read_async

Asynchronously opens this for reading.

For more details, see read which is the synchronous version of this call.

When the operation is finished, callback will be called. You can then call read_async.end to get the result of the operation.

Example: Read, async:

public static int main (string[] args) {
	MainLoop loop = new MainLoop ();

	File file = File.new_for_path ("my-test.txt");
	file.read_async.begin (Priority.DEFAULT, null, (obj, res) => {
		try {
			FileInputStream @is = file.read_async.end (res);
			DataInputStream dis = new DataInputStream (@is);
			string line;

			while ((line = dis.read_line ()) != null) {
				print ("%s\n", line);
			}
		} catch (Error e) {
			print ("Error: %s\n", e.message);
		}

		loop.quit ();
	});

	loop.run ();
	return 0;
}

valac --pkg gio-2.0 GLib.File.read_async.vala

Parameters:

this	input File
io_priority	the I/O priority of the request
cancellable	optional Cancellable object, null to ignore
callback	a TaskReadyCallback to call when the request is satisfied
user_data	the data to pass to callback function