Question

I want to call a method in flex from javascript side,

so that I can retrieve javascript object which contains data in flex.

now I’m trying like

var result:Object = new Object()
var keyset:Array = data.getKeySet();

for (var i:int = 0 ; i < keyset.length ; i++) {
    result[keyset[i]] = data.get(keyset[i]);
}

return result;

but it do not work. how can I make it right?

p.s. I know it is fundamental question, but I couldn’t find anything even though I googled for an hour. So please help!

Answer 1

I believe you cannot call a method in AS3 from JS directly (and vice-versa). There should be an interface for it though, where one can call the other. If i remember correctly, you should use the ExternalInterface API.

Also, you can’t pass Flex objects to JS (and vice-versa) also. Try building a generic object that is serializable to JSON and use that serialized data in passing data to each other. The receiving party can parse it back to use the data. In this example, the code passed a string from JS to AS3.

In your case, the Flex function would:

• build an object
• stuff it with data
• serialize it into a JSON string
• return the string to the caller

Then when JS calls the function:

• JS receives the string
• Use JSON.parse() to reconstruct the JSON string into a JS object
• use the object