Hi Matt,
I think it just depends on how you look at it. I agree that because ASP is
server-side it should therefore technically be considered a "back-end" tier.
However when compared, for example, to a VB6 application the part that
creates the forms and presents the data to the user (creates the UI) is
considered the "client". For this reason most people think of the ASP tier
as being the client or "front-end" because it is responsible for generating
the part the user interacts with. While you could perform intense business
logic in ASP/VBScript code you probably shouldn't. ASP should be used for
taking the data and presenting it to the user in a nice way. You would then
also use it to take input from the user, roll it up and send it to your
middle-tier COM object or to your database. Technically the only part of
the process that is truly "front-end" code is any JavaScript that you may
have on the page. This actually runs inside the users browser and therefore
on the client machine.
I do all my business logic in COM or, better yet, in stored procedures on
the data-tier. I like to use the principal of moving my processing to my
data rather then my data to my processing. This is the reason I do as much
as I can in the data tier. I also find this scales well.
For example the order-entry system used by our sales staff for taking orders
over the telephone is web-based. When adding items to the order I use a
stored procedure like this
OEAddOrderDetail @OrderID, @ItemNumber, @Qty
These are the only three pieces of information the server needs from the UI.
It does not need the price. In our scenario prices cannot be overridden so
they are figured out on the server side by the Qty ordered. The same stored
procedure does a SUM to recalculate the subtotal. It then estimates Freight
and calculates the tax. This is all done server-side in the data-tier. The
data I need to figure these things out is all in my database. Why pass it
up through 10 layers of software (OLDB, ODBC, ADO) just to add it up and
send it back down?
Cheers,
Ken.
"Matt" <ma*******@hotmail.com> wrote in message
news:%2****************@TK2MSFTNGP10.phx.gbl...
I always heard people saying IIS ASP front end, and MS-SQL back end. ASP
is for server side programming and dynamic content generation, how could it
is called front end? Because I thought it is executed in the server, which is
back end? I think I am confused with the term front end and back end here.
Please advise. Thanks!!