The OnSearch event is raised when the search button is clicked, Enter is pressed, or an item from the searchBox dropdown is clicked.
The event handler receives two parameters:
The instance of the SearchBox firing the event
An event arguments parameter that contains the following properties:
Text - returns the text that is typed in the searchBox, or the text of the selected result item.
Value - returns the value of the selected result item.
DataItem - returns the dataItem that is associated with the selected result item.