FLASH® LITE™ 2.x - Adobe Help and Support

The following example demonstrates a try..catch statement. The code within the try
block is executed. If an exception is thrown by any code within the try block, control passes
to the catch block, which shows the error message in a text field using the
Error.toString() method.
In the same directory as Account.as, create a new FLA document and enter the following
ActionScript in Frame 1 of the Timeline:
import Account;
var account:Account = new Account();
try {
var returnVal = account.getAccountInfo();
if (returnVal != 0) {
throw new Error("Error getting account information.");
}
trace("success");
}
catch (e) {
this.createTextField("status_txt", this.getNextHighestDepth(), 0, 0, 100,
22);
status_txt.autoSize = true;
status_txt.text = e.toString();
}
The following example shows a try code block with multiple, typed catch code blocks.
Depending on the type of error that occurred, the try code block throws a different type of
object. In this case, myRecordSet is an instance of a (hypothetical) class named RecordSet
whose sortRows() method can throw two types of errors, RecordSetException and
MalformedRecord.
In the following example, the RecordSetException and MalformedRecord objects are
subclasses of the Error class. Each is defined in its own AS class file.
// In RecordSetException.as:
class RecordSetException extends Error {
var message = "Record set exception occurred.";
}
// In MalformedRecord.as:
class MalformedRecord extends Error {
var message = "Malformed record exception occurred.";
}
Within the RecordSet class's sortRows() method, one of these previously defined error
objects is thrown, depending on the type of exception that occurred. The following example
shows how this code might look:
class RecordSet {
function sortRows() {
var returnVal:Number = randomNum();
if (returnVal == 1) {
204 ActionScript language elements