In a web page, there are 4 ListBoxes. those are filled by data from different tables in database, However they are associated to each other via FKs. First ListBox contains Category, Second have SubCategories based on category selected, third have tertiary based on SubCategory Selected and fourth have SubTertiary based on tertiary selected. What is the most efficient way to do this, which followed Industry standard? Actually I want least Possible Communication with web server becoz of Postback in this case every time?
...
Go to the complete details ...