Here is the scenario: I'm writing an app that will watch for any changes in a specific directory. This directory will be flooded with thousands of files a minute each with an "almost" unique GUID. The file format is this: GUID.dat where GUID == xxxxxxxxxxxxxxxxxxxxxxxxxxxxx (the internal contents aren't relevant, but it's just text da...
We just started running in to an odd problem with a FileSystemWatcher where the call to Dispose() appears to be hanging. This is code that has been working without any problems for a while but we just upgraded to .NET3.5 SP1 so I'm trying to find out if anyone else has seen this behavior. Here is the code that creates the FileSystemWatch...
I have a .csv file that is frequently updated (about 20 to 30 times per minute). I want to insert the newly added lines to a database as soon as they are written to the file. The FileSystemWatcher class listens to the file system change notifications and can raise an event whenever there is a change in a specified file. The problem is t...
I want to watch a folder tree on a network server for changes. The files all have a specific extension. There are about 200 folders in the tree and about 1200 files with the extension I am watching. I can't write a service to run on the server (off-limits!) so the solution has to be local to the client. Timeliness is not particularly im...
I've written a small test application using the .Net FileSystemWatcher to keep an eye on a directory. When I copy a large-ish (a few Mb) file into that directory I get the following events listed (see screenshot - and ignore the Delete event to begin with). I get a created event (as expected), but then two changed events (about 0.7 se...
I"m looking for something (Win API calls or whatever) to notify me when a file becomes available for editing (i.e. no longer in use). Should I set up a timer to check the files on some interval or is there a good way to set up a watch on the file? ...
I need to setup an application that watches for files being created in a folder (locally or on a network drive) and I was wondering if anyone has any thoughts on whether the FileSystemWatcher or polling on a timer would be the best option. I have used both methods in the past, but not extensively. Have you run into any issues (performanc...
How can I make it work in a network? It works then it stops working without reason (maybe because the network isn't perfect). ...
I am working on a system that processes documents that are dumped into a target directory. I pick up the files by detecting the FileSystemWatcher OnChanged event. As part of a unit test, how should I go about automating this? How should I organize the input files and the output files that get compared to verify that the transformation...
I was asked to find a way to monitor changes (modification, renaming, deletion, moving) of files in specific folders on the company's shared file server (simple windows shared directory). I wrote a simple app in C# that uses FileSystemWatcher to monitor these changes and notify a particular email address of them. What I'd like to know n...
I'm doing a project in a course at my university on distributed systems. I'm planning on creating something similar to Dropbox ( getdropbox.com ), but with some sort of non-centralized peer-to-peer twist to it. For this i need some method of detecting change in a directory structure. How do you think Dropbox do this? Their implementation...
C# FileSystemWatcher does not catch a Perforce revert. It works fine when the same file is modified. This causes a problem because the revert changes the file, but FileSystemWatcher does not get notified. How do you watch for a Perforce revert? Thank you. ...
I have the following sub: Private Sub Watcher_Changed(ByVal sender As System.Object, ByVal e As FileSystemEventArgs) If Path.GetExtension(e.Name) = ".p2p" Then Exit Sub Else Try ' multiple change events can be thrown. Check that file hasn't already been moved. Whi...
Is there a good way to get the process name that created a file in Windows? I have a directory on a Windows 2000 Server C:\WINNT\Temp that is filling up with files named like: 70618199 21834082 They are always 121,201 KB in size. Programatically can I "capture" the program name or service name that is dropping files in this locati...
Hi. I have the following code: Imports System.IO Public Class Blah Public Sub New() InitializeComponent() Dim watcher As New FileSystemWatcher("C:\") watcher.EnableRaisingEvents = True AddHandler watcher.Changed, AddressOf watcher_Changed End Sub Private Sub watcher_Changed(ByVal sender...
I have a program that send a document to a pdf printer driver and that driver prints to a particular directory. After the print I want to attach the pdf to an e-mail (MailMessage) and send it off. Right now, I send the document to the printer (wich spawns a new process) and then call a FileSystemWatcher.WaitForChanged(WaitForChangedRes...
Something intrigues me and I don't find any resource on this. How can FileSystemWatcher know when a file on a computer "A" is created/removed/changed/renamed ? I thought that this worked with polling, (the observer polls the server to check update), but after verifying the network activity with Wireshark I saw that polling was not use...
I need to have a FileSystemWatcher run in an infinite loop to monitor a file for changes, but this file will only change every few days, and maybe only once a week. In the MSDN sample of a FileSystemWatcher, there is a loop while the user doesn't enter q at the console: while(Console.Read()!='q'); I don't want this to be constantly a...
I have made a tiny application that responds to changes to files in a folder. But when I edit the file in Visual Studio 2008, it never detects anything. If I edit the file in Notepad instead, everything works as expected. Surely Visual Studio saves the file at some point, but the watcher does not even trigger when I close the studio. Do...
I am running into an issue with a FileSystemWatcher when multiple files are placed into the watched directory. I want to parse the file as soon as it is placed in the directory. Typically, the first file parses fine, but adding a second file to the directory causes an access issue. Occasionally, the first file doesn't even parse. The...