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In the most basic scenario where the RadAutoCompleteBox control's ItemsSource is simply bound to a collection in your ViewModel the user entered input could be taken from the SearchText
property of the control. This property represents the currently visible text in the control. Have in mind that when the control is used in its default "Multiple
, if an filtered item is selected from its drop down the SearchText will be reset
to a string.Empty value. And when the control is in its "Single
" SelectionMode the SearchText is updated to the full text
of the selected item.
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