[Flex] Save File

Save File in Adobe Flex -AIR

<?xml version=”1.0″ encoding=”utf-8″?>

<mx:WindowedApplication xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute” creationComplete=”onCreate(event)”><mx:Script><![CDATA[import flash.filesystem.FileMode;import flash.filesystem.FileStream;import flash.filesystem.File;
private function onCreate(e:Event):void
{
var file:File = File.desktopDirectory; //Set the Directory location to Desktop
file = file.resolvePath("test.txt"); //File Name
var fileStream:FileStream = new FileStream();   // Create new FileStream to Perform Read or Write
fileStream.open(file, FileMode.WRITE); // Open file in WRITE Mode
fileStream.writeUTFBytes("Hello World"); //Write Hello World into test.txt 
fileStream.close(); //Close the File Stream
}
]]></mx:Script>
</mx:WindowedApplication>

This code creates a file named test.txt with content “Hello World” in desktop folder.

The desktopDirectory property provides a way to reference the desktop directory that works across platforms. If you set a File object to reference the desktop directory using the nativePath or url property, it will only work on the platform for which that path is valid Similarly documentDirectory /applicationStorageDirectory /applicationDirectory can be used to represent the folder.

var file:File = new File();
file = file.resolvePath(“c:\\test.txt”);



http://www.flex-blog.com/save-data-to-file-system-with-air-in-flex-4/
 private function save():void
            {
                // Create file object
                file = File.documentsDirectory.resolvePath(directory + "\\" + fileName);
                // FileStream for writing the file
                fileStream = new FileStream();
                // Open the file in write mode
                fileStream.open(file, FileMode.WRITE);
                // Write the ArrayCollection object of persons to the file
                fileStream.writeObject(persons);
                // Close FileStream
                fileStream.close();
            }
            
            private function read():void
            {
                // Get hte correct path
                file = File.documentsDirectory.resolvePath(directory + "\\" + fileName);
                
                // read the file if it exists
                if(file.exists)
                {
                    // FileStream for reading the file
                    fileStream = new FileStream();
                    // Open the file in read mode
                    fileStream.open(file, FileMode.READ);
                    // Read the ArrayCollection object of persons from the file
                    persons = fileStream.readObject() as ArrayCollection;
                    // Close the FileStream
                    fileStream.close();
                }
                else
                {
                    // some sample data + save if file does not exist
                    persons = new ArrayCollection();
                    var person:Object = new Object();
                    person.firstName = "John";
                    person.lastName = "Doe";
                    persons.addItem(person);
                    
                    person = new Object();
                    person.firstName = "Peter";
                    person.lastName = "Pan";
                    persons.addItem(person);
                    
                    person = new Object();
                    person.firstName = "Captain";
                    person.lastName = "Hook";
                    persons.addItem(person);
                    save();
                }
            }