Hi,
I have a fileWatcher set as follow:
Private Sub setupFilewatcher()
Dim info As New System.IO.FileInfo(AppDomain.CurrentDomain.SetupInformation.ConfigurationFile)
Dim path As String = info.DirectoryName
Dim file As String = info.Name
Try
watcher = New System.IO.FileSystemWatcher(path)
watcher.Filter = file
watcher.NotifyFilter = IO.NotifyFilters.LastWrite
watcher.EnableRaisingEvents = True
Catch e As Exception
'Do nothing...
End Try
End Sub
My problem is that the event watcher.changed is fired 4 times when a save occur in the file. I need to catch only 1 event and not 4 times the same event.
Any ints
Tanks
Sylvain
File Watcher
Ganeshm
Hi
The file system watcher notifies you each time the last write is changed (measured internally within a very small time frame) .... it just sounds like your config file is updated 4 times for some reason.
I guess you need to implement some kind of internal filter if the event 'spamming' is undesired. Perhaps each time the event is raised, you reset some kind of flag and the date you changed it and have a background thread monitor it. If the file is changed and the timespan between now and the last updated time is greater than x seconds, do your work.
It is perhaps an undesirable solution, but the FSW class is doing exactly what you have asked it to do.
Good luck
Richard
bonus
The Changed event is raised when changes are made to the size, system attributes, last write time, last access time, or security permissions of a file or directory in the directory being monitored.
Common file system operations might raise more than one event. For example, when a file is moved from one directory to another, several OnChanged and some OnCreated and OnDeleted events might be raised. Moving a file is a complex operation that consists of multiple simple operations, therefore raising multiple events. Likewise, some applications (for example, antivirus software) might cause additional file system events that are detected by FileSystemWatcher.
Use NotifyFilter to restrict the number of notifications raised when this event is handled.
Tryin2Bgood
As you can see I use the lastWrite filter wich works fine.
The problem is that while I test the code in debug. When I modified and save the file that is monitored, the changed event is fired about 4 times.
I can not use the other filter because they don't apply.
If there is no way to work with the FileWatcher, why would Microsoft made a class for it
ks2006