[Solved] Automatically select first matching item

[Martin]

I have a problem with a filterable ComboBox:

When the user starts typing some text, then the ComboBox correctly displays only items containing the entered text.
If the user now selects (either by clicking or by using the down-arrow key) an item, then everything works as expected.

But if the user types some text, then leaves the ComboBox (e.g. by pressing the tab-key), no item is selected.
Is there a way to detect that situation (client-side) and automatically select the first matching item (if there are matching items) or restore the previous selection?

BTW this is how the combobox is created in the View:

<%= Html.Telerik().ComboBox()
                .Name("ComboBox")
                .BindTo(Model.Jobs)
                .SelectedIndex(Model.Jobs.FindIndex(j=>j.Selected))
                .AutoFill(true)
                .OpenOnFocus(true)
                .Filterable(filtering => filtering.FilterMode(AutoCompleteFilterMode.Contains))
                .HighlightFirstMatch(true)
%>

Thanks,
Martin

[Martin]

I think I made some progress, but have now another problem:

I added a client-side handler for the OnChanged event. If the user did not correctly select an item, I am able to find the first match, using the combobox.filteredDataIndexes array:

<%= Html.Telerik().ComboBox()
        .ClientEvents(e=>e.OnChange("OnChanged"))
        // other methods omitted ...
%>

function OnChanged(e) {
        var combobox = $(this).data("tComboBox");

        var item = null;
        if (combobox.selectedIndex < 0 && combobox.filteredDataIndexes.length > 0) {
            // the user did not select an item -> select the first matching item
            item = combobox.data[combobox.filteredDataIndexes[0]];
            console.log('selecting item at index ' + combobox.filteredDataIndexes[0]);

            // this results in an error:
            combobox.select(combobox.filteredDataIndexes[0]);
        }

        return;
}

The problem is, that when I call combobox.select(combobox.filteredDataIndexes[0]); this gives an erro rin the javascript console:

Uncaught TypeError: Cannot read property 'Text' of undefined  

Any ideas?