Dropdown Menu selectedValue Propert

Using 7.9.12 I have a form that uses the Dropdown component. The dataset for the dropdown is a typical Value/Label two column dataset (integer and string) that is populated by a script on the window. What I’d like to do is preset the default value of the dropdown to the first item in the list which always has a Value of 0. I’ve tried through both bindings on the selectedValue property and through scripting to set this value to 0 however the dropdown always displays the “No Selection Label” which is “”.

Is there something I’m missing or not applying correctly to the selectedValue property?