FileSystemWatcher

Collapse
This topic is closed.
X
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • Peter Kirk
    #1

    FileSystemWatcher

    Hi

    I am trying to use FileSystemWatch er to watch for changes in a directory.
    The problem I am exepriencing is a double firing of an OnChanged event when
    a file is opened, edited, and saved. Why is the event fired twice?

    Here is my code:

    static void Main(string[] args)
    {
    FileSystemWatch er watcher = new FileSystemWatch er();
    watcher.Path = @"g:\watchme ";
    watcher.Filter = "";
    //watcher.NotifyF ilter = NotifyFilters.F ileName | NotifyFilters.L astWrite;
    watcher.Changed += new FileSystemEvent Handler(OnChang ed);
    watcher.Created += new FileSystemEvent Handler(OnCreat ed);
    watcher.Deleted += new FileSystemEvent Handler(OnDelet ed);
    watcher.Renamed += new RenamedEventHan dler(OnRenamed) ;
    watcher.Include Subdirectories = false;
    watcher.EnableR aisingEvents = true;
    Console.Read();
    }
    private static void OnChanged(objec t source, FileSystemEvent Args e)
    {
    Console.WriteLi ne("OnChanged: FullPath=" + e.FullPath + "; Name=" +
    e.Name);
    }
    private static void OnCreated(objec t source, FileSystemEvent Args e)
    {
    Console.WriteLi ne("OnCreated: FullPath=" + e.FullPath + "; Name=" +
    e.Name);
    }
    private static void OnDeleted(objec t source, FileSystemEvent Args e)
    {
    Console.WriteLi ne("OnDeleted: FullPath=" + e.FullPath + "; Name=" +
    e.Name);
    }
    private static void OnRenamed(objec t source, RenamedEventArg s e)
    {
    Console.WriteLi ne("OnRenamed: FullPath=" + e.FullPath + "; Name=" + e.Name
    + "; OldFullPath=" + e.OldFullPath + "; OldName=" + e.OldName);
    }

    Thanks,
    Peter


    Tags: None
    • Moty Michaely
      #2
      Re: FileSystemWatch er

      Hey Peter,

      What operation are you trying to do exactly on the file that fires those
      events?

      If you are trying just to save, LastWrite notify will fire as much times as
      the application saving the file writes and flushes the file.

      - Moty -

      "Peter Kirk" <pk@alpha-solutions.dk> wrote in message
      news:uiNrWFkdFH A.228@TK2MSFTNG P12.phx.gbl...[color=blue]
      > Hi
      >
      > I am trying to use FileSystemWatch er to watch for changes in a directory.
      > The problem I am exepriencing is a double firing of an OnChanged event
      > when a file is opened, edited, and saved. Why is the event fired twice?
      >
      > Here is my code:
      >
      > static void Main(string[] args)
      > {
      > FileSystemWatch er watcher = new FileSystemWatch er();
      > watcher.Path = @"g:\watchme ";
      > watcher.Filter = "";
      > //watcher.NotifyF ilter = NotifyFilters.F ileName |
      > NotifyFilters.L astWrite;
      > watcher.Changed += new FileSystemEvent Handler(OnChang ed);
      > watcher.Created += new FileSystemEvent Handler(OnCreat ed);
      > watcher.Deleted += new FileSystemEvent Handler(OnDelet ed);
      > watcher.Renamed += new RenamedEventHan dler(OnRenamed) ;
      > watcher.Include Subdirectories = false;
      > watcher.EnableR aisingEvents = true;
      > Console.Read();
      > }
      > private static void OnChanged(objec t source, FileSystemEvent Args e)
      > {
      > Console.WriteLi ne("OnChanged: FullPath=" + e.FullPath + "; Name=" +
      > e.Name);
      > }
      > private static void OnCreated(objec t source, FileSystemEvent Args e)
      > {
      > Console.WriteLi ne("OnCreated: FullPath=" + e.FullPath + "; Name=" +
      > e.Name);
      > }
      > private static void OnDeleted(objec t source, FileSystemEvent Args e)
      > {
      > Console.WriteLi ne("OnDeleted: FullPath=" + e.FullPath + "; Name=" +
      > e.Name);
      > }
      > private static void OnRenamed(objec t source, RenamedEventArg s e)
      > {
      > Console.WriteLi ne("OnRenamed: FullPath=" + e.FullPath + "; Name=" +
      > e.Name + "; OldFullPath=" + e.OldFullPath + "; OldName=" + e.OldName);
      > }
      >
      > Thanks,
      > Peter
      >[/color]


        Comment

        • Peter Kirk
          #3
          Re: FileSystemWatch er

          I open the file in notepad (it's a simple text file), add a character, and
          save/close the file.

          Note that in the code I presented I have not set "watcher.Notify Filter" to
          anything. It didn't actually seem to make a difference to the results I saw.

