need to convert whole letter in uppercase

Hi
    I need to convert whole user entered text in my whole project into
upper-case and also save it as a upper-case letter in database.If any
one knows please help.

Ruby has an upcase method which should help you out

Ruby has API docs. really.

http://www.ruby-doc.org/core/classes/String.html

read about the upcase method

I need to put the code in only one place and it should effect all so
where should i put...