File lock

mstampar (Miroslav Stampar) — Mon, 14 May 2007 22:29:42 GMT

Lock files so that no one else can access it:



 string filename = "c:\\sample.htm";

 FileStream stream = new FileStream(filename, FileMode.Open, FileAccess.Read, 

 FileShare.None); //locks file



 ...



 stream.Close(); //unlocks file



 string filename = "c:\\sample.htm";

 FileStream stream = File.Open(filename, FileMode.Open);

 stream.Lock(0, stream.Length); //locks file



 ...



 stream.Unlock(0, stream.Length); //unlocks file

Open another app as content handler

korakot (Korakot Chaovavanich) — Mon, 11 Apr 2005 04:44:37 GMT

Current python for series 60 (version 1) doesn't support graphics drawing on screen. But it still allows you to open an image file or other content file using external content handler. Here is the short and shorter versions to demonstrate.



# this version wait for external app to exit, then it continue.

import e32

lock = e32.Ao_lock()

handler = appuifw.Content_handler(lock.signal)

hander.open(filename)  # eg. an image file

lock.wait()	# wait for lock.signal to unlock



# this is a short, one-line version which doesn't wait

appuifw.Content_handler().open(filename)

DZone Snippets: lock code

File lock

Open another app as content handler