FileSystemwatcher Filter

alex

I'm busy creating a app to monitor files on the HDD. My question is how do i specify multiple filter types. i.e. for the system to look out for all .txt and all .xml files ?

2 Replies

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Ravi Puri20y ago
Rightly so, you probably want to perform a custom filter inside the appropriate handler and ignore completely the

FileSystemWatcher.Filter method:

FileSystemWatcher watcher = new FileSystemWatcher();

watcher.Path = @"C:\";
watcher.Created += new FileSystemEventHandler(OnCreated);
watcher.EnableRaisingEvents = true;

private static void OnCreated(object source, FileSystemEventArgs e)
{
if (e.Name.Substring(e.Name.LastIndexOf('.')) == ".xml")
{
...
}

if (e.Name.Substring(e.Name.LastIndexOf('.')) == ".txt")
{
...
}
...
}
Anthony Frayling20y ago
The answer is - you can't. At least not with a single watcher. The filter is a single pattern matcher, not a list. It's easier to do your own filtering of events as they are generated.

Anthony