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DEVELOPING COLDFUSION 9 APPLICATIONS
Requesting and Presenting Information
<!--- Action code. First make sure the form was submitted. --->
<cfif isDefined("form.saveSubmit")>
<cfif isValid("integer", form.UserID) and isValid("email", form.emailAddr)
and isValid("telephone", form.phoneNo)>
<cfoutput>
<!--- Application code to update the database goes here --->
<h3>The e-mail address and phone number for user #Form.UserID#
have been added</h3>
</cfoutput>
<cfelse>
<H3>Please enter a valid user ID, phone number, and e-mail address.</H2>
</cfif>
<cfelse>
</cfif>
<!--- The form. --->
<cfform action="#CGI.SCRIPT_NAME#">
User ID:<cfinput type="Text" name="UserID"><br>
Phone: <cfinput type="Text" name="phoneNo"><br>
E-mail: <cfinput type="Text" name="emailAddr"><br>
<cfinput type="submit" name="saveSubmit" value="Save Data"><br>
</cfform>
Examples: cfparam tag validation
The following two examples use
page 762. They check whether a user has submitted a numeric ID and a valid e-mail address and phone number. If any
of the submitted values does not meet the validation test, ColdFusion throws an expression exception.
In the first example, the error is handled by the exprerr.cfm page specified in the
made multiple errors, ColdFusion lists only one.
In the second example, each invalid field is handled in a separate try/catch block. In this case, the user gets information
about each error.
Using an error-handling page
The self-posting form and action page looks as follows:
tags to do the same tests as in the
cfparam
Last updated 8/5/2010
"Example: IsValid function
validation" on
tag. In this case, if the user
cferror
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