Jquery/Json Web Form to populate textboxes from SQL DB

Hi all,

I would like an example on how to retrieve data from SQL Server DB and then populate the retrived data using texboxes with Jquery/Json or some type of web method/web service if possible.  I have googled this and all I found is how to pupulate listbox or dropdown.  I have dozens of textboxes that i need to populate.  Any ideas or examples would be helpful.  

Thanks!