The OnClientSearch client-side event occurs 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 RadSearchBox firing the event.
An eventArgs parameter containing the following methods:
get_text() - returns the text that is typed in the searchBox, or the text of the selected result item.
get_value() -returns the value of the selected result item.
get_dataItem() - returns the dataItem that is associated with the selected result item.