How to alter text files on your hard drive with as3

This uses the FileReference class, and shows how to access a text file, and save a text file.
To access the text file:

var fr:FileReference = new FileReference(); //if this is created within a function, it won't work
//because it really only exists within that function

function lFile(evnt:MouseEvent):void {//this function has to be initiated by the user

fr.addEventListener(Event.SELECT, seld); //the method that will be called when the user selects a file.
fr.browse(); //this opens up the dialog box


}


function seld(evnt:Event):void {


fr.addEventListener(Event.COMPLETE, compd);
fr.load(); //makes the file available to the swf

}


function compd(evnt:Event):void {


outpt.text = String(fr.data);


}


The uploading of a file has to be initiated by the user, e.g. by clicking a button.



To save some text to a file:

var fr2:FileReference = new FileReference();


function sFile(evnt:MouseEvent):void {//again, this has to be called by the user

fr2.save(outpt.text, 'textfile.txt');//second parameter is optional

}

One odd thing I noticed with this, by specifying what I wanted the text file to be called, if I accepted that name in the saveas dialog box, then it was fine, even though the '.txt' was not shown in the dialog box. If, however I changed the name to something else, then I had to add the '.txt' myself, or it wouldn't know what kind of file it was supposed to be. (So if I go to Windows Explorer, it doesn't have the right icon, and when I try to open it from there, I get asked what program should be used.)