Hello KoenT,

I agree with you that, Directory.GetFiles will be much more useful if it
has a callback to report its search progress, and if it has an overload
that specifies whether to ignore UnauthorizedAccessExceptions and just keep
on processing folders to which it does have access. As a long-term
resolution, I have submitted the suggestions to the .NET team. The
designers have confirmed they are very valuable and are tracking them in
their primary planning and scheduling database for consideration in a
future release. As a short-term workaround, we can consider the solution
mentioned by Peter, and below is an example code list I write for your
reference:

   public class DirectoryHelper
   {
       public delegate void DirectoryEnumeratedHandler(string path);

       public event DirectoryEnumeratedHandler DirectoryEnumerated;

       public string[] GetAllAccessibleFiles(string path, string
searchPattern)
       {
           List<string> files = new List<string>();
           GetAccessibleFilesRecursively(path, searchPattern, files);
           return files.ToArray();
       }

       private void GetAccessibleFilesRecursively(string path, string
searchPattern, List<string> files)
       {
           try
           {
               // add the files directly under the path to the result
collection
               files.AddRange(Directory.GetFiles(path, searchPattern));

               if (DirectoryEnumerated != null)
                   DirectoryEnumerated(path);

               string[] subDirectories = Directory.GetDirectories(path);
               foreach (string subDir in subDirectories)
               {
                   GetAccessibleFilesRecursively(subDir, searchPattern,
files);
               }
           }
           catch { }
       }
   }

The class exposes an event "DirectoryEnumerated" to report the progress,
and it won't stop and throw UnauthorizedAccessExceptions when a sub
directory cannot be accessed.

To use the class:
DirectoryHelper dirHelper = new DirectoryHelper();
string[] files = dirHelper.GetAllAccessibleFiles("d:\\tests\\", "*");

If you have any other concerns or questions, feel free to let me know.

Regards,
Jialiang Ge (jialge@online.microsoft.com, remove 'online.')
Microsoft Online Community Support

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