![]() If a file is changed, created, or deleted, the path to the file prints to the console. The component is set to watch for changes in LastWrite and LastAccess time, the creation, deletion, or renaming of text files in the directory. The following example creates a FileSystemWatcher to watch the directory specified at run time. To avoid a buffer overflow, use the NotifyFilter and IncludeSubdirectories properties so you can filter out unwanted change notifications. Increasing the size of the buffer with the InternalBufferSize property is expensive, as it comes from non-paged memory that cannot be swapped out to disk, so keep the buffer as small yet large enough to not miss any file change events. This causes the component to lose track of changes in the directory, and it will only provide blanket notification. If there are many changes in a short time, the buffer can overflow. The Windows operating system notifies your component of file changes in a buffer created by the FileSystemWatcher. TimeOut is the time (in milliseconds) to wait before timing out. You can access information such as Name, OldName, and TimedOut on this object to find out more about the change. ![]() This class contain specific information on the type of change that occurred in the directory. WaitForChanged is a synchronous method that returns an object of type WaitForChangedResult. The types of changes include: changes to size, attributes, security settings, last write, and last access time. The creation, deletion, change, or renaming of a file or folder. The possible values are as follows: Member Name You specify the type of change to watch for by setting the value of a WatcherChangeType enumeration. For example, to watch for renaming of text files, set the Filter property to "*.txt" and call the WaitForChanged method with a Renamed specified for its parameter. You can watch for renaming, deletion, or creation of files or directories. For more information on the type of changes you can watch, see NotifyFilters. This is done by setting the NotifyFilter property to one of the NotifyFilters values. For example, you can watch for changes in Attributes, the LastWrite date and time, or the Size of files or directories. There are several types of changes you can watch for in a directory or file. For example, to watch for changes in text files, set the Filter property to "*.txt". You can also watch for changes in a certain type of file. For example, to watch for changes in the file MyDoc.txt, set the Filter property to "MyDoc.txt". To watch a specific file, set the Filter property to the file name. To watch for changes in all files, set the Filter property to an empty string ("") or use wildcards ("*.*"). You can create a component to watch files on a local computer, a network drive, or a remote computer. You can watch for changes in files and subdirectories of the specified directory. Use FileSystemWatcher to watch for changes in a specified directory. It is one of the members of System.IO namespace. ![]() ![]() This makes it possible to easily detect when certain files or directories are created, modified or deleted. Download EaseFilter File Monitor Filter Driver SDK Setup Fileĭownload EaseFilter File Monitor Filter Driver SDK Zip File Understand EaseFilter Filter Driver SDK Programming Monitoring File Change using FileSystemWatcher in C#įileSystemWatcher is a very powerful component, which allows us to connect to the directories and watch for specific changes within them, such as creation of new files, addition of subdirectories and renaming of files or subdirectories. ![]()
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