I’m willing to advise you further but in order to do so we would need you to elaborate on your specific scenario and possibly give us a running simple sample and a step-by-step guide that we can use to observe the problematic behavior.

To check the code that is used to implement “the row adding” process, put it at the top of the list (in OnShowDropDown event) will help to determine which part that may have caused the issue.

Hi Yudi,

The Parent combo is called wcboTechnique and the Child combo is wcboInstrumentGroup. I add a row to wcboInstrumentGroup onShowDropDown event. Combo boxes are populated dynamically in the table. They have “id” what is their numeric number in the table: for example wcboTechnique1, wcboInstrumentGroup1; wcboTechnique2, wcboInstrumentGroup2, etc.

I also have to use onLostFocus event to explicitly specify the selected row. Otherwise, “Any for technique” will be selected.

"InsertAtTop" doesn't do anything, since "Any for technique" is populated immediately and at the top anyway while the rest of the combo is populated a couple seconds later.

Thanks, Ellen

function onInstrumentGroupShowDropDown(id) {

    var combo2 = ISGetObject("wcboInstrumentGroup" + id);

    var newRow;   

    rows = combo2.GetRows();

    if (rows[0]) {

        cells = rows[0].GetCells();

        if (cells.GetNamedItem("Description")) {

            if (cells.GetNamedItem("Description").Text != "Any for technique") {

                newRow = combo2.NewRow("-1");

                cells = newRow.GetCells();

                cells.GetNamedItem("Description").Text = "Any for technique";                

                rows.Add(newRow);

                combo2.InsertAtTop = true;               

                combo2.UpdateUI();                    

            }

        } else {

            newRow = combo2.NewRow("-1");

            cells = newRow.GetCells();

            cells.GetNamedItem("Description").Text = "Any for technique";           

            rows.Add(newRow);

            combo2.InsertAtTop = true;

            combo2.UpdateUI();           

        }

    } else {

        newRow = combo2.NewRow("-1");

        cells = newRow.GetCells();

        cells.GetNamedItem("Description").Text = "Any for technique";

        rows.Add(newRow);

        combo2.InsertAtTop = true;

        combo2.UpdateUI();       

    }  

}

function onInstrumentGroupLostFocus(id) {

    // Since "Any for technique" is added on ShowDropDown event, it is highlighted automatically even if

    // another InstrumentGroup is selected. hdnInstrGroupDesc is set based on intentionally selected InstrumentGroup

    // and helps to retain the correct value.

    var combo2 = ISGetObject("wcboInstrumentGroup" + id);

    var selectedText = combo2.Text;

    if (combo2.Text == "Any for technique" && combo2.Value == "") {

        eval("document.all.hdnInstrGroupDesc" + id).value = combo2.Text;

    }  

    var InstrGroupDesc = eval("document.all.hdnInstrGroupDesc" + id).value;   

    combo2.SetText(InstrGroupDesc);

}

The issue happen because the OnShowDropDown client-side event is fired two times.

I have forwarded this to WebCombo development to be investigated further.

I’ll keep you informed with any news I heard from the team regarding this behavior.