Description
Determines whether a structure contains data.
Returns
True, if structure is empty; if structure does not exist, ColdFusion throws an exception.
Category
Decision functions, Structure functions
Function syntax
StructIsEmpty(structure) |
See also
Structure functions; Modifying a ColdFusion XML object in the Developing ColdFusion Applications
History
ColdFusion MX: Changed behavior: this function can be used on XML objects.
Parameters
Parameter |
Description |
|---|---|
structure |
Structure to test |
Example
| <!--- This example illustrates use of StructIsEmpty. ---> <p>This file is identical to addemployee.cfm, which is called by StructNew, StructClear, and StructDelete. It adds employees. Employee information is passed through employee structure (EMPINFO attribute). In UNIX, you must also add the Emp_ID. <cfswitch expression = "#ThisTag.ExecutionMode#"> <cfcase value = "start"> <cfif StructIsEmpty(attributes.EMPINFO)> <cfoutput>Error. No employee data was passed.</cfoutput> <cfexit method = "ExitTag"> <cfelse> <!--- Add the employee; In UNIX, you must also add the Emp_ID ---> <cfquery name = "AddEmployee" datasource = "cfdocexamples"> INSERT INTO Employees (FirstName, LastName, Email, Phone, Department) VALUES <cfoutput> ( '#StructFind(attributes.EMPINFO, "firstname")#' , '#StructFind(attributes.EMPINFO, "lastname")#' , '#StructFind(attributes.EMPINFO, "email")#' , '#StructFind(attributes.EMPINFO, "phone")#' , '#StructFind(attributes.EMPINFO, "department")#' ) </cfoutput> </cfquery> </cfif> <cfoutput><hr>Employee Add Complete</cfoutput> </cfcase> </cfswitch> |
