Claude, I really cannot say I notice much overhead, it is very quick for me. If your catering for people on slow dialup connections then ANT server side validation would be slow, so are you suggesting DO NOT DO SERVER SIDE VALIDATION if it causes any overhead?
It is quicker for one very simple reason. When you do server side validation, you are submitting your entire form, and then loading an entire page in the response which must be rendered, this takes a lot longer than a small bit of data being transmitted over ajax. Do the math, work out your page size in KB and then compare it to the data you would send and receive via AJAX. The reason for two routines if you do separate client and server validation is because Server Side validation would need to be written in CFML (this runs on the server), and client side validation would be written in JavaScript (this runs on the client). You cannot execute CFML code on the clients, and you cannot execute Javascript serverside. RUss -----Original Message----- From: Claude Schneegans [mailto:[EMAIL PROTECTED] Sent: 16 October 2006 13:41 To: CF-Talk Subject: Re: Form Validation Custom Tag >>As an AJAX call only sends/returns a very small amount of data, it is very quick, The overhead is not caused by the amount of data, but just by the operation of calling the server. And also the fact that the server now has the overhead instead of the user. >>and is still quicker than server side only validation if the client has Javascript enabled. How could it be ? The server side validation will be done by the template called by the form. This template has to be executed anyway to process the form, so even if it also does validation first, it will still be more efficient than calling two templates, one for validation, the otheone for procesing the data. >>It means you do not have to write two separate validation routines, Why two routines? What was validated on client side must not be revalidated on server. Things that should be validated on server are not the same. -- _______________________________________ REUSE CODE! Use custom tags; See http://www.contentbox.com/claude/customtags/tagstore.cfm (Please send any spam to this address: [EMAIL PROTECTED]) Thanks. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Introducing the Fusion Authority Quarterly Update. 80 pages of hard-hitting, up-to-date ColdFusion information by your peers, delivered to your door four times a year. http://www.fusionauthority.com/quarterly Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:256878 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
