I am creating an application that will watch for file changes in a directory although while files with an extension are detected, folders are not.

using System;
using System.IO;
using System.Diagnostics;

namespace fileSystemWatcherTest
{
    class myClass
    {
        static void Main()
        {
            using var watcher = new FileSystemWatcher(@"C:\Users\Username\Desktop\Watching folder");

            watcher.NotifyFilter = NotifyFilters.Attributes
                | NotifyFilters.CreationTime
                | NotifyFilters.FileName
                | NotifyFilters.LastWrite;

            watcher.Changed  = onChanged;
            watcher.Created  = onCreated;
            watcher.Error  = one rror;

            watcher.Filter = "";
            watcher.IncludeSubdirectories = true;
            watcher.EnableRaisingEvents = true;

            Console.WriteLine("Press enter to exit.");
            Console.ReadLine();
        }

        private static void onChanged(object sender, FileSystemEventArgs e)
        {
            if (e.ChangeType != WatcherChangeTypes.Changed)
            {
                return;
            }

            Console.WriteLine($"Changed: {e.FullPath}");

            string fileExtension = Path.GetExtension(e.FullPath);

            if (fileExtension != string.Empty)
            {
                Console.WriteLine(fileExtension);
            }
        }

        private static void onCreated(object sender, FileSystemEventArgs e)
        {
            Console.WriteLine($"Created: {e.FullPath}");
        }

        private static void one rror(object sender, ErrorEventArgs e)
        {
            printException(e.GetException());
        }

        private static void printException(Exception ex)
        {
            if (ex != null)
            {
                Console.WriteLine("ERROR");
                Console.WriteLine($"Message: {ex.Message}");
                Console.WriteLine($"StackTrace:");
                Console.WriteLine(ex.StackTrace);
                Console.WriteLine("");
                printException(ex.InnerException);
            }
        }
    }
}

According to the documentation and the intellisense directories should be detected.

I believe that the problem is with the Filter property but i can't get it to work so i would appreciate some help.

CodePudding user response：

To detect directories as well, you need to add NotifyFilters.DirectoryName to watcher.NotifyFilter:

watcher.NotifyFilter = NotifyFilters.Attributes
    | NotifyFilters.CreationTime
    | NotifyFilters.DirectoryName
    | NotifyFilters.FileName
    | NotifyFilters.LastWrite;

Checkout the documentation of NotifyFilters.