Unexpected selected value in MVVM when only 1 item in source

[Matjaz]

When dataSource has only one item, widget automatically select it, but selected item in MVVM is null. I would expected that this 2 things are synchronize.
demo just click "click for selected value" button.

[Georgi Krustev]

Hello Matjaz,

In general, MVVM value binding updates the model value on widget change, which will not be raised on load. Hence if you need to update the model based on the selected value after widget data binding, then you will need to trigger change event manually. This approach will work for multiple widgets too. I will suggest you wire the dataBound event and call trigger("change") there:

Copy Code

function updateModel(e) {
            var widget = e.sender;

            setTimeout(function() {
                widget.trigger("change");
            });
};

Check the updated demo page.

Let me know if this does not work for you.

Regards,
Georgi Krustev
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