Overwrite XML data Using AS3

[WatsonjWT2013]

I have a file called temp.xml saved out on localhost (I'm running wamp for testing), and it has this in it:

<?xml version="1.0" encoding="utf-8"?>
<1>
<SAVEDATA pos="1"/>
</1>

The idea is, that as you get to checkpoints pos="" would be updated. I can't seem to figure out how to actually edit this. The reason SAVEDATA is within <1> is because I also wanted it to somehow assign a unique ID to each player (There's a login system), and when you login, it checks your ID, and continues the game from where you left off.

[kglad]

do you want to add the SAVEDATA node or edit its pos attribute?

p.s. that xml should have a wrapper node and you should not use a number for a node name.  use something like:

<?xml version="1.0" encoding="utf-8"?>

<players>

<player id="1">

<SAVEDATA pos = "1"/>

</player>

</players>

[WatsonjWT2013]

I want to edit the pos attribute, and thanks for the heads up.

[kglad · Accepted solution]

if you use the xml like i showed, you can use the following to load and edit the pos attribute:

// load it

var urlLoader:URLLoader = new URLLoader();

urlLoader.addEventListener(Event.COMPLETE,f);

urlLoader.load(new URLRequest("test2.xml"));

var xml:XML;

function f(e:Event):void{

xml = XML(e.target.data);

}

// edit xml:  (for example to change player with id="3" to have pos="7", use editXMLF(3,7);

// you don't need to change any code above or below except the parameters you pass when you call editXMLF

function editXMLF(playerID:int, newPOS:int):void{

xml.player.(@id==playerID.toString()).SAVEDATA.@pos = newPOS;

}

[WatsonjWT2013]

Wouldn't it be:

xml.players.player.(@id==playerID.toString()).SAVEDATA.@pos = newPOS;

because player is within players.

Regardless, it isn't working for me.

player.addEventListener(MouseEvent.CLICK, addNumber);

function addNumber(Mouse:Event):void

{

          editXMLF(2, 4);

          trace("gfrvsg");

}

player is an object on stage, and the trace was simply to make sure I was clicking it.

[kglad]

no, it should be exactly as i showed.  the wrapper node is assigned to the variable xml. 

and what makes you think it's not working?  ie, what did you do to test?  (hint: use a trace(xml) statement to confirm it's working.)

[WatsonjWT2013]

I used a mouse click function on my player and the xml never updated.

I also tried trace(xml), and it returned "null"

[kglad]

copy and paste the code you're using.

[WatsonjWT2013]

//XML Loading

var urlLoader:URLLoader = new URLLoader();

urlLoader.addEventListener(Event.COMPLETE,f);

urlLoader.load(new URLRequest("temp.xml"));

var xml:XML;

function addNumber(Mouse:Event):void

{

          editXMLF(2, 4);

          trace("gfrvsg");

}

function f(e:Event):void{

          xml = XML(e.target.data);

}

// edit xml:  (for example to change player with id="3" to have pos="7", use editXMLF(3,7);

// you don't need to change any code above or below except the parameters you pass when you call editXMLF

function editXMLF(playerID:int, newPOS:int):void

{

          xml.player.(@id==playerID.toString()).SAVEDATA.@pos = newPOS;

}

trace(xml);

[kglad]

1. nothing's calling addNumber.  therefore, nothing's calling editXMLF.

2. your trace(xml) should return null because it's executing before, temp.xml completes loading and xml is defined.

p.s. i'm  not trying to give you a hard time.  but, the code i suggested works.  you're not using it correctly.  almost certainly, you're trying to use editXMLF before your xml file is defined or, you're trying to edit a player id that doesn't exist in your xml.

[WatsonjWT2013]

I had this on the top of my file (after imports and stop();)

player.addEventListener(MouseEvent.CLICK, addNumber);

I just didn't include it.

Now it changes the value in flash, but it's not saving to file.

[kglad]

so, as long as you click that after loading is complete (highly likely), the code i suggested should work.

if you also want to save that changed xml to temp.xml, use:

var fRef:FileReference=new FileReference();

function editXMLF(playerID:int, newPOS:int):void{

xml.player.(@id==playerID.toString()).SAVEDATA.@pos = newPOS;

fRef.save(xml,"temp.xml");

}

[WatsonjWT2013]

It prompts me to save the file from localhost. I don't want a game that consistantly prompts you everytime the game saves.

[kglad]

are you saving the xml file onto a server?

if yes, use the urlloader class and call a server-side script that saves your file.

[WatsonjWT2013]

I have it on localhost via WAMP, so it'd be saving to 127.0.0.1/xmlDoc.xml

But I don't have a server sided script for it. I'd assume it should be done in php

[kglad]

yes, most servers support php.

if you post your xml variable as xmlVar, you can use:

<?php

foreach ($_POST as $key => $value) {

   $$key = $value;

}

$file = "temp.xml";

$fh = fopen($file, 'w') or die("can't open file");

fwrite($fh, $xmlVar);

fclose($fh);

?>

[WatsonjWT2013]

I found a way to load via php to MySQL, which seems to work perfectly. I just need to figure out how to save it.