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Cascading Dropdown Boxes

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  • Cascading Dropdown Boxes

    My first post and I am very new to Alpha - so I hope I am explaining this correctly.

    I have a UX that has two drop down boxes and I am trying to cascade them.

    The application is a very simple heat loss / gain calculation used by HVAC contractors. Depending on which way a window faces we need to use a different factor to calculate the heat gain for that window. The UX has several repeating sections and the drop down boxes are in a repeating section.

    Box 1 - static text - only five options, North, South, East, West and Roof (Locations where a window might be in a home)
    The box works perfectly. (I also tested this using dynamic population and it works that way as well.)

    Box 2 - is dynamically populated. It looks at a table and then picks out all the factors that apply to windows and then lists them.

    Here's my problem - when I tell BOX 2 that it is cascading and BOX 1 is it's parent, BOX 2 no longer pulls in the values. I have tried using lists instead and get the same result. I have deleted them and restarted a few times and every time BOX 2 will populate UNTIL i cascade it. Then if I remove the cascading it will no longer populate.

    This is probably just some stupid newbie mistake but I would appreciate it if someone could tell me.



  • #2
    Re: Cascading Dropdown Boxes

    welcome to alpha message board, a wonderful place for all the information and your answers, without this board alpha won't as good as it is.
    now about cascading drop downs.
    the box1 and box2 should derive the data from a single source, then only the cascading will work. to explain
    if your box1 is populated with a dropdown of five choices of a simple list
    and the box2 will be populated dynamically from a lookup_table that box2 does not know anything about box1 data, so nothing will come. on the other hand
    if your box1 is populated with a drop down populated from the lookup_table and then the box2 is populated with data from the same lookup_table with cascading box1( filter ) then data will come.
    hope i have explained well enough for you design your cascading drop downs. if still in doubt, post back one of us will show you how to do.
    thanks for reading


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    • #3
      Re: Cascading Dropdown Boxes

      Thanks for the reply and IT WORKED!

      Probably many more questions to come as I try and teach myself ALPHA. So far I am really impressed.