FileSystemWatcher using Asp.Net (C#)

Question

any can tell me how to use FileSystemWatcher Class in a web based application ??? Is it possible ???

ariez · Answer

thanx .. ultimately i have to check the space for comparision but i m not using any button on my page like upload etc ... after logged in folder of a particular user is opened and he can create/delete/edit any file by using mouse and keybords (as normally we do when we work on our PC and the space in our hard drives is reduced). so i want a notifier which can help me detect that user has done something in his folder.

PJ Martins · Answer

You're only other option would be to check how much space is left in each user's folder before they upload a file if a file is too large which will bump it over its 1GB limit display an error message to the user.

ariez · Answer

thanx.... but m using web app (asp.net) i cant use windows app. wat to do ???

PJ Martins · Answer

You can create a service through New Project -> Visual C# -> Windows Service. It will automatically create an OnStart function where you can put your code.

ariez · Answer

ok..but how to create that service ... i dont have any idea ... havnt worked anything like this b4....

PJ Martins · Answer

You might need to create a service which will run on your server to monitor your files since this will run continuously. The page_load is not necessarily the best approach.

ariez · Answer

i have some folders on my FTP server belongs to particular user. Suppose ihave 10GB total space and i assign 1GB to each user i.e i can accomodate 10 users having 1GB each. now users can add/delete/edit any type of file to utilize the storage space. All i need to do is to restrict users not to exceed 1gb space for their file storage. For this i want to use FileSystemWatcher to notify me that a user had created/deleted/edited a file so that i can minimize the space from 1gb incase of creation of a file or add a space incase of deletion. I have this code but i know its not correct b.c the event handlers are in console and i want pure web app. Please help me in completing my this task. THANX using System.IO; using System.Threading; using System.Diagnostics; public partial class _Default : System.Web.UI.Page { DAL conn; string connection; string id = string.Empty; protected void Page_Load(object sender EventArgs e) { connection = Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\project\Desktop\BE prj\dbsan.mdb;Persist Security Info=False; conn = new DAL(connection); ////*** Opening Respective Folder of a User ***//// DirectoryInfo directories = new DirectoryInfo(@C:\Inetpub\ftproot\san\); //DirectoryInfo directories = new DirectoryInfo(@C:\); DirectoryInfo[] folderList = directories.GetDirectories(); if (Request.QueryString[id] != null) id = Request.QueryString[id]; string path = Path.Combine(@C:\Inetpub\ftproot\san\ id); int folder_count = folderList.Length; for (int j = 0; j if (Convert.ToString(folderList[j]) == id) { Process p = new Process(); p.StartInfo.FileName = path; p.Start(); } ClsFileSystemWatcher FSysWatcher = new ClsFileSystemWatcher(); FSysWatcher.FileWatcher(path); } public class ClsFileSystemWatcher { public void FileWatcher(string InputDir) { using (FileSystemWatcher fsw = new FileSystemWatcher()) { fsw.Path = InputDir; fsw.Filter = @*; fsw.IncludeSubdirectories = true; fsw.NotifyFilter = NotifyFilters.FileName | NotifyFilters.Attributes | NotifyFilters.LastAccess | NotifyFilters.LastWrite | NotifyFilters.Security | NotifyFilters.Size | NotifyFilters.CreationTime | NotifyFilters.DirectoryName; fsw.Changed += new FileSystemEventHandler(OnChanged); fsw.Created += new FileSystemEventHandler(OnCreated); fsw.Deleted += new FileSystemEventHandler(OnDeleted); fsw.Renamed += new RenamedEventHandler(OnRenamed); fsw.Error += new ErrorEventHandler(OnError); fsw.EnableRaisingEvents = true; //string strOldFile = InputDir + OldFile.txt; //string strNewFile = InputDir + CreatedFile.txt; //// Making changes in existing file //using (FileStream stream = File.Open(strOldFile FileMode.Append)) //{ // StreamWriter sw = new StreamWriter(stream); // sw.Write(Appending new line in Old File); // sw.Flush(); // sw.Close(); //} //// Writing new file on FileSystem //using (FileStream stream = File.Create(strNewFile)) //{ // StreamWriter sw = new StreamWriter(stream); // sw.Write(Writing First line into the File); // sw.Flush(); // sw.Close(); //} //File.Delete(strOldFile); //File.Delete(strNewFile); // Minimum time given to event handler to track new events raised by the filesystem. Thread.Sleep(1000); } } public static void OnChanged(object source FileSystemEventArgs e) { Console.WriteLine(File  + e.FullPath +  : + e.ChangeType); } public static void OnDeleted(object source FileSystemEventArgs e) { Console.WriteLine(File  + e.FullPath +  : + e.ChangeType); } public static void OnCreated(object source FileSystemEventArgs e) { Console.WriteLine(File  + e.FullPath +  : + e.ChangeType); } public static void OnRenamed(object source RenamedEventArgs e) { Console.WriteLine(File  + e.OldFullPath +  [Changed to]  + e.FullPath); } public static void OnError(object source ErrorEventArgs e) { Console.WriteLine(Error  + e.ToString()); } } }

PJ Martins · Answer

What exactly are you trying to accomplish?

ariez · Answer

Thats fine if by coding server can track all d folder activities done at d client side . my server is FTP. so could u help me in coding on server side ??? i need ur guidance in coding. thanx

PJ Martins · Answer

You can only use the FileSystemWatcher to track files on the server hosting your web application not on the client's machine.