Is there a safe way of detecting File access permissions

Question

Below is the part code I currently use to write to a file,

Try
    Using sWriter As New IO.StreamWriter("C:\Tmp.txt", False)
        sWriter.Write(m_Buffer.ToString) : sWriter.Flush()
    End Using
        Return True
Catch ex As IOException

End Try

but some time this results in error

Access to the path 'C:\Tmp.txt' is denied

My question is, Is there a safe way of detecting File access permissions, without handling exceptions, I mean if I can some how check before opening a file for any filehandle opened for it.

I think I have made my point. Thanks in Advance

You can use FileInfo class to check on the permissions of the file. But again, if some other process is using the file, that also could cost you an exception. — Zenwalker, Jun 09 '11 at 11:01

score 0 · Answer 1 · answered Jun 09 '11 at 11:06

0

Given that it's possible for a file to become locked after a hypothetical call to an IsFileLocked() method, you are always going to want exception handling around your subsequent I/O operation.

Such code would like like what you have now.

answered Jun 09 '11 at 11:06

Alex K.

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Yep! Exception Handling would remain there I was just looking for the way to get out of procedure if the file is being used. – Rajeev Jun 09 '11 at 11:26

score 0 · Accepted Answer · edited May 23 '17 at 10:34

0

There have been other similar questions asked in StackoverFlow. check this before you ask!

How do you check for permissions to write to a directory or file?
how can you easily check if access is denied for a file in .NET?

The first link can help you directly.

edited May 23 '17 at 10:34

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answered Jun 09 '11 at 11:07

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Is there a safe way of detecting File access permissions

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