"c# FileSystemWatcher" Code Answer's

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how to use file watcher in c#

By Andy79Andy79 on Nov 13, 2020
private void watch()
{
  FileSystemWatcher watcher = new FileSystemWatcher();
  watcher.Path = path;
  watcher.NotifyFilter = NotifyFilters.LastWrite;
  watcher.Filter = "*.*";
  watcher.Changed += new FileSystemEventHandler(OnChanged);
  watcher.EnableRaisingEvents = true;
}

Source: stackoverflow.com

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c# FileSystemWatcher

By Lucky LobsterLucky Lobster on May 11, 2021
  public class Monitor : IDisposable
  {
     private List<string> filePaths;
     private ReaderWriterLockSlim rwlock;
     private Timer processTimer;
     private string watchedPath;
     private FileSystemWatcher watcher;

     public Monitor(string watchedPath)
     {
        filePaths = new List<string>();

        rwlock = new ReaderWriterLockSlim();

        this.watchedPath = watchedPath;
        InitFileSystemWatcher();
     }

     private void InitFileSystemWatcher()
     {
        watcher = new FileSystemWatcher();
        watcher.Filter = "*.*";
        watcher.Created += Watcher_FileCreated;
        watcher.Error += Watcher_Error;
        watcher.Path = watchedPath;
        watcher.IncludeSubdirectories = true;
        watcher.EnableRaisingEvents = true;
     }

     private void Watcher_Error(object sender, ErrorEventArgs e)
     {
        // Watcher crashed. Re-init.
        InitFileSystemWatcher();
     }

     private void Watcher_FileCreated(object sender, FileSystemEventArgs e)
     {
        try
        {
           rwlock.EnterWriteLock();
           filePaths.Add(e.FullPath);

           if (processTimer == null)
           {
              // First file, start timer.
              processTimer = new Timer(2000);
              processTimer.Elapsed += ProcessQueue;
              processTimer.Start();
           }
           else
           {
              // Subsequent file, reset timer.
              processTimer.Stop();
              processTimer.Start();
           }

        }
        finally
        {
           rwlock.ExitWriteLock();
        }
     }

     private void ProcessQueue(object sender, ElapsedEventArgs args)
     {
        try
        {
           Console.WriteLine("Processing queue, " + filePaths.Count + " files created:");
           rwlock.EnterReadLock();
           foreach (string filePath in filePaths)
           {
              Console.WriteLine(filePath);
           }
           filePaths.Clear();
        }
        finally
        {
           if (processTimer != null)
           {
              processTimer.Stop();
              processTimer.Dispose();
              processTimer = null;
           }
           rwlock.ExitReadLock();
        }
     }

     protected virtual void Dispose(bool disposing)
     {
        if (disposing)
        {
           if (rwlock != null)
           {
              rwlock.Dispose();
              rwlock = null;
           }
           if (watcher != null)
           {
              watcher.EnableRaisingEvents = false;
              watcher.Dispose();
              watcher = null;
           }
        }
     }

     public void Dispose()
     {
        Dispose(true);
        GC.SuppressFinalize(this);
     }

  }     

Source: stackoverflow.com

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c# file watcher specific file

By VKangryVKangry on Nov 20, 2020
watcher.Path = Path.GetDirectoryName(filePath1); 
watcher.Filter = Path.GetFileName(filePath1);

Source: stackoverflow.com

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