Archive of: FileSystem

1. Using .NET to Monitor a Directory for Changes posted February 8, 2010
   

   .NET’s FileSystemWatcher class can soothe the paranoid control freak in all of us by monitoring a specified folder for different types of file system changes.

   The Code

   using System;
   using System.Text;
   using System.IO;
   
   namespace FolderWatcher {
     class Watcher {
       static void Main(string[] args) {
         FileSystemWatcher watcher = new FileSystemWatcher(@"D:\test");
         watcher.IncludeSubdirectories = true;
         watcher.Filter = "";
         watcher.Renamed += new RenamedEventHandler(renamed);
         watcher.Deleted += new FileSystemEventHandler(changed);
         watcher.Changed += new FileSystemEventHandler(changed);
         watcher.Created += new FileSystemEventHandler(changed);
         watcher.EnableRaisingEvents = true;
   
         Console.ReadKey();
      }
   
       private static void renamed(object sender, RenamedEventArgs e) {
         Console.WriteLine(DateTime.Now + ": " +
             e.ChangeType + " " + e.FullPath);
       }
   
       private static void changed(object sender, FileSystemEventArgs e) {
         Console.WriteLine(DateTime.Now + ": " +
             e.ChangeType + " " + e.FullPath);
       }
     }
   }
   

   Explanation

   FileSystemWatcher watcher = new FileSystemWatcher(@"D:\test");
   

   The core of is application is .NET’s FileSystemWatcher class which monitors directories for file system changes.

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

   Tells the FileSystemWatcher object to include changes in subdirectories and raise events on every type of file.

   An empty string for the filter will match every file and folder in the watched directory. File types and names can also be added to the filter to… Read the rest

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