I created a simple page and added two instances of WebCombo; then specify the name as WebComboSuppliers and WebComboProducts respectively. In OnBeforeItemSelected client-side event of WebComboProducts, the selected value of WebComboSuppliers is evaluated. If WebComboSuppliers's value is 1, then cancel the selection.

Following snippet code shows how to do this using OnBeforeItemSelected.

function wcProducts_OnBeforeItemSelected(controlId, selectedText, selectedValue)
{
    var wcProducts = ISGetObject(controlId);
    var wcSuppliers = ISGetObject("wcSuppliers");
            
    if (wcSuppliers.Value == "1")
        wcProducts.ClearSelection();

    return true;
}

Hope this helps.

Thanks for your reply.

This is may not what I'm looking for.

When the user trying to select a combo box item, I want to check first if the user saved the current vew, if not I want to stay in the same view, and cancel the combo selection from the user and stay with the original sselection.

I need your help to do that, how to cancel the user selection?

I modified my sample based on the following information:

... I want to check first if the user saved the current view...

In order to emulate such condition, I added a checkbox and do checking: if checkbox.checked is true then...

... cancel the combo selection from the user and stay with the original selection.

In the following snippet code, I use OnBeforeRequest client-side event to save original selection of WebCombo in a variable. In OnBeforeItemSelected, check the checked state of my checkboxDummy. If true, cancel the combo selection and restore the original selection.

var wcProductsOriginalSelection = "";

function wcProducts_OnBeforeRequest(controlId, action)
{
    var wcProducts = ISGetObject(controlId);
            
    if (action == "LoadData")
    {                
        // save wcProducts original selection to global variable
        wcProductsOriginalSelection = wcProducts.Text;
    }

    return true;
}

function wcProducts_OnBeforeItemSelected(controlId, selectedText, selectedValue)
{
    var wcProducts = ISGetObject(controlId);

    if (document.getElementById("checkboxDummy").checked)
    {
        // cancel the WebCombo selection
        wcProducts.ClearSelection();

        // restore the original selection
        wcProducts.SetText(wcProductsOriginalSelection);
    }

    return true;
}

Hope this helps.

Glad to hear that the snippet code of OnBeforeItemSelected posted on March 12, 2015 helps.

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