Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

Troubleshooting
Research
Professional Opinions
Ask a Question
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

troubleshooting Question

How to pass a javascript variable to Cold fusion

Avatar of 14_east
14_eastFlag for United States of America asked on
JavaScriptColdFusion LanguageAJAX
4 Comments1 Solution366 ViewsLast Modified:
I am using a jquery/ajax function to check a username for availability in a database table.  It is working great... but I need to know how to validate the form that the username field resides in.  Currently, if the cfc returns true... it adds text in a div (css driven). Perfect, but if the username is not available, I do not want the user to be able to submit the form.

Obviuosly I can validate forms, but how to do it in this instance??

Any help appreciated...
check.cfm:
_________________________

<script type="text/javascript">
chkUsernameUnique = function(theUsername){
	$.getJSON("/myCFC.cfc", {
		method: 'chkUsername',
		Username: theUsername,
		returnformat: 'json'
	}, function(isUsernameUnique){
	
		if (isUsernameUnique == true) {
			$("#theErrorDivID").html('Please select a new username, that one is taken');
		}
		else {
			$("#theErrorDivID").html('Username is available');
		}
	});
};
</script>

<div id="theErrorDivID"></div>
<input type="text" name="username" id="username" onchange="chkUsernameUnique(this.value);" />


++++++++++++++++++++++++++++++++++++++++++++

.cfc
_____________________
<cfcomponent>
<cffunction name="chkUsername" access="remote" returnformat="json" output="false">
		<cfargument name="Username" required="true">
			
		<cfquery name="chkUsername" datasource="#request.dsn#" username="#request.dsnUsername#" password="#request.dsnPassword#">
		SELECT cst_ID FROM tbl_customers WHERE cst_username = <cfqueryparam value="#arguments.Username#" cfsqltype="cf_sql_varchar" />
		</cfquery>
		
		<cfreturn yesNoFormat(chkUsername.recordCount)>
	</cffunction>
</cfcomponent>
ASKER CERTIFIED SOLUTION
Avatar of Samuel Liew
Samuel LiewFlag of Australia image

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Commented:
This problem has been solved!
Unlock 1 Answer and 4 Comments.
See Answers