How to filter using filesystem watcher in vb.net

[visweswaran2830]

HI, I Want to filter a file using filesystem watcher. In that, I want to filter more than one type. Let it be, *.exe, *.java....... How can I achieve this

[tlhintoq]

I'm reasonably certain you'll need to set up one FileSystemWatcher for each extension.

There should be no problem pointing them all to the same method handler if you need to. The arguments of the event include the file name, so you can use a Switch construct to take action dependent on the extension from there.

[!NoItAll]

Maybe this is a stupid suggestion, but depending on what you are watching you could set the filter to *.* and then process only the files you want in the function - returning gracefully for any file that does not match your criteria.

This isn't practical if you are watching the entire file system, but if you are looking at a single folder and its subs then this is a reasonable approach.

 
Friend Sub MyTriggeredFunction(ByVal sFile as String)
Static sExtensions() as String = {".txt", ".csv", ".doc"}
 
For each sExt as String in sExtensions
 
    If System.IO.Path.GetExtension(sFile).ToLower.Contains(sExt) then
            'process the file
            Return  
    End if
 
Next sExt
 
 

This seems reasonable to me - but only if you are not watching the entire spectrum of files on a system.