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Unable to detect a file change with FileSystemWatcher


I have some problems to detect when a file is changed by another application
(the file is changed several times by the application). Sometimes, it is
correctly detected, sometimes not. I maybe expect an access problem. Can it
be? And how to solve it? Below is a part of my code (written in C#). Is there
anybody who can help me?

FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = "C:\\TEMP;
watcher.NotifyFilter = NotifyFilters.LastWrite ;
watcher.Filter = "file1.ini";
mszStatus = "Start";
watcher.Changed += new FileSystemEventHandler(OnChanged);
watcher.EnableRaisingEvents = true;
method.mfStart(); // This will start the external program

// Wait so that the method is completed.
while (String.Compare(mszStatus,"Stop") != 0)


// Define the event handlers.
private void OnChanged(object source, FileSystemEventArgs e)
.... // Look in the file for a specific string
if (....) // If string = finished
mszStatus = "Stop";

Jul 22 '05 #1
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