CODEWITHSUNDEEP
c#filesystemwatcher
Joe A
Joe A

Reputation: 31

FileSystemWatcher IncludeSubdirectories not working on network share

I'm attempting to watch a network share for folders where a file is added to the share to indicate the upload is complete. I wanted to use a FileSystemWatcher to monitor that share and its subdirectories for that trigger file, as shown below.

FileSystemWatcher fsw = new FileSystemWatcher(share, triggerFilePattern);
fsw.IncludeSubdirectories = true;
fsw.Created += new FileSystemEventHandler(OnCreated);
fsw.Renamed += new RenamedEventHandler(OnRenamed);
fsw.Error += new ErrorEventHandler(OnError);

If a file is created at the root of the share, the event triggers. If a file is created within a subdirectory of the share, the event does not trigger, and I don't get an error either.

If I create a new FileSystemWatcher for that subdirectory, then I do receive an event when a file is created there. But, similar to the top level FileSystemWatcher, I won't get events for files created in any further subdirectories.

If I change the network share to a local directory for testing, it does work as expected.

Any ideas? Could I have set up some wonky network share setting that blocks recursive FileSystemWatcher checks? I can work around this, but it would be nice to not have to complicate the code.

Edit: I saw that I didn't have Full Control under Properties->Security tab, so I thought that could be it. But I was able to get normal desired behavior on a different share with the same visible permissions, so I'm back to not knowing why this specific share isn't working.

Edit2: At a coworker's suggestion, I added a Changed handler too. Doesn't make sense to me how a file can be changed without getting Created first, but... I'm getting Changed events on the share in question when creating files in a subdirectory. (And I'm still getting nothing when renaming them.) This solves my immediate problem, but I'm going to leave the question open in case someone's able to answer why that's happening.

Upvotes: 3

Views: 3830

Answers (2)

Tomislav Medved
Tomislav Medved

Reputation: 33

I had same problem and I solved it by giving write permission to the shared network folder (it had only read permission so far). Shared folder is originally on Linux but I have it mounted on Windows Server 2008 R2 where I'm running program with FileSystemWatcher.

Upvotes: 0

user2148124
user2148124

Reputation: 970

Try this

 private static FileSystemWatcher fw;
 static void Main(string[] args)
       {
            fw = new FileSystemWatcher(@"D:\Folder_Watch");
            fw.IncludeSubdirectories = true;
            fw.NotifyFilter = NotifyFilters.LastAccess |
     NotifyFilters.LastWrite | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            fw.Created += fw_Created;
            fw.Changed += fw_Created;
            fw.Renamed += fw_Created;
            fw.Filter = "*.*";
            fw.EnableRaisingEvents = true;

            new System.Threading.AutoResetEvent(false).WaitOne();        
        }

 static void fw_Created(object sender, FileSystemEventArgs e)
        {
            try
            {
                fw.EnableRaisingEvents = false;
                //Your Code
            }
            finally
            {
                fw.EnableRaisingEvents = true;
            }
        }

Upvotes: 1

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