Question : asp.net textbox -keywords textbox

I need to add a keywords text box  on a web form in asp.net app

For example a product could have the keywords as
   Household
   Electrical
   Hairdryer

I have a keyword mapping table in the database that maps the keyword id against the product id

My question is what is the best approach  to input the keywords.  Would it be in a text box separated by a comma?   Or is there better way
 

Answer : asp.net textbox -keywords textbox

hi
you can use AutoComplete for textbox control.

Refer:
http://www.asp.net/AJAX/AjaxControlToolkit/Samples/AutoComplete/AutoComplete.aspx