Question

I am trying to access an XMLList item and convert it to am XML object.

I am using this expression:

masonicXML.item.(@style_number == styleNum) 

For example if there is a match everything works fine but if there is not a match then I get an error when I try cast it as XML saying that it has to be well formed. So I need to make sure that the expression gets a match before I cast it as XML. I tried setting it to an XMLList variable and checking if it as a text() propertie like this:

var defaultItem:XMLList = DataModel.instance.masonicXML.item.(@style_number == styleNum);                     if(defaultItem.text())                     {                         DataModel.instance.selectedItem = XML(defaultItem);                     } 

But it still give me an error if theres no match. It works fine if there is a match.

THANKS!

Answer 1

In my experience, the simplest way to check for results is to grab the 0th element of the list and see if it’s null.

Here is your code sample with a few tweaks. Notice that I’ve changed the type of defaultItem from XMLList to XML, and I’m assigning it to the 0th element of the list.

var defaultItem:XML =      DataModel.instance.masonicXML.item.(@style_number == styleNum)[0]; if( defaultItem != null )  {     DataModel.instance.selectedItem = defaultItem; }