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Editor to share to you what is difficult to find silent errors in Flex data binding, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Flex data binding Trap

When building Flex or Adobe AIR programs, automatically passing the value of one object to another is one of the most common and useful features of Flex data binding. However, at the same time, Flex data binding slows down program initialization, and it can cause unexpected problems when developers don't fully understand how data binding mechanisms work. The solution is to make sure you use it correctly and use it only when you need it.

* Article: a silent error that is difficult to find

Some of these binding operations seem to be working, but you are frustrated to find that there are no and no way to modify them.

Exceptions and errors thrown in a binding expression or when a binding method is called in a binding framework are only caught silently. So you won't see any runtime errors in the debug version of Flash Player. Not only does the binding not work, but there is no error display. Why are these errors captured silently? The code implements the binding mechanism and requires several prerequisites before Flex data binding occurs. The binding mechanism eats up any errors to prevent runtime exceptions from being thrown at run time. If you don't want to see these unexpected errors in your program, this is a good thing.

Consider the following simple binding example:

EladElrom 1 Wall Street; protected function handlePreinitialize (): void {xml = null; / / BindingManager.debugBinding ("label.text");}]] >

I have added the xml variable to bind to the Label component. This code will work fine; however, I set the xml variable to null when the component is preinitialized. This event will be dispatched before the component initialization sequence begins, when the Label component has not been set. This xml variable is set to null, so there is no name property on the xml object. If you run this program, you will find that Flex data binding does not occur and does not indicate any errors.

The above is all the contents of the article "what are the silent errors that are difficult to find in Flex data binding?" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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