Question

Here is my single-thread code :

OnStart 
{
 FileSystemWatcher Watcher = new FileSystemWatcher();
 Watcher.NotifyFilter = NotifyFilters.FileName | NotifyFilters.LastWrite |NotifyFilters.CreationTime | NotifyFilters.DirectoryName;
 FileActionHandler ActionHandler = new FileActionHandler();
 Watcher.Created += new FileSystemEventHandler(ActionHandler.onCreate);
}

onCreate(object source,FileSystemEventArgs e)
{
 try
 {
 FileInfo file = new FileInfo (e.FullPath);
 String output = <FileName>File.Name + <FullPath>File.FullName + <FileSize>File.Length +  <CreationTime>File.CreationTime + <LastAccess>File.LastAccess + <LastWriteTime>File.LastWriteTime;
 LogToTextFile(output);
 }
 catch
 {
 LogToTextFile(ex.GetBaseException().Message);
 }
}

private void LogToTextFile(String s)
{
FileStream fileStream = new FileStream(@"c:\Log.txt", FileMode.Append, FileAccess.Write);
StreamWriter sw = new StreamWriter(fileStream);
sw.WriteLine(s);
sw.Flush();
sw.Close();
fileStream.Close();
}

Question: I want to incorporate Multi-Threading for Event-Handling in C# ? Simply,what I mean is to start a new thread to handle for each of the events raised.
How do I go about doing that ? Please help me on this pressing issue…

Answer 1

If you’re not using .NET 4, as Pierre-Luc mentioned, you can simply swap out his code for this:

new Thread(new ThreadStart(delegate{
    onCreate(source, e);
})).Start();

Or, if you would rather use a ThreadPool (which I would recommend in this case)…

ThreadPool.QueueUserWorkItem(delegate{ onCreate(source, e); });