RE: File System Monitor Question
From: Joel Hendrix [MSFT] (noparity_at_online.microsoft.com)
Date: 05/10/04
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Date: Mon, 10 May 2004 21:42:54 GMT
There are two ways I can think of to solve this problem. One way would be
to create another FileSystemWatcher for the other directory. The other
option would be to have you FileSystemWatcher monitor a directory higher up
in the hierarchy and then start the appropriate process based on where the
file was created. Something like this (pseudocode):
Monitor c:\root1
if new file created in c:\root1\subdir1 do process A
else if new file created in c:\root1\subdir2 do process B
else ...
Of course, this watches all files created in c:\root1, so depending on how
much activity that directory gets this might be more expensive than
watching the two specific directories. This also assumes that the
directories to watch are located in a common directory. One could watch
the root drive, but I think that would be way too expensive, but I don't
have any data to back that up.
hth
-Joel
--------------------
>Reply-To: "Jack David" <JDavid@NordisDirect.Com>
>From: "Jack David" <JDavid@NordisDirect.com>
>Subject: File System Monitor Question
>Date: Mon, 10 May 2004 11:25:29 -0400
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>
>Using the code below I am able to monitor a single directory for a new file
>and then kick-off a process to deal with the file. The question is??? How
>would I modify this code to be able to monitor a couple of different
>directories and based upon the directory where the new file is created
>kick-off a process
>
>Example:
>
>File A in Directory B starts process C
>
>File F in Directory X starts process Y
>
>Thanks
>
>
>
>
>
>
>
>
>
>using System;
>
>using System.IO;
>
>using FileProcessor;
>
>
>
>namespace DirectoryMonitorConsole
>
>{
>
>/// <summary>
>
>/// Summary description for Class1.
>
>/// </summary>
>
>public class DirectoryMonitorConsole
>
>{
>
>private File_Processor objFileProcessor;
>
>/// <summary>
>
>/// Used as a test application for the Directory Monitor Service
>
>/// </summary>
>
>[STAThread]
>
>public static void Main()
>
>{
>
>// Define the directory to monitor
>
>FileSystemWatcher watcher = new FileSystemWatcher();
>
>watcher.Path = @"c:\FTPIN\PSIFL";
>
>//watcher.Path = @"d:\FTPIN\PSIFL";
>
>// Define what to monitor
>
>watcher.NotifyFilter = NotifyFilters.DirectoryName |
NotifyFilters.FileName;
>
>// Define file filter
>
>watcher.Filter = "*.*";// look for any new file
>
>// Define event handlers
>
>watcher.Created += new FileSystemEventHandler(OnChanged);
>
>// Begin watching the directory
>
>watcher.EnableRaisingEvents = true;
>
>// Wait for the user to quit the program
>
>Console.WriteLine(@"Press q to quit this program");
>
>while(Console.Read()!='q');
>
>}
>
>
>/// <summary>
>
>/// Event handler for a new file put into the directory that is being
>monitored
>
>/// </summary>
>
>/// <param name="source"></param>
>
>/// <param name="e"></param>
>
>private static void OnChanged(object source, FileSystemEventArgs e)
>
>{
>
>Console.WriteLine("File: {0} {1}!", e.FullPath, e.ChangeType);
>
>// Get the name of the new file
>
>// Make a reference to a directory
>
>DirectoryInfo di = new DirectoryInfo(@"c:\FTPIN\PSIFL");
>
>//DirectoryInfo di = new DirectoryInfo(@"c:\FTPIN\PSIFL");
>
>// Get a reference for each file in the directory
>
>FileInfo[] fi = di.GetFiles();
>
>string strFileName = fi[0].ToString();
>
>fi = null;
>
>di = null;
>
>File_Processor objFileProcessor = new
>FileProcessor.File_Processor(strFileName);
>
>objFileProcessor = null;
>
>}
>
>}
>
>}
>
>
>
--------------------------------------------------------------------
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