7/22/2023 0 Comments FilewatcherThe default buffer size is 8 KB, but we can set it to any value between 4 KB and 64 KB using InternalBufferSize property. However, it is important to keep in mind when the buffer capacity is exceeded FileSystemWatcher can miss an event. ![]() FileSystemWatcher CaveatsįileSystemWatcher makes it easy to monitor our file system and trigger events accordingly. It is important to note that common file system operations (such as move or copy) might trigger more than one event. _fileSystemWatcher.EnableRaisingEvents = true įileSystemWatcher events are raised to corresponding file system changes inside the path being monitored and in accordance with the filters. Private void HandleCreated(object sender, FileSystemEventArgs e)Ĭonsole.WriteLine($"Create: ") įinally, to enable _fileSystemWatcher to raise events, we have to set EnableRaisingEvents property to true: private void ConfigureEvents() _fileSystemWatcher.Created += HandleCreated We can configure it to trigger an event on the creation of a file or a directory: private void ConfigureEvents() Namely: Created, Deleted, Renamed, Error, and Changed. _fileSystemWatcher.IncludeSubdirectories = true įileSystemWatcher consists of 5 different event types we can use. We can also monitor changes inside subdirectories by using the IncludeSubdirectories property: private void ConfigureFilters() In addition, if we want to monitor file or directory size changes that can happen as a result of file modification, we simply add Size. NET/C# content and get paid? > JOIN US! << Wanna join Code Maze Team, help us produce more awesome. To monitor file or directory security settings (such as read-write permissions, execution, and share permission ) changes we simply add Security into the combination. To monitor read or open operation on a file or directory we can use LastAccess. File or directory attributes are meta-data information that describes a file or a directory behavior (such as file visibility, modifiable, encryption, and more ).ĬreationTime as its name suggests it enables us to monitor the file or a directory creation time. ![]() The Attributes value adds the capability to monitor file or directory attribute changes. The NotifyFilters enumeration values specify changes to monitor in a file or directory. _fileSystemWatcher.NotifyFilter = NotifyFilters.Attributesīy combining NotifyFilters enumeration we can expand the range of changes we monitor. By default, the value of NotifyFilter is a bitwise OR combination of LastWrite, DirectoryName, and FileName, but we can expand that: We can configure NotifyFilter to listen to multiple types of changes using the bitwise OR operator( "|"). NotifyFilter is another property of FileSystemWatcher that enables us to specify and monitor specific changes in the file system. ![]() Now _fileSystemWatcher monitors only text file changes. Let’s configure the type of files we want to monitor: private void ConfigureFilters() The default Filter’s string value is "*.*", which means to monitor all files. Filterįilter is FileSystemWatcher property that enables us to monitor specific files by specifying a file pattern. FileSystemWatcher contains two properties Filter and NotifyFilter to configure filtering. This is where filters are useful because they help us narrow down the type of changes we monitor. ![]() Instead, we want to monitor specific file changes or specific file types. However, we can have a scenario where we don’t want to monitor all kinds of changes in our file system. There is a wide range of file system changes we can monitor using FileSystemWatcher.
0 Comments
Leave a Reply. |