How can i implement AJAX functionality in Flex

Question

Hi, I have a requirement like when I type 2 characters in email field if that email id exists in DB then I need to show remaining emails starting with those characters needs to display in dropdown list. Like Tags part in stackoverflow.com site, Is it possible in flex this functionality? Please suggest me thanks in advance

Answer 1

http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&extid=1047291

Answer 2

Short answer: Yes, you can. Long answer: AJAX means Asynchronous JavaScript and XML but what you want is asynchronous behavior and remote data retrieval. You can easily achieve the asynchronous part in flex by adding an event handler to your input box listening for a change event:

 <mx:Textfield change="changeEventHandler(event)" />

Every time the text in the input field changes this event handler gets called. All you have to do then is talk to a remote server and ask for matching email addresses. And here you really have a lot of options, ranging from "big" solutions like ColdFusion, BlazeDS or GraniteDS to smaller solutions -- you probably want something like this -- like the HTTPService class which lets you connect to HTTP services.

In order to store data, e.g. the user name locally, you can use Flash's SharedObject which behaves pretty much like a cookie. However, it lets you store arbitrary data, so it's way more flexible.