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Old January 13th, 2005, 01:45 PM
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Default File watcher with Windows service

I'm new with windows service.
I'm trying to create service wich will move the files from one folder(Import) to another(Updated) each time when file had been droped to the Import folder.

so that's what I did:
Public WithEvents watchfolder As FileSystemWatcher
Public upFolder As String = "C:\Test_for_foldermonitoring\Updated"
 Protected Overrides Sub OnStart(ByVal args() As String)
        watchfolder = New System.IO.FileSystemWatcher
        watchfolder.Path = "C:\Test_for_foldermonitoring\Import"
        AddHandler watchfolder.Changed, AddressOf FolderMonitor
        AddHandler watchfolder.Created, AddressOf FolderMonitor
        AddHandler watchfolder.Deleted, AddressOf FolderMonitor

        watchfolder.EnableRaisingEvents = True
        ' Add code here to start your service. This method should set things
        ' in motion so your service can do its work.
    End Sub
Public Sub FolderMonitor(ByVal source As Object, ByVal e As FileSystemEventArgs)
        ' Dim Mypath As String = "C:\Test_for_foldermonitoring\Import"
        ' Dim MynewPath As String = "C:\Test_for_foldermonitoring\Updated"
        If e.ChangeType = WatcherChangeTypes.Changed Then

        End If
            If e.ChangeType = WatcherChangeTypes.Created Then
                File.Move(e.FullPath, upFolder & "\" & e.Name)

            End If
            If e.ChangeType = WatcherChangeTypes.Deleted Then
            End If
        Catch ex As Exception

        End Try

    End Sub

looks pretty easy and works fine when i try it with application or dll,but...(it always a "but" :() when i install it as windows service:
1.It's not working properly with "multifiles drop".
2.It works as soon i started service does one operation and stops.
Any idea anyone?
Thank you in advance

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Old February 1st, 2005, 09:39 AM
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One idea is that the Buffer of the FileSystemWatcher is quite small and easily gets full; therefore only watch for one type of file with each one.

In some cases, I'd recomment using a timer control and checking the contents of the folder on each tick; if you're just waiting for files to arrive in a directory, use the 'create date' property. FileSystemWatcher isn't really very big or robust.

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