Can I list all the items in the bound datasource by using arrow key when using AutoCompleteBox?

Can I list all the items in the bound datasource by using arrow key when using AutoCompleteBox?

I have a datasource bound to an AutoCompleteBox control. When the user types a letter, the filtered items are shown. However, before they type in any text, I want the user to have the ability to hit the arrow key and show all the items in the list. How do I go about doing this?

Thanks,

Wei

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