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Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

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  • Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

    I have a dialog. On that dialog, I have three DropdownBoxes.

    DropDownBox1 (Parent)

    DropDownBox2 and DropDownBox3 are cascading choices linked to DropDownBox1. When I run the dialog and make a selection from DropDownBox1, DropDownBox2 updates correctly, but DropDownBox3 does not update. Is this a limitation of the cascading drop down that you can only have one "child" dropdownbox.

  • #2
    Re: Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

    i believe it is.

    instead of using dropdowns you might consider using edit combos.

    if the edit combo is set to:
    1. populate using an ajax callback
    2. not allow caching
    3. turn on dynamic filtering
    4. user must select from list.

    then if the two child dropdowns are converted to edit-combo, their contents will be dynamically populated when they are opened. their dynamic filter could be set reference the value in the parent dropdown.

    alternatively you could used dropdown that are NOT set to be cascading, and in the onChange event of the parent dialog you could repopulate the two child dropdowns yourself.


    • #3
      Re: Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

      Great feedback. Will update the application with your edit combo input.


      • #4
        Re: Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

        Your feedback fixed what I was trying to do. I was able to set up a test dialog using three text boxes configured as edit-combo. Worked great. The "child" controls updated great. And, the save/restore functionality of the dialog to my MySQL database also wokred great. Saving the state of the text boxes and restoring them correctly.

        I do have one follow up question. Is there a way to mimic the behavior of the dropdownbox. Specifically, have the control show the "Fields To Display" selection that matches the "Field to Return". For example, let's say I have a list of cities and city codes. The control would show the city name ("Kansas City"), but behind the scenes the value of the field would be the code ("KC"). Right now, after they have selected the city "Kansas City", the control shows the "KC".

        p.s. Open to suggestions or alternatives.
        Last edited by dionmccormick; 01-09-2012, 08:45 PM.


        • #5
          Re: Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

          Hi Dion,

          I use dummy (unbound) controls for this. Set it as the edit combo and to auto-fill the (hidden) returning control. Leave it unhidden for testing purposes, then hide when you go live, the user is none the wiser


          • #6
            Re: Cascading DropDownBox - Only one "child" cascading DropDownBox updating...

            Worked great. Thanks for the tip!