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

Question

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

Sachin Singh · Answer

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 ; }

Mageshwaran R · Answer

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

Arungiri G · Answer

Thank you all

Rajanikant Hawaldar · Answer

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 ; }

Jignesh Kumar · Answer

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