If you have DateTime field in the database and displays it on the page it will display something like this:
3/4/2005 12:00 AM
Now if you only want to display the date part which means "3/4/2005" you can easily accomplish this:
<%# ((DateTime)DataBinder.Eval(Container.DataItem, "DateCreated")).ToShortDateString()%>
Here "DateCreated" is the name of the field in the database and we are simply converting the returned date into ToShortDateString format.