| STRUCTKEYLIST | |
| Description
Extracts keys from a ColdFusion structure. |
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| Returns
A list of keys; if structure does not exist, ColdFusion throws an exception. |
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| Category
Structure functions |
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Function syntaxStructKeyList(structure [, delimiter]) |
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| See also
Structure functions; "Modifying a ColdFusion XML object" in Chapter 35, "Using XML and WDDX," in ColdFusion MX Developer's Guide |
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| Parameters
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| Usage
A structure's keys are unordered. |
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Example<!--- This example shows how to use StructKeyList to list the keys
in a structure. It uses StructNew function to create structure
and fills it with information user enters in form fields. --->
<!--- This section creates structure and checks whether Submit has been
pressed.
If so, code defines fields in the employee structure with what the
user entered in the form. --->
<cfset employee = StructNew()>
<cfif Isdefined("Form.Submit")>
<cfif Form.Submit is "OK">
<cfset employee.firstname = FORM.firstname>
<cfset employee.lastname = FORM.lastname>
<cfset employee.email = FORM.email>
<cfset employee.phone = FORM.phone>
<cfset employee.company = FORM.company>
<cfelseIf Form.Submit is "Clear">
<cfset rc = StructClear(employee)>
</cfif>
</cfif>
<html>
<head>
<title>StructKeyList Function</title>
</head>
<body>
<h3>StructKeyList Function</h3>
<h3>Listing the Keys in the Employees Structure</h3>
<p>This example uses StructNew function to create structure "employee" that
supplies employee information. The fields are filled with the
contents of the following form.</p>
<p>After you enter employee information into structure, example uses
<b>StructKeyList</b> function to list keys in structure.</p>
<p>This code does not show how to insert information into a database.
See cfquery for more information about database insertion.
<hr size = "2" color = "#0000A0">
<form action = "structkeylist.cfm">
<table cellspacing = "2" cellpadding = "2" border = "0">
<tr>
<td>First Name:</td>
<td><input name = "firstname" type = "text"
value = "" hspace = "30" maxlength = "30"></td>
</tr>
<tr>
<td>Last Name:</td>
<td><input name = "lastname" type = "text"
value = "" hspace = "30" maxlength = "30"></td>
</tr>
<tr>
<td>EMail</td>
<td><input name = "email" type = "text"
value = "" hspace = "30" maxlength = "30"></td>
</tr>
<tr>
<td>Phone:</td>
<td><input name = "phone" type = "text"
value = "" hspace = "20" maxlength = "20"></td>
</tr>
<tr>
<td>Company:</td>
<td><input name = "company" type = "text"
value = "" hspace = "30" maxlength = "30"></td>
</tr>
<tr>
<td><input type = "submit" name = "submit" value = "OK"></td>
<td><b>After you submit form, scroll down to see the list.</b></td>
</tr>
</table>
</form>
<cfif NOT StructISEmpty(employee)>
<hr size = "2" color = "#0000A0">
<cfset keysToStruct = StructKeyList(employee,"<li>")>
<p>Here are the keys to the structure:</p>
<ul>
<li> <cfoutput>#keysToStruct#</cfoutput>
</ul>
<p>If fields are correct, we can process new employee information.
If they are not correct, consider rewriting application.</p>
</cfif>
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