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476 Chapter 6: ActionScript Core Classes

Returns

Nothing.

Description

Method; encodes the specified XML object into an XML document, sends it to the specified

URL using the

POST method, downloads the server’s response, and loads it into the

targetXMLobject specified in the parameters. The server response loads in the same manner

used by the

XML.load() method.

The value you pass for the

url parameter must be in exactly the same domain. For example, a

SWF file at www.someDomain.com can load data only from sources that are also at

www.someDomain.com. If you want to load data from a different domain, you can place a cross-

domain policy file on the server that is hosting the SWF file. For more information, see “Applying

Flex Security” in Developing Flex Applications.

When

sendAndLoad() is executed, the XML object property loaded is set to false. When the

XML data finishes downloading, the

loaded property is set to true if the data successfully

loaded, and the

onLoad event handler is invoked. The XML data is not parsed until it is

completely downloaded. If the XML object previously contained any XML trees, they are

discarded.

Example

The following example includes ActionScript for a simple e-commerce storefront application.

The

XML.sendAndLoad() method transmits an XML element that contains the user’s name and

password, and uses an

onLoad handler to process the reply from the server.

var login_str:String = "<login username=\""+username_txt.text+"\"

password=\""+password_txt.text+"\" />";

var my_xml:XML = new XML(login_str);

var myLoginReply_xml:XML = new XML();

myLoginReply_xml.ignoreWhite = true;

myLoginReply_xml.onLoad = myOnLoad;

my_xml.sendAndLoad("http://www.flash-mx.com/mm/login_xml.cfm",

myLoginReply_xml);

function myOnLoad(success:Boolean) {

if (success) {

if ((myLoginReply_xml.firstChild.nodeName == "packet") &&

(myLoginReply_xml.firstChild.attributes.success == "true")) {

gotoAndStop("loggedIn");

} else {

gotoAndStop("loginFailed");

}

} else {

gotoAndStop("connectionFailed");

}