The process cannot access the file '2016-02-26-13.txt' because it is being used by another process." in error log report

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"The process cannot access the file '2016-02-26-13.txt' because it is being used by another process."Error log not working."The process cannot access the file '2016-02-26-13.txt' because it is being used by another process."Error log not working

C#

public static void ErrLog(string filename, string methodname, string errorMsg)
{
  string path = AppDomain.CurrentDomain.BaseDirectory + @"ErrLogReport\";
  string dir = Path.GetDirectoryName(path);

  if (!Directory.Exists(dir))
  {
      Directory.CreateDirectory(dir);
  }

  string strFileName = string.Format(@"{0}\{1}.txt", path, DateTime.Now.ToString("ddMMMyyyy_HH"));
  StreamWriter sw = new StreamWriter(strFileName, true);

  sw.WriteLine(string.Format("{0}", DateTime.Now.ToString("[hh:mm:ss:fff]")));

  if (filename.Length > 0)
      sw.Write("File Name: " + filename);

  if (methodname.Length > 0)
    sw.WriteLine(" Method Name: " + methodname);

  sw.WriteLine("ErrorMsg: " + errorMsg);
  sw.WriteLine("---");

  sw.Flush();
  sw.Close();
}

What I have tried:

done coding.But i am using multi threading operation.It calls simtaneously in error log method.

Posted 28-Feb-16 19:15pm

SATHISH kumar

Updated 28-Feb-16 22:08pm

StM0n

v2

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Comments

StM0n 29-Feb-16 1:31am

As you already mentioned, you're writing simultaneously... lock the writing... are you able to use a logging framework?

SATHISH kumar 29-Feb-16 1:35am

No,not using

StM0n 29-Feb-16 1:41am

You're not able to use or you are not using one? If you're able to use one, do that; they're plenty to choose one :)

SATHISH kumar 29-Feb-16 1:36am

when i lock writing ,other when writing or not writing

StM0n 29-Feb-16 1:40am

Maybe you should look up "lock csharp" and give it a reading.

2 solutions

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Mehdi Gholam · Answer 1 · 2016-02-28T19:39:00

Solution 1

Multi threading is a difficult beast, don't write your own code unless you are very experienced, use one of these instead :
Mini Drop-in Replacement for log4net[^]
Apache log4net – Apache log4net: Home[^]

Posted 28-Feb-16 19:39pm

Mehdi Gholam

Jochen Arndt · Answer 2 · 2016-02-28T22:07:00

Solution 2

You must lock the code portions that access the file. See the lock Statement (C# Reference)[^].

Because your logging function is static, you must create a static lock object:

C#

static object lockErrLog = new object();

public static void ErrLog(string filename, string methodname, string errorMsg)
{
    // Code that does not require locking

    // Lock file access
    lock (lockErrLog)
    {
        StreamWriter sw = new StreamWriter(strFileName, true);
        // Write to stream here
        sw.Close();
    }
}

Posted 28-Feb-16 22:07pm

Jochen Arndt

Comments

SATHISH kumar 29-Feb-16 4:15am

when i writing using with Lock object,others when writing.

Jochen Arndt 29-Feb-16 4:18am

???

From the above link:
"The lock keyword ensures that one thread does not enter a critical section of code while another thread is in the critical section. If another thread tries to enter a locked code, it will wait, block, until the object is released."

The process cannot access the file '2016-02-26-13.txt' because it is being used by another process." in error log report

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The process cannot access the file '2016-02-26-13.txt' because it is being used by another process." in error log report

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