Lesson 25. Debugging Flex Applications

What You Will Learn

In this lesson, you will:

• Learn how to use the <mx:TraceTarget> tag to view server-client communication

• Use the debugger in Flex Builder in new ways

• Handle errors using the try-catch-finally statements

Approximate Time

This lesson takes approximately 1 hour and 30 minutes to complete.

Lesson Files

Media Files:

None

Starting Files:

Lesson25/start/DataEntry.mxml

Lesson25/start/EComm.mxml

Lesson25/start/as/ecomm.as

Completed Files:

Lesson25/complete/DataEntry.mxml

Lesson25/complete/EComm.mxml

Lesson25/complete/as/ecomm.as

Bugs will occur when developing your applications. In this lesson, you will take two approaches to these bugs. The first part of the lesson gives you insight into how to find bugs and apply what you have learned in the rest of the book to correct them. In the rest of the lesson, you learn how to handle bugs that slip by and programmatically catch them at run time using error handling with the try-catch-finally statements.

Using the debugger to search for properties beginning with the letter "t."