![]() ![]() NotificationFilters Or NotifyFilters.CreationTime If chkCreationTime.Checked Then notificationFilters = _ NotificationFilters Or NotifyFilters.Attributes If chkAttributes.Checked Then notificationFilters = _ VB.NET Private Sub chkMonitor_CheckedChanged(ByVal sender As Object, _īyVal e As EventArgs) Handles chkMonitor.CheckedChangedĭim blnExists As Boolean = Directory.Exists(strFolder)įsWatch.IncludeSubdirectories = chkSubFolders.Checkedĭim notificationFilters As NotifyFilters = New _ MessageBoxButtons.OK, MessageBoxIcon.Error) ![]() MessageBox.Show("Invalid Folder.", "Invalid Folder", NotificationFilters | NotifyFilters.Size įsWatch.NotifyFilter = notificationFilters įsWatch.EnableRaisingEvents = chkMonitor.Checked If (chkSize.Checked) notificationFilters = NotificationFilters | NotifyFilters.LastWrite If (chkLastWrite.Checked) notificationFilters = NotificationFilters | NotifyFilters.FileName If (chkFileName.Checked) notificationFilters = NotificationFilters | NotifyFilters.CreationTime If (chkCreationTime.Checked) notificationFilters = NotificationFilters | NotifyFilters.Attributes If (chkAttributes.Checked) notificationFilters = NotifyFilters notificationFilters = new NotifyFilters() Now, let’s add the final event to control which properties we’d like to track.Ĭ# private void chkMonitor_CheckedChanged(object sender,īool blnExists = Directory.Exists(strFolder) įsWatch.IncludeSubdirectories = chkSubFolders.Checked All they do is to simply log the current date and time along with the old and new names (if renamed), and the specific changed that has occurred. When a file’s properties changes or gets renamed or moved, these events will fire. Let’s add them now.Ĭ# void LogRename(object sender, RenamedEventArgs e) You then create four event handlers for each possible file change. This allows the watcher to keep watching while the form is open. Here, you set the SynchronizingObject to the current form. Set the properties for the FileSystemWatcher.įsWatch.Changed += new FileSystemEventHandler(LogFile) įsWatch.Created += new FileSystemEventHandler(LogFile) įsWatch.Deleted += new FileSystemEventHandler(LogFile) įsWatch.Renamed += new RenamedEventHandler(LogRename) įileSystemEventHandler(AddressOf LogFile) VB.NET Private fsWatch As FileSystemWatcher Name them anything you like, but keep in mind that my names may differ from yours.Īdd the following namespaces to your code. Two textboxes with their Text properties set.Once your form has loaded, design it to resemble Figure 1. Open Visual Studio 2019 and create either a new C# or VB.NET Windows Forms application. These changes could be things like file deletion, file renaming, changing the properties of a file, and so on. To put it better: It watches a folder for any changes. What Is FileSystemWatcher?Īs the name implies, it watches the system for files. Today, I would like to talk about using the FileSystemWatcher in. Returns the number of currently watched paths.Welcome to my article. Returns the number of watched paths, which is also the number of entries added to paths. Retrieves all watched paths and places them in paths. This is especially important if the symlink targets may themselves be watched. Note that on platforms that use symbolic links, you will probably want to have called FileName.DontFollowLink on path. the root directory) as it calls Add for each subdirectory, potentially creating a lot of watches and taking a long time to execute. This method is implemented efficiently on MSW and macOS, but should be used with care on other platforms for directories with lots of children (e.g. This is the same as Add, but also recursively adds every file/directory in the tree rooted at path.Īdditionally a file mask can be specified to include only files matching that particular mask. This is currently implemented only for GTK.īool AddTree ( self, path, events=FSW_EVENT_ALL, filter="" ) ¶ Path ( string) – The name of the path to watch.Įvents ( int) – An optional filter to receive only events of particular types. To watch the symlink itself and not its target you may call FileName.DontFollowLink on path. Note that on platforms that use symbolic links, you should consider the possibility that path is a symlink. Use AddTree to monitor the directory recursively. ![]() The path argument can currently only be a directory and any changes to this directory itself or its immediate children will generate the events. Add ( self, path, events=FSW_EVENT_ALL ) ¶ Methods ¶ _init_ ( self ) ¶ĭefault constructor. The FileSystemWatcher class allows receiving notifications of file
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