          Peter

          "Moty Michaely" <moty@speedocs. co.il> skrev i en meddelelse
          news:%23LVG%232 kdFHA.2180@TK2M SFTNGP12.phx.gb l...[color=blue]
          > Hey Peter,
          >
          > What operation are you trying to do exactly on the file that fires those
          > events?
          >
          > If you are trying just to save, LastWrite notify will fire as much times
          > as the application saving the file writes and flushes the file.
          >
          > - Moty -
          >
          > "Peter Kirk" <pk@alpha-solutions.dk> wrote in message
          > news:uiNrWFkdFH A.228@TK2MSFTNG P12.phx.gbl...[color=green]
          >> Hi
          >>
          >> I am trying to use FileSystemWatch er to watch for changes in a directory.
          >> The problem I am exepriencing is a double firing of an OnChanged event
          >> when a file is opened, edited, and saved. Why is the event fired twice?
          >>
          >> Here is my code:
          >>
          >> static void Main(string[] args)
          >> {
          >> FileSystemWatch er watcher = new FileSystemWatch er();
          >> watcher.Path = @"g:\watchme ";
          >> watcher.Filter = "";
          >> //watcher.NotifyF ilter = NotifyFilters.F ileName |
          >> NotifyFilters.L astWrite;
          >> watcher.Changed += new FileSystemEvent Handler(OnChang ed);
          >> watcher.Created += new FileSystemEvent Handler(OnCreat ed);
          >> watcher.Deleted += new FileSystemEvent Handler(OnDelet ed);
          >> watcher.Renamed += new RenamedEventHan dler(OnRenamed) ;
          >> watcher.Include Subdirectories = false;
          >> watcher.EnableR aisingEvents = true;
          >> Console.Read();
          >> }
          >> private static void OnChanged(objec t source, FileSystemEvent Args e)
          >> {
          >> Console.WriteLi ne("OnChanged: FullPath=" + e.FullPath + "; Name=" +
          >> e.Name);
          >> }
          >> private static void OnCreated(objec t source, FileSystemEvent Args e)
          >> {
          >> Console.WriteLi ne("OnCreated: FullPath=" + e.FullPath + "; Name=" +
          >> e.Name);
          >> }
          >> private static void OnDeleted(objec t source, FileSystemEvent Args e)
          >> {
          >> Console.WriteLi ne("OnDeleted: FullPath=" + e.FullPath + "; Name=" +
          >> e.Name);
          >> }
          >> private static void OnRenamed(objec t source, RenamedEventArg s e)
          >> {
          >> Console.WriteLi ne("OnRenamed: FullPath=" + e.FullPath + "; Name=" +
          >> e.Name + "; OldFullPath=" + e.OldFullPath + "; OldName=" + e.OldName);
          >> }
          >>
          >> Thanks,
          >> Peter
          >>[/color]
          >
          >[/color]


            Comment

            • Moty Michaely
              #4
              Re: FileSystemWatch er

              I missed that point :)

              Try to set the NotifyFilter to be NotifyFilters.L astWrite to watch for
              changes.

              If you want to watch for file rename events set the filters to be
              NotifyFilters.F ileName. etc.

              I am here for any further comments.
              -Moty-

              "Peter Kirk" <pk@alpha-solutions.dk> wrote in message
              news:%23WLlM%23 kdFHA.3032@TK2M SFTNGP10.phx.gb l...[color=blue]
              >I open the file in notepad (it's a simple text file), add a character, and
              >save/close the file.
              >
              > Note that in the code I presented I have not set "watcher.Notify Filter" to
              > anything. It didn't actually seem to make a difference to the results I
              > saw.
              >
              > Peter
              >
              > "Moty Michaely" <moty@speedocs. co.il> skrev i en meddelelse
              > news:%23LVG%232 kdFHA.2180@TK2M SFTNGP12.phx.gb l...[color=green]
              >> Hey Peter,
              >>
              >> What operation are you trying to do exactly on the file that fires those
              >> events?
              >>
              >> If you are trying just to save, LastWrite notify will fire as much times
              >> as the application saving the file writes and flushes the file.
              >>
              >> - Moty -
              >>
              >> "Peter Kirk" <pk@alpha-solutions.dk> wrote in message
              >> news:uiNrWFkdFH A.228@TK2MSFTNG P12.phx.gbl...[color=darkred]
              >>> Hi
              >>>
              >>> I am trying to use FileSystemWatch er to watch for changes in a
              >>> directory.
              >>> The problem I am exepriencing is a double firing of an OnChanged event
              >>> when a file is opened, edited, and saved. Why is the event fired twice?
              >>>
              >>> Here is my code:
              >>>
              >>> static void Main(string[] args)
              >>> {
              >>> FileSystemWatch er watcher = new FileSystemWatch er();
              >>> watcher.Path = @"g:\watchme ";
              >>> watcher.Filter = "";
              >>> //watcher.NotifyF ilter = NotifyFilters.F ileName |
              >>> NotifyFilters.L astWrite;
              >>> watcher.Changed += new FileSystemEvent Handler(OnChang ed);
              >>> watcher.Created += new FileSystemEvent Handler(OnCreat ed);
              >>> watcher.Deleted += new FileSystemEvent Handler(OnDelet ed);
              >>> watcher.Renamed += new RenamedEventHan dler(OnRenamed) ;
              >>> watcher.Include Subdirectories = false;
              >>> watcher.EnableR aisingEvents = true;
              >>> Console.Read();
              >>> }
              >>> private static void OnChanged(objec t source, FileSystemEvent Args e)
              >>> {
              >>> Console.WriteLi ne("OnChanged: FullPath=" + e.FullPath + "; Name=" +
              >>> e.Name);
              >>> }
              >>> private static void OnCreated(objec t source, FileSystemEvent Args e)
              >>> {
              >>> Console.WriteLi ne("OnCreated: FullPath=" + e.FullPath + "; Name=" +
              >>> e.Name);
              >>> }
              >>> private static void OnDeleted(objec t source, FileSystemEvent Args e)
              >>> {
              >>> Console.WriteLi ne("OnDeleted: FullPath=" + e.FullPath + "; Name=" +
              >>> e.Name);
              >>> }
              >>> private static void OnRenamed(objec t source, RenamedEventArg s e)
              >>> {
              >>> Console.WriteLi ne("OnRenamed: FullPath=" + e.FullPath + "; Name=" +
              >>> e.Name + "; OldFullPath=" + e.OldFullPath + "; OldName=" + e.OldName);
              >>> }
              >>>
              >>> Thanks,
              >>> Peter
              >>>[/color]
              >>
              >>[/color]
              >
              >[/color]


                Comment

                Previous template Next
                Working...