How can I check if the excel file on which I am working (manipulating its data, deleting it or overwriting it) is in use by another program? And how to release it from the same?
Please guide me using C#.
Attempt to open in with flags "for writing". If it fails, the file is "taken" by some other process.
FileStream fileStream = null;
try
{
fileStream =
new FileStream(@"c:\file.txt", FileMode.Open, FileAccess.Write);
}
catch (UnauthorizedAccessException e)
{
// The access requested is not permitted by the operating system
// for the specified path, such as when access is Write or ReadWrite
// and the file or directory is set for read-only access.
}
finally
{
if (fileStream != null)
fileStream.Close ();
}
P.S. Just found a very similar question with basically the same answer:
C#: Is there a way to check if a file is in use?
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