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  1. #1
    New to the CF scene
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    May 2013
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    DevEx TreeList checkboxes, possibly bind

    Hi,
    Trying to get a treeList in DevExpress to have two columns
    of checkboxes that can be checked and unchecked, and are populated
    in code upon load (from database, but that part of the code I can
    do) and maintain their checked and unchecked states upon reloading
    the page. In DevEx things can be tricky and it is difficult to
    find solutions on google. Anyways, it took me a while to find
    out how to check and uncheck boxes and at the same time have them
    set to specific states upon load. But the problem is maintaining
    those states. If you don't know DevEx, you will not be able
    to answer this question correctly, trust me, it's not something
    simple like "use ViewState". Anyways, it can be done by binding
    a DataTable to the treeList, but the problem is when I bind,
    the parent-child relationship is not there, even if the ID
    and ParentID columns are defined and properly set.
    If you have worked with DevEx and know what the difficulty with
    what I'm talking about is, please help, as I have a deadline to meet
    and google is getting me nowhere.

    If the binding solution will not work, I would accept some other
    workaround. I am using a DataCellTemplate in a TreeListCheckColumn
    inside a TreeList. The problem is if I call an event from the
    CheckBox OnValueChanged, it's not firing, and even previously
    when I was able to call an event from either the ASPxCheckBox (DevEx
    CheckBox) or from the CheckColumn, the Key of the row is not available.
    If you know how to get the even to fire and get the row, and set
    the check state, please let me know, the difficulty is not in getting
    the event to fire, that's just a simple lack of memory/saving my
    code on my part.
    If you've used DevEx and tried this problem before, you will know
    what the difficulty I'm talking about is. Anyways, if you know
    a solution, please help.

  • #2
    Regular Coder
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    May 2012
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    Maybe the DataCellTemplate that you are using is not compatible with TreeList and so some of the events are not firing on call.


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