![]() use removeFileEventsListener(FileEventsListener) instead RemoveListener( FileEventsListener listener)ĭeprecated. Removes file events listener from this watcher. RemoveFileEventsListener( FileEventsListener listener) Releases all native resources which are associated with a watcher instance. Reads next portion of file system events. Returns the currently watching directory. Operating system and file system type of the specified folder. use addWatcherListener(WatcherEventListener) insteadĪddWatcherListener( WatcherEventListener listener)įactory method that creates a most efficient file system watcher depending on a current use addFileEventsListener() insteadĪddListener( WatcherEventListener listener)ĭeprecated. ![]() Verifies if the specified event should be filtered out or not using the associated FileEventFilter.ĪddFileEventsListener( FileEventsListener listener)Īdds file events listener to this watcher.ĪddListener( FileEventsListener listener)ĭeprecated. Provides the functionality for monitoring file events in a specified folder.Ĭreates a new watcher for the specified folder. Public abstract class FileWatcher extends SUMMARY: NESTED | FIELD | CONSTR | METHODĬom. Direct Known Subclasses: FATWatcher, FSEventWatcher, INotifyWatcher, KEventWatcher, NTFSWatcher FileWatcher (JxFileWatcher 1.4 Documentation) NET since the release of the first beta and is co-author of Learn Microsoft Visual Basic.Net In a Weekend. Jay Miller is a Software Engineer with Electronic Tracking Systems, a company dedicated to robbery prevention, apprehension, and recovery based in Carrollton, Texas. You may want to further explore the Filter and NotifyFilter properties as well as the various events available to make best use of the FileSystemWatcher class. This provides a simple way to monitor the files used by your application. Here is an example usage of the MessageFileWatcher class: MessageFileWatcher WarningMessage = I’ve included the OnChanged event handler for completeness, but the code in this method will depend upon your application. I then hook one of my methods into the Changed event of the FileSystem Watcher and enable it to raise events. In this case, I want to be notified every time the file is written, so I am using LastWrite. Next, the NotifyFilter property is set to indicate the type of change which is of interest. A new FileSystemWatcher variable is created and the Path and Filter properties are set to the parameters passed into the constructor. The constructor for my MessageFileWatcher class takes the path to the directory where the file is stored as well as the specific file name as parameters. Do something here based on the change to the file Private void OnChanged(object source, FileSystemEventArgs e) Watcher.Changed += new FileSystemEventHandler(OnChanged) Watcher.NotifyFilter = NotifyFilters.LastWrite Public MessageFileWatcher(string Path, string FileName)įileSystemWatcher Watcher = new FileSystemWatcher() Here is what the class looks like: public class MessageFileWatcher When one of these text files changes, the application can detect the change and cache the new contents of the file. I use this class to watch for changes in text files that contain the body of an email message that is sent when the status of your system changes. For this example, I’ll show you a class that watches for changes in the LastWrite property of a specific file. It also can be configured only to notify your application of certain types of changes. It can be used to monitor directories, individual files, or groups of files. Using the FileSystemWatcher class provides you with a very simple but flexible way to monitor the file system. NET Tip: Receive Notification When a File is Updated
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