Question

In my network, there are some files whose access is simply blocked.

A user cannot open nor read the file.

When I try to open the file, the only message that I get is “Access Denied”.

 bool isReadOnly = ((File.GetAttributes(Path) & FileAttributes.ReadOnly) ==   FileAttributes.ReadOnly);

I tried other options available under FileAttributes class. Nothing is matched for “Access Denied”.

In short, how do I know whether a file is access-denied to me or not in c#. I am using WPF and visual studio .net 2010

Whenever I try to access it through code, I simply get an exception. When I try to open it manually I get something like “Access Denied.”

try
{
 IEs = from file in Directory.EnumerateFiles(sDirectoryToBeSearched, sValidExtensions, SearchOption.AllDirectories)
                      from str in File.ReadLines(file)
                      where (str.IndexOf(sSearchItem, StringComparison.OrdinalIgnoreCase) >= 0)
                      select file;
}

  catch
 {
      MessageBox ("Exception arised");
 }

Even If used try catch, exception is not handled because of LINQ query. Any solutions ?>

Answer 1

Instead of using LINQ try using recursion, that way if a file or folder access is denied the rest of procedure will continue. Example bellow.

private void SearchDirectory(string folder)
{
    foreach (string file in Directory.GetFiles(folder))
    {
        try 
        {
            // do work;
        }
        catch 
        {
            // access to the file has been denied
        }
    }
    foreach (string subDir in Directory.GetDirectories(folder))
    {
        try 
        {   
             SearchDirectory(subDir);
        }
        catch 
        {
            // access to the folder has been denied
        }

    }
}