How to activate a button only when an item of component tilelist is selected

Simple question, but it seems quite difficult for me. How to activate a button only when an item in a tilelist currently selected?

For example, lets say if I have a button named button1, which is disabled by default and a tilelist component called tilelist1 that I should add in brackets the following (the enabled property of the button) code to make sure that the button is only enabled when an item in the tilelist component is currently selected but disabled when no item is selected :-

enabled = "{}".

Enabled = "{tilelist1. SelectedItem} ".

that should do it, it is making an implicit comparison with null (tilelist1.selectedItem == null) which will result in a Boolean value.

SelectedItem is null when nothing is selected, non-null when something is.

Tags: Flex

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