Serializes and deserializes CFML data structures to the XML-based WDDX format. The WDDX is an XML vocabulary for describing complex data structures in a standard, generic way. Implementing it lets you use the HTTP protocol to such information among application server platforms, application servers, and browsers.
This tag generates JavaScript statements to instantiate JavaScript objects equivalent to the contents of a WDDX packet or CFML data structure. Interoperates with Unicode.
<cfwddx action = "cfml2wddx|wddx2cfml|cfml2js|wddx2js" input = "inputdata
" output = "result variable name
" topLevelVariable = "top-level variable name for JavaScript
" useTimeZoneInfo = "yes|no" validate = "yes|no" >
cfcollection, cfdump, cfexecute, cfindex, cfobject, cfreport, cfsearch, ToScript; "Using XML and WDDX" in the ColdFusion Developer's Guide
ColdFusion MX
Attribute |
Req/Opt |
Default |
Description |
---|---|---|---|
action |
Required |
|
|
input |
Required |
|
A value to process. |
output |
Required if action = "wddx2cfml" |
|
Name of variable for output. If action = "WDDX2JS" or "CFML2JS", and this attribute is omitted, result is output in HTML stream. |
topLevelVariable |
Required if action = "wddx2js" or "cfml2js" |
|
Name of top-level JavaScript object created by deserialization. The object is an instance of the WddxRecordset object. |
useTimeZoneInfo |
Optional |
yes |
Whether to output time-zone information when serializing CFML to WDDX.
|
validate |
Optional |
no |
Applies if action = "wddx2cfml" or "wddx2js".
|
ColdFusion preserves the case of column names cases in JavaScript.
The wddx2js and cfml2js actions create a WddxRecordset javascript object when they encounter a RecordSet java object. The serialized JavaScript code requires a wddx.js file.
This tag performs the following conversions:
From |
To |
---|---|
CFML |
WDDX |
CFML |
JavaScript |
WDDX |
CFML |
WDDX |
JavaScript |
For more information, and a list of the ColdFusion array and structure functions that you can use to manage XML document objects and functions, see "Using XML and WDDX" in the ColdFusion Developer's Guide.
<!--- This example shows basic use of the cfwddx tag. ---> <html> <body> <!--- Create a simple query. ---> <cfquery name = "q" dataSource = "cfdocexamples"> SELECT Message_Id, Thread_id, Username FROM messages </cfquery> The recordset data is:...<p> <cfoutput query = q> #Message_ID# #Thread_ID# #Username#<br> </cfoutput><p> <!--- Serialize data to WDDX format. ---> Serializing CFML data...<p> <cfwddx action = "cfml2wddx" input = #q# output = "wddxText"> <!--- Display WDDX XML packet. ---> Resulting WDDX packet is: <xmp><cfoutput>#wddxText#</cfoutput></xmp> <!--- Deserialize to a variable named wddxResult. ---> Deserializing WDDX packet...<p> <cfwddx action = "wddx2cfml" input = #wddxText# output = "qnew"> The recordset data is:...<p> <cfoutput query = qnew> #Message_ID# #Thread_ID# #Username#<br> </cfoutput><p>