TheSwamp

Code Red => .NET => Topic started by: Jeff H on November 16, 2011, 08:37:23 AM

Title: Directory Access
Post by: Jeff H on November 16, 2011, 08:37:23 AM

Does anyone know a better a way or less klunky than DirectorySecurity to check if you have access to a directory?
 
Here

Code: [Select]

     foreach (string directory in Directory.GetDirectories(directoryPath))
            {               
                try
                {
                    Directory.GetDirectories(directory);
                   ///////Do your thing;
            ///////Like add directory as a node to a TreeView if GetDirectories does not
            ///////throw a exception

                }
                catch (UnauthorizedAccessException uex)
                {
                }
            }

I guess it is because it can change from the time you checked.

Title: Re: Directory Access
Post by: huiz on November 16, 2011, 09:57:04 AM

I found some VB code:

Code: [Select]

Public Function CanWriteTo(ByVal DirectoryPath As String) As Boolean
 Dim dirInfo As System.IO.DirectoryInfo = FileIO.FileSystem.GetDirectoryInfo(DirectoryPath)
 Dim currentUser As System.Security.Principal.WindowsIdentity = System.Security.Principal.WindowsIdentity.GetCurrent()
 Dim currentPrinciple As System.Security.Principal.WindowsPrincipal = System.Threading.Thread.CurrentPrincipal
 Dim acl As System.Security.AccessControl.AuthorizationRuleCollection = dirInfo.GetAccessControl().GetAccessRules(True, True, GetType(System.Security.Principal.SecurityIdentifier))
 Dim currentRule As System.Security.AccessControl.FileSystemAccessRule
 Dim denyread As Boolean = False
 Dim allowread As Boolean = False
 For x As Integer = 0 To acl.Count - 1
  currentRule = acl(x)
  If currentUser.User.Equals(currentRule.IdentityReference) Or currentPrinciple.IsInRole(currentRule.IdentityReference) Then
   If currentRule.AccessControlType.Equals(Security.AccessControl.AccessControlType.Deny) Then
    If (currentRule.FileSystemRights And Security.AccessControl.FileSystemRights.Write) = Security.AccessControl.FileSystemRights.Write Then denyread = True
   Else
    If currentRule.AccessControlType.Equals(AccessControlType.Allow) Then allowread = True
   End If
  End If
 Next
 If allowread And Not (denyread) Then
  Return True
 Else
  Return False
 End If
End Function


Title: Re: Directory Access
Post by: Jeff H on November 16, 2011, 11:00:47 AM

Thanks Huiz