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FileInfo로 확인할수 없는 해당 파일을 이미 오픈되었는지 확인하는 소스입니다.

구글링 끝에 찾아 내었습니다.

참고하시기 바랍니다.

출처 : http://stackoverflow.com/questions/876473/is-there-a-way-to-check-if-a-file-is-in-use

protected virtual bool IsFileLocked(FileInfo file)
{
FileStream stream = null;
try
{
stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);
}
catch (IOException)
{
//the file is unavailable because it is:
//still being written to
//or being processed by another thread
//or does not exist (has already been processed)
return true;
}
finally
{
if (stream != null)
stream.Close();
}
//file is not locked
return false;
}

 1: protected virtual bool IsFileLocked(FileInfo file)

 2: {

 3:  FileStream stream = null;

 4:  try

 5:  {

 6:  stream = file.Open(FileMode.Open, FileAccess.ReadWrite, FileShare.None);

 7:  }

 8:  catch (IOException)

 9:  {

 10:  //the file is unavailable because it is:

 11:  //still being written to

 12:  //or being processed by another thread

 13:  //or does not exist (has already been processed)

 14:  return true;

 15:  }

 16:  finally

 17:  {

 18:  if (stream != null)

 19:  stream.Close();

 20:  }

 21:  //file is not locked

 22:  return false;

 23: }