, Calculated field expression insert getAge(DOB) Then, in the Code, Javascipt functions section paste this code in
          Code:
          function getAge(dateString) {
              if(dateString != "" && dateString.length >7 ){
          	    var today = new Date();
          	    var birthDate = new Date(dateString);
          	    var age = today.getFullYear() - birthDate.getFullYear();
          	    var m = today.getMonth() - birthDate.getMonth();
          	    if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {
          	        age--;
          	    }
          	    return age;
          	 }else{
          	 	return "";
          	 }   
          }
          This will do all the calculation on the browser and will work with a date picker as well. I've attached a simple dialog component as an example. You can drop it into your web project folder to see how it works. If you type into the DOB control you'll need to tab out to see the results.
          Attached Files
          Jim Coltz
          Alpha Custom Database Solutions, LLC
          A5CustomSolutions.com
          jimcoltz@a5customsolutions.com

          Comment


          • #6
            Re: Calculate Age in a Dialog

            Hi Jim,

            Thanks for that. Yes an Ajax callback is probably overkill but as I don't know JS I hav no choice :) I'll try this and let you know how it goes.

            Thanks again.

            Comment


            • #7
              Re: Calculate Age in a Dialog

              Jim, thanks. Works like a champ.

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