Daemach,
I suppose it's just for the sake of education or something, but putting
the return value in a structure and passing it back seems like overkill
to me. Since there can be only one result from the calculation, just
pass it back as a string or numeric... no need for a structure in this
case imo.
Rick, is any of this helping? :o)
Chris
Daemach wrote:
Hi Rick -
This is one of those things I would use ajaxCFC for since it handles
serialization automatically. The idea here is that you need to serialize
the values of your form fields, send them to the server, deserialize,
calculate and put the results into some kind of structure which gets
serialized again and returned to the browser for processing which starts
with deserializing. Dealing with the serialization/deserialization
transparently is what makes ajaxCFC so great.
First, download ajaxcfc here:
http://www.robgonda.com/blog/projects/ajaxcfc/download.cfm
in the zip file drill down to ajaxCFC/branches/jquery/core/. Put the .cfc's
in some accessible folder on your web server, then copy everything inside
the /js folder to your javascript repository - I create a subfolder to keep
it separate: /js/ajaxCFC. That's it for the install.
This sample code should get you started. I stuck the ajax call directly
into the click event on the button, but you could put all of that in a
separate function and then call the function from the click event handler if
you want.
===========================
your html/cfm page with the calculator:
<script type="text/javascript" src="/js/jquery.js"></script>
<script type="text/javascript" src="/js/ajaxCFC/jquery.AjaxCFC.js"></script>
<script type="text/javascript">
// additional files
$.AjaxCFC({require:'json'});
// more additional files
// $.AjaxCFC({require:'json,wddx,dDumper,log4j,DWRSyntax,blockUI'});
// optional global settings
// using these setters also automatically include dependencies
//$.AjaxCFCHelper.setAjaxLoadImage("#snort","/images/ajax_circleball.gif");
$.AjaxCFCHelper.setDebug(false);
$.AjaxCFCHelper.setBlockUI(false);
$.AjaxCFCHelper.setUseDefaultErrorHandler(false);
$.AjaxCFCHelper.setSerialization('json'); // json, wddx
$(document).ready( function() {
// Add click event to button
$('#ajaxit').click(function() {
//create an object to pass to the cfc. can also be an array,
simple
value, whatever you want. Objects turn into cf structures.
var obj = {firstVal:$('#firstVal').val(),
secondVal:$('#secondVal').val(),
thirdVal:$('#thirdVal').val(), randomstring:"why not"}
//do ajax call
$.AjaxCFC({
url: "/pathto/your.cfc",
method: "calculate",
data: obj,
// can be an anonymous function, or the name of the function that will
handle the return results.
success: showResults
});
});
});
function showResults(data){
// data will be whatever the cfc passed back in js format - structure in
this case to make it easy.
$('#result').val(data.results);
}
</script>
firstVal: <input id="firstVal" name="firstVal" type="text"><br>
secondVal: <input id="secondVal" name="secondVal" type="text"><br>
thirdVal: <input id="thirdVal" name="thirdVal" type="text">
<input id="ajaxit" type="submit" name="ajaxit" value="AjaxIt">
<hr>
result: <input id="result" name="result" type="text">
================
Your cfc file should go in the same folder as ajax.cfc:
<cfcomponent extends="ajax">
<!---
<cfscript>
setDebugMode('request');
</cfscript>--->
<cffunction name="calculate" output="no" access="private">
<cfscript>
obj = arguments;
data = structNew();
temp = obj.firstVal + obj.secondVal + obj.thirdVal;
StructInsert(data, "results", temp);
</cfscript>
<cfreturn data>
</cffunction>
</cfcomponent>
Rick Faircloth wrote:
Hi, all.
I've just started using jQuery recently and now
I'm trying to understand how to use it with AJAX
and I just don't know enough about how it works
to get started on a fairly simple app. The sample app I've
been tinkering with sends a URL variable for a User_ID
using AJAX to a CF page, which runs a query and
returns the info to the calling page and appends
it to the body. I'd like to send results back to the
form fields, as well as the calculated result.
I just don't have a clue how to set this up.
I have a mortgage calculator and I want the user
to be able to enter the principal, interest rate,
and duration in years, then run a calculation on it
and return the result.
I've set this up in a regular form that submits back
to the page it's on and it works fine. It's coded in CF.
I'd like to be able to calculate and return the results using AJAX.
I've worked some very simple code using AJAX (actually
it was given to me), but I have no idea how to code for
the above scenario.
Would anyone care to give this CF'er some guidance
on creating this small jQuery/CF/AJAX app?
Thanks for any help!
Rick
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