Here's a painfully simple implementation. If you are comfortable in JS, than
all this should make sense to you and if there's something you don't
understand, send me an offlist message... watch for wrap.
Usage:
sendAjaxRequest("myurl.cfm", JSFunction, JSObjectAsParameters)
<script type="text/javascript">
<!--
function GetXmlHttp() {
var xmlhttp = false;
if (window.XMLHttpRequest)
{
xmlhttp = new XMLHttpRequest()
}
else if (window.ActiveXObject)// code for IE
{
try
{
xmlhttp = new ActiveXObject("Msxml2.XMLHTTP")
} catch (e) {
try
{
xmlhttp = new ActiveXObject("Microsoft.XMLHTTP")
} catch (E) {
xmlhttp=false
}
}
}
return xmlhttp;
}
function sendAjaxRequest(url, statusCallback, paramsObject)
{
var xmlhttp = new GetXmlHttp();
//now we got the XmlHttpRequest object, send the request.
if (xmlhttp)
{
xmlhttp.onreadystatechange = function ()
{
var functionToCall = statusCallback + '(\'\', false)';
//
if (xmlhttp && xmlhttp.readyState==4)
{//we got something back..
if (xmlhttp.status==200)
{
//Return this to handle your own parsing...
var responseText = xmlhttp.responseText;
var response = eval(xmlhttp.responseText);
//
if (typeof(response) == "object") {
functionToCall = statusCallback + '(response, true)';
}
} else {
functionToCall = statusCallback + '(\'\', false)';
}
}
else {
functionToCall = statusCallback + '(\'\', false)';
}
eval(functionToCall);
}
// Generate parameters string
//
var sendVars = "";
for (var i in paramsObject) {
sendVars += i+"="+escape(paramsObject[i])+"&";
}
// Generate and send request
//
xmlhttp.open("POST",url,true);
xmlhttp.setRequestHeader('Content-Type',
'application/x-www-form-urlencoded');
xmlhttp.send(sendVars);
}
}
-->
</script>
!k
-----Original Message-----
From: Jeff Small [mailto:[EMAIL PROTECTED]
Sent: Friday, October 06, 2006 12:59 PM
To: CF-Talk
Subject: Ajax and CF...*sigh*...again...
I know, I know...asked about a ZILLION times...but here's all I want.
1. I'm a CF programmer who doesn't use any kind of framework (okay, please
let's not go off on THAT tangent). I'm a formally taught CompSci grad dude
who's been using CF now for about ten years, never messed with ASP, never
messed with PHP, etc... I'm just 100% CF and I roll all my own.
2. I'm a reasonably good Javascript programmer who's done what I'd call
"intermediate" JS, but nothing really super DOM heavy.
3. I'm really interested in Ajax, but I want to learn it from a "CF Coder
who uses Dreamweaver as his main IDE" point of view.
4. I'd love to see just a simple site or page with an overview of the
options for a CF programmer who wants to get into Ajax. Maybe something
comparing the various AJAX frameworks out there, or how other CF'ers who
don't normally use any kind of existing framework are getting into it. Maybe
some simple tutorials to get you to that "AHA" moment...
Does this sound like too much to ask? Does such a thing exist, or have I
finally discovered a reason to blog? lol... (Jeff's experience getting into
Ajax Blog)...
--
Jeff Small
LHWH Advertising
Myrtle Beach, SC 29577
843-448-1123 Ext 254
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