FileSystemWatcher Event Bubbling

Question

I am using FileSystemWatcher to watch the incoming images (thru FTP) to the folder, where I am re-sizing the incoming images.

The problem is, I am re-sizing the images by overwriting the original images; because of this FileSystemWatcher is continuously creating changed events. I want to suppress the FileSystemWatcher events while i am working on re-sizing and saving the re-sized images. but not while files being copied using FTP, which may happen simultaneously. The incoming image count may reach up to 3000+ ...and I can not wait for more time to start processing.

Can anybody give me any solution to this.

Regards,

Amit Jog

Answer 1

Private thisFile as String = ""

' when resizing/etc:

thisFile = Name_of_file

Watcher event:

Private Sub FileChanged(ByVal source As Object, ByVal e As  _
                System.IO.FileSystemEventArgs)

    If e.FullPath.ToUpper = thisFile.ToUpper then exit sub
   ...

End Sub

You could also store all unprocessed images in a List(of String) and exempt them all as long as they are in the list (remove them when finished):

   If myList.Contains(e.FullPath.ToUpper) Then Exit Sub

Answer 2

Set the FileSystemWatcher.NotifyFilter Property to NotifyFilters.CreationTime.