Design App question
Hellofirst post for me in this forum. Recently, I got a copy of flex mostly to try the new apollo, run time. I catch up with the new AS 3.0 language and mxml (I just flash8). Now I'm porting an applicaton I developed in Flash (a very simple, I'm not a pro) with the help of Apollo and the remote object with the AMFPHP 1.9. Everything works very well expect a fault very little, I can't seem to solve. I created an application of assistant using the viewStack item type. The viewStack contains 4 'pages' and the comboboxes datagrids located inside some of them are supplemented with data from MySQL using AMFPHP. On the "latest" page, I have a datagrid that captures the data based on the selection, the user did on the first page using a combobox control. What happens is that whenever I run the application, the first time that a change event is dispatched to the combobox, I get an error. I think it's because the change event calls a remote method and its outcome, it is supposed to go the datagrid on the "last" page that has not been created yet by flex, so give me an "Error #1009: cannot access a property or method of a null object reference." What I don't understand, is that if I reject the error and use the combobox control again the DataGrid is updated very well. My question is, is it possible to get this datagrid on the last page initialized at the start of the application? I thought that if I initialized before it gets posted, I shouldn't get the erro, right?. I don't know if it's the best way to do it, so if you have any other suggestions it would be awesome. Thank you for your time and sorry for the long post!
Hello
You understand the problem well enough and I don't want to immediately give you the simplest solution, but I want to give you the best solution.
I propose to keep the separate data from the view in a separate category called :) MyData.as where you can place all ArrayCollections, strings, numbers and etc.
When you interact with the user interface on every page controls, whenever you go to a new page update of data inside myData.as.
On the last page, link your data grid to the data source in myData.as
public static class {MyData
[Bindable]
public var users: ArrayCollection collection;
}
Tags: Flex
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