ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with the file system
browseForOpenMultiple()
These methods are each asynchronous. The browseForOpen() and browseForSave() methods dispatch the select
event when the user selects a file (or a target path, in the case of browseForSave()). With the browseForOpen() and
browseForSave() methods, upon selection the target File object points to the selected files. The
browseForOpenMultiple() method dispatches a selectMultiple event when the user selects files. The
selectMultiple event is of type FileListEvent, which has a files property that is an array of File objects (pointing
to the selected files).
For example, the following code presents the user with an “Open” dialog box in which the user can select a file:
var fileToOpen:File = File.documentsDirectory;
selectTextFile(fileToOpen);
function selectTextFile(root:File):void
{
var txtFilter:FileFilter = new FileFilter("Text", "*.as;*.css;*.html;*.txt;*.xml");
root.browseForOpen("Open", [txtFilter]);
root.addEventListener(Event.SELECT, fileSelected);
}
function fileSelected(event:Event):void
{
trace(fileToOpen.nativePath);
}
If the application has another browser dialog box open when you call a browse method, the runtime throws an Error
exception.
Note: On Android, only image, video, and audio files can be selected with the browseForOpen() and
browseForOpenMultiple() methods. The browseForSave() dialog also displays only media files even though the user
can enter an arbitrary filename. For opening and saving non-media files, you should consider using custom dialogs
instead of these methods.
Modifying File paths
Adobe AIR 1.0 and later
You can also modify the path of an existing File object by calling the resolvePath() method or by modifying the
nativePath or url property of the object, as in the following examples (on Windows):
var file1:File = File.documentsDirectory;
file1 = file1.resolvePath("AIR Test");
trace(file1.nativePath); // C:\Documents and Settings\userName\My Documents\AIR Test
var file2:File = File.documentsDirectory;
file2 = file2.resolvePath("..");
trace(file2.nativePath); // C:\Documents and Settings\userName
var file3:File = File.documentsDirectory;
file3.nativePath += "/subdirectory";
trace(file3.nativePath); // C:\Documents and Settings\userName\My Documents\subdirectory
var file4:File = new File();
file4.url = "file:///c:/AIR Test/test.txt";
trace(file4.nativePath); // C:\AIR Test\test.txt
When using the nativePath property, use the forward slash (/) character as the directory separator character. On
Windows, you can use the backslash (\) character as well, but you should not do so, as it leads to code that does not
work cross-platform.
Last updated 6/6/2012
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