title: Distinct values in data bound combobox
body: <p>I have a table Inventory(ItemId,Name,Size,Price,otherinfo) where ItemId is primary key and Name,Size,Price are unique.<br>
  When I bind the combobox with Name all repeated names appear while i want each name to appear just once, same happens with Size.</p>
  
  <p><strong>How to load unique values in combobox which is bound to a datasource?</strong></p>