Copy program crashes

  • Thread starter Thread starter TwistedPair
  • Start date Start date
T

TwistedPair

All,
Been trying to get a little program to work, and I think I'm really close,
but I'm afraid I need to be pointed in the right direction. The code below
will watch a directory for files created. If a file is created, it will
copy it off to another directory. This even works if a bunch of files are
created all at once, but after a few copies, the program dies for some
reason. I suspect it's an IO issue, but I wanted to check with the experts
here. Any ideas?

Imports System.ServiceProcess
Imports System.Threading

Public Class Service1
Inherits System.ServiceProcess.ServiceBase
Dim DestDirectory As String
Dim WatchDirectory As String
Dim SourceFilePath As String
Dim SourceFileName As String
Dim MyQueue As New Queue
Dim MyRetValue As New Queue
Private CopyF As New Thread(New System.Threading.ThreadStart(AddressOf
CopyFile))
Private Watchservice As New Thread(New
System.Threading.ThreadStart(AddressOf StartMonitor))

#Region " Component Designer generated code "

Public Sub New()
MyBase.New()

' This call is required by the Component Designer.
InitializeComponent()

' Add any initialization after the InitializeComponent() call

End Sub

'UserService overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub

' The main entry point for the process
<MTAThread()> _
Shared Sub Main()
Dim ServicesToRun() As System.ServiceProcess.ServiceBase

' More than one NT Service may run within the same process. To add
' another service to this process, change the following line to
' create a second service object. For example,
'
' ServicesToRun = New System.ServiceProcess.ServiceBase () {New
Service1, New MySecondUserService}
'
ServicesToRun = New System.ServiceProcess.ServiceBase() {New
Service1}

System.ServiceProcess.ServiceBase.Run(ServicesToRun)
End Sub

'Required by the Component Designer
Private components As System.ComponentModel.IContainer

' NOTE: The following procedure is required by the Component Designer
' It can be modified using the Component Designer.
' Do not modify it using the code editor.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
components = New System.ComponentModel.Container()
Me.ServiceName = "Service1"
End Sub

#End Region

Protected Overrides Sub OnStart(ByVal args() As String)
' Start the thread.
Watchservice.Start()
CopyF.Start()

End Sub

Protected Overrides Sub OnStop()
' Add code here to perform any tear-down necessary to stop your
service.
Watchservice.Abort()
CopyF.Abort()
End Sub
Private Sub StartMonitor()

WatchDirectory =
My.Computer.Registry.GetValue("HKEY_LOCAL_MACHINE\Software\CopyMon",
"Source", Nothing)
DestDirectory =
My.Computer.Registry.GetValue("HKEY_LOCAL_MACHINE\Software\CopyMon",
"Destination", Nothing)

Dim watcher As New System.IO.FileSystemWatcher(WatchDirectory)
'Dim result
'result = Nothing
AddHandler watcher.Created, AddressOf logchange
'Dim SourceFileNameObject As IO.WaitForChangedResult
'Dim SourceFileName As String
'SourceFileName = SourceFileNameObject.Name
'MsgBox(SourceFileName)
watcher.InternalBufferSize.Equals(4000960)
watcher.EnableRaisingEvents = True
'result =
watcher.WaitForChanged(System.IO.WatcherChangeTypes.Created)

End Sub
Private Sub logchange(ByVal source As Object, ByVal e As
System.IO.FileSystemEventArgs)
If e.ChangeType = IO.WatcherChangeTypes.Created Then
SourceFilePath = e.FullPath
SourceFileName = e.Name

'MsgBox(SourceFilePath)
'MsgBox(DestDirectory & "\" & SourceFileName)
'Add files to queue to be picked off in a new sub below


MyQueue.Enqueue(SourceFilePath)
'MyRetValue = queue.Synchronized(MyQueue)
'MsgBox(MyQueue.Count)
End If
End Sub
Private Sub CopyFile()
Do
If MyQueue.Count > 0 Then
'MsgBox("Starting to copy files hopefully")
'get files from the queue, and copy them to destination path
Dim DestPath As String
Dim DQedSrceFilePath As String
DQedSrceFilePath = MyQueue.Dequeue()
DestPath = DestDirectory & "\" & SourceFileName
My.Computer.FileSystem.CopyFile(DQedSrceFilePath, DestPath)
End If
Loop
End Sub
End Class
 
created all at once, but after a few copies, the program dies for some
reason. I suspect it's an IO issue, but I wanted to check with the experts
Click to expand...

What does this mean? Are you getting an exception? If so, what is
it? Without knowing what the exception is, it will be very difficult
to help you.

Chris
 
I know, that's the problem. It just dies. I didn't think to check the
event log until now though, and turns out that the error does show there:

EventType clr20r3, P1 watchdirservice.exe, P2 1.0.0.0, P3 46106804, P4
mscorlib, P5 2.0.0.0, P6 4333ab80, P7 32f8, P8 254, P9
system.io.ioexception, P10 NIL.

So it looks like the problem is IO related after all?
 
I know, that's the problem. It just dies. I didn't think to check the
event log until now though, and turns out that the error does show there:

EventType clr20r3, P1 watchdirservice.exe, P2 1.0.0.0, P3 46106804, P4
mscorlib, P5 2.0.0.0, P6 4333ab80, P7 32f8, P8 254, P9
system.io.ioexception, P10 NIL.

So it looks like the problem is IO related after all?
Click to expand...

Well, that's something, but even that doesn't help very much. A
better way to get the exception is to add a global exception handler
either by putting a try catch around the code in your main method or
by handling the AppDoman.UnhandledException event. Then you can log
the exception to a file and find out exactly what and where it is.

Good luck

Chris
 
Got it, thanks Chris, I'll give that a try. (-:

Chris Dunaway said:
Well, that's something, but even that doesn't help very much. A
better way to get the exception is to add a global exception handler
either by putting a try catch around the code in your main method or
by handling the AppDoman.UnhandledException event. Then you can log
the exception to a file and find out exactly what and where it is.

Good luck

Chris
Click to expand...
 
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