C# - FileSystemWatcher

Example 1

using System;

using System.IO;

namespace TestFileSystemWatcher

{

    class Program

    {

        static void Main(string[] args)

        {

            string path = @"E:\FileWatcher";

            MonitorDirectory(path);

            Console.ReadKey();

        }

        private static void MonitorDirectory(string path)

        {

            FileSystemWatcher fileSystemWatcher = new FileSystemWatcher();

            fileSystemWatcher.Filter = "*.dat";

            fileSystemWatcher.Path = path;

            fileSystemWatcher.Created += FileSystemWatcher_Created;

            fileSystemWatcher.Renamed += FileSystemWatcher_Renamed;

            fileSystemWatcher.Deleted += FileSystemWatcher_Deleted;

            fileSystemWatcher.EnableRaisingEvents = true;

        }

        private static void FileSystemWatcher_Created(object sender, FileSystemEventArgs e)

        {

            Console.WriteLine("File created: {0}", e.Name);

        }

        private static void FileSystemWatcher_Renamed(object sender, FileSystemEventArgs e)

        {

            Console.WriteLine("File renamed: {0}", e.Name);

        }

        private static void FileSystemWatcher_Deleted(object sender, FileSystemEventArgs e)

        {

            Console.WriteLine("File deleted: {0}", e.Name);

        }

    }

}

Example 2

using System;

using System.IO;

using System.Security.Permissions;

namespace TestFileSystemWatcher

{

    public class Watcher

    {

        public static void Main(string[] args)

        {

            Run();

        }

        [PermissionSet(SecurityAction.Demand, Name = "FullTrust")]

        private static void Run()

        {

            string[] args = Environment.GetCommandLineArgs();

            // If a directory is not specified, exit program.

            if (args.Length != 2)

            {

                // Display the proper way to call the program.

                Console.WriteLine("Usage: Watcher.exe (directory)");

                return;

            }

            // Create a new FileSystemWatcher and set its properties.

            using (FileSystemWatcher watcher = new FileSystemWatcher())

            {

                watcher.Path = args[1];

                // Watch for changes in LastAccess and LastWrite times, and

                // the renaming of files or directories.

                watcher.NotifyFilter = NotifyFilters.LastAccess

                                     | NotifyFilters.LastWrite

                                     | NotifyFilters.FileName

                                     | NotifyFilters.DirectoryName;

                // Only watch text files.

                watcher.Filter = "*.dat";

                // Add event handlers.

                watcher.Changed += OnChanged;

                watcher.Created += OnCreated;

                watcher.Deleted += OnDeleted;

                watcher.Renamed += OnRenamed;

                // Begin watching.

                watcher.EnableRaisingEvents = true;

                // Wait for the user to quit the program.

                Console.WriteLine("Press 'q' to quit the sample.");

                while (Console.Read() != 'q') ;

            }

        }

        // Define the event handlers.

        private static void OnChanged(object source, FileSystemEventArgs e)

        {

            // Specify what is done when a file is changed, created, or deleted.

            Console.WriteLine("File: " + e.FullPath + e.ChangeType);

        }

        private static void OnCreated(object source, FileSystemEventArgs e)

        {

            // Specify what is done when a file is changed, created, or deleted.

            Console.WriteLine("File: " + e.FullPath + e.ChangeType);

        }

        private static void OnDeleted(object source, FileSystemEventArgs e)

        {

            // Specify what is done when a file is changed, created, or deleted.

            Console.WriteLine("File: " + e.FullPath + e.ChangeType);

        }

        private static void OnRenamed(object source, RenamedEventArgs e)

        {

            // Specify what is done when a file is renamed.

            Console.WriteLine("File: " + e.OldFullPath +  "renamed to" + e.FullPath);

        }

    }

}