Add List:String in dropdown

Hello

i want add this list of string during the loading of the form

i go On Edit -> On Load ->

list2 = List:String({"hockey", "cricket", "football", "tennis"});

for each e in MySubForm

{

e.Dropdown:ui.append(list2);

}

but after the downloading i have already just "Choice 1" in my dropdown. Do you know why ?

thanks you