Question

So far I know that FileSystemWatcher can look into a folder and if any of the files inside that folder is changed,modifies,.etc… then we can handle it.
But I am not sure which filter and event I should use in my scenario: Watch for a Folder, If a file is added to that folder, do XYZ … So In my scenario I don’t care if an existing file is changed,etc..those should be ignored…only do XYZ if and only if a new file has been added to that Folder…

Which event and filter do you recommended for this scenario?

Answer 1

Set up the watcher:

FileSystemWatcher watcher = new FileSystemWatcher();
watcher.Path = "Blah";

watcher.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
    | NotifyFilters.FileName;

watcher.Created += new FileSystemEventHandler(OnChanged);

watcher.EnableRaisingEvents = true;

Then implement the FileCreated delegate:

private void OnChanged(object source, FileSystemEventArgs e) {
    Console.WriteLine("File: " +  e.FullPath + " " + e.ChangeType);
}