File protection between webservice calls

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nano2k - 22 Jan 2007 14:28 GMT

Hi
My C# webservice uses a file to store some (short) information between
calls.
One method creates/updates the content of a file, another reads it.
What is the best method to avoid issues like "file is already opened by
another process", etc between calls?
Using Monitor.Enter(...) and Monitor.Exit(...) (or lock statement in
C#) will gracefully solve my problem in every situation?

Thanks.
Adi.

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Mariano Omar Rodriguez - 22 Jan 2007 22:26 GMT

You'll need execute the Dispose method instead of close.

> Hi
> My C# webservice uses a file to store some (short) information between
[quoted text clipped - 7 lines]
> Thanks.
> Adi.

Reply to this Message

nano2k - 23 Jan 2007 07:16 GMT

Hi

Thanks for your response.
Below is a code snipet from one of my webservice methods:

string fName    = Path.Combine(path, "schemaDate.dat");
lock(m_syncToken) {
    StreamWriter sw    = File.CreateText(fName);
    try{
        sw.Write(m_schemaDate.ToString(CultureInfo.InvariantCulture));
    }
    finally{
        sw.Close();
    }
}

m_syncToken is defined as:
private static object m_syncToken;

My question is: is this pattern powerful enough to ensure exclusive
acces to only one request? I'm using .NET Framework 1.1 and IIS 5.1.

Mariano Omar Rodriguez a scris:

> You'll need execute the Dispose method instead of close.
>
[quoted text clipped - 9 lines]
> > Thanks.
> > Adi.

Reply to this Message

Mariano Omar Rodriguez - 24 Jan 2007 00:00 GMT

This code only assures single access to the file if only a worker process is
running at the time.
Ahother thing is that you need call Dispose instead of Close.

> Hi
>
[quoted text clipped - 32 lines]
>> > Thanks.
>> > Adi.

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nano2k - 24 Jan 2007 06:47 GMT

Dispose method of what object?

Mariano Omar Rodriguez a scris:

> This code only assures single access to the file if only a worker process is
> running at the time.
[quoted text clipped - 36 lines]
> >> > Thanks.
> >> > Adi.

Reply to this Message

File protection between webservice calls

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