Windows Service Timers

[vijayInsync]

Hi all,

I want to upload data at regular intervals, for that I used windows service with timer. Now problem is when I start my service. Its showing System.IO.IOException error. can any one help me, how to solve this

[MrMancunian]

Wow, that's hard without seeing a piece of code or more explaination. All I can think of is that the service is trying to write something to a logfile that cannot be reached???

Steven

[vijayInsync]

Private oTimer As System.Threading.Timer
 
    Protected Overrides Sub OnStart(ByVal args() As String)
        Dim oCallback As New TimerCallback(AddressOf OnTimedEvent)
        oTimer = New System.Threading.Timer(oCallback, Nothing, 0, 10000)
 
    End Sub
 
    Protected Overrides Sub OnStop()
        ' Add code here to perform any tear-down necessary to stop your service.
    End Sub
    Private Sub OnTimedEvent(ByVal state As Object)
 
        Dim fs As FileStream = New FileStream("c:\1\mcWindowsService.txt", FileMode.OpenOrCreate, FileAccess.Write)
        Dim m_streamWriter As StreamWriter = New StreamWriter(fs)
        m_streamWriter.BaseStream.Seek(0, SeekOrigin.End)
        m_streamWriter.WriteLine(" mcWindowsService: Service Started " & Constants.vbLf & " at " & System.DateTime.Now.ToString)
        m_streamWriter.Flush()
 
 
    End Sub
 
 

I am getting message first time, for second tick it is showing error.

[MrMancunian]

Dim fs As FileStream = New FileStream("c:\1\mcWindowsService.txt", FileMode.OpenOrCreate, FileAccess.Write)

Does this path/file exist and do you have permissions to write?

Steven

[vijayInsync]

I told for first time, it writes the file, for next interval it is showing system.io.ioexception.

[MrMancunian]

I don't like your attitude. I'm trying to help you here and if your posts would be in more understandable English, it would make things a lot easier...

Now, did you already try to put this in a normal vb.net app and use breakpoints to debug it?

Steven

[vijayInsync]

Yes, I already tried. I was not getting any solution. so that I posted my question here. When I start my service, for the first time. It is working. output is coming in notepad. in second interval it is showing this debugging message.

If you really helpful, then it is great.......

[vijayInsync]

Sorry boss,

I got the solution. actually the file is being used by another process. i forget to close the file. any way thanks for your cooperation.

[Frinavale]

I was just about to recommend that you check to make sure that you are properly closing the file after you write to it but it looks like you already figured that out.

I'm glad to see that you've solved your problem.

-Frinny