How to check if a file is in use without throwing exception using C# e

Arungiri G

6y1kVisual Basic .NET

How to check if a file is in use without throwing exception using C# example, No links please

5 Replies

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Mageshwaran R5y ago
Hi Arungiri,

please refer this link,it may help you,

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

+1
Arungiri G6y ago
Thank you all
+1
Rajanikant Hawaldar6y ago
Updated NOTE on this solution: Checking with FileAccess.ReadWrite will fail for Read-Only files so the solution has been modified to check with FileAccess.Read. While this solution works because trying
to check with FileAccess.Read will fail if the file has a Write or Read lock on it, however, this solution will not work if the file doesn't have a Write or Read lock on it, i.e. it has been opened (for reading or writing)
with FileShare.Read or FileShare.Write access.
protected virtual bool IsFileLocked(FileInfo file)
{
     try
{
  using (FileStream stream = file.Open(FileMode.Open, FileAccess.Read, FileShare.None))
{
stream.Close();
}
}
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;
}
//file is not locked
return false;
}
+1
Sachin Singh6y ago
protected virtual bool IsFileInUse(FileInfo file)
{
    FileStream stream = null;

    try
    {
        stream = file.Open(FileMode.Open, FileAccess.Read, FileShare.None);
    }
    catch (IOException)
    {

        return true;
    }
    finally
    {
        if (stream != null)
            stream.Close();
    }


    return false;
}
+1
Jignesh Kumar6y ago
Hi Arungiri,

Please check this link which will help you,
https://stackoverflow.com/questions/876473/is-there-a-way-to-check-if-a-file-is-in-use
+1