CFSWITCH |
Description
Evaluates a passed expression and passes control to the cfcase tag that matches the expression result. You can, optionally, code a cfdefaultcase tag, which receives control if there is no matching cfcase tag value.
Category
Flow-control tags
Syntax
    <cfswitch
       expression = "expression">
          one or more cfcase tags
          zero or one cfdefaultcase tags
    </cfswitch>
See also
cfcase, cfdefaultcasealso cfabort, cfloop, cfbreak, cfrethrow, cfexecute, cfexit, cfthrow, cfif, cftry, cflocation
History
ColdFusion MX: Changed cfdefaultcase tag placement requirements: you can put the cfdefaultcase tag at any position within a cfswitch statement; it is not required to be the last item.
Usage
This tag requires an end tag. All code within this tag must be within a cfcase or cfdefaultcase tag. Otherwise, ColdFusion throws an error.
Use this tag followed by one or more cfcase tags. Optionally, include a cfdefaultcase tag. This tag selects the matching alternative from the cfcase and cfdefaultcase tags, jumps to the matching tag, and executes the code between the cfcase start and end tags.
The cfswitch tag provides better performance than a series of cfif/cfelseif tags, and the code is easier to read.
Example
    <!--- This example shows the use of cfswitch and cfcase to
    exercise a case statement in CFML --->
    <cfquery name = "GetEmployees" dataSource = "cfsnippets">
       SELECT Emp_ID, FirstName, LastName, EMail, Phone, Department
       FROM   Employees
    </cfquery>

    <h3>cfswitch Example</h3>
    <!--- By outputting the query and using cfswitch, we classify the
    output without using a cfloop construct. --->
    <p>Each time the case is fulfilled, the specific information is printed;
    if the case is not fulfilled, the default case is output </p>
    <cfoutput query="GetEmployees">
    <cfswitch expression="#Trim(Department)#">
       <cfcase value="Sales">
          #FirstName# #LastName# is in <b>sales</b><br><br>
       </cfcase>
       <cfcase value="Accounting">
          #FirstName# #LastName# is in <b>accounting</b><br><br>
       </cfcase> <cfcase value="Administration">
          #FirstName# #LastName# is in <b>administration</b><br><br>
       </cfcase>
       <cfdefaultcase>
          #FirstName# #LastName# is not in Sales, Accounting, or
             Administration.<br><br>
       </cfdefaultcase>
    </cfswitch>
    </cfoutput>

EXPRESSION |
| Required
ColdFusion expression that yields a scalar value. ColdFusion converts integers, real numbers, Booleans, and dates to numeric values. For example, True, 1, and 1.0 are all equal.