How to refresh (i.e. clear text from) an autocompletebox once an item has been selected?

I'm designing a Silverlight screen where I use an autocompletebox control.

One t开发者_如何学Che item 'foobar' has been selected in the autocompletebox, it's text reads 'foobar'. If a user wants to select the 'quux' value, he has to:

1. delete the text from the control,
2. then to type 'qu' so as to be able to select 'quux'.

Is there a way to performe the step #1 within the SelectionChanged event?

Hint: set the .text property don't work (unless it's followed by some refresh method I don't know of)

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SelectionChanged is the wrong event to monitor.

Simply subscribe to the DropDownClosing event, there you'll be able to edit the .text property.