FileSystemAccessRule Class
Assembly: mscorlib (in mscorlib.dll)
The FileSystemAccessRule class represents an abstraction of an underlying access control entry (ACE) that specifies a user account, the type of access to provide (read, write, and so on), and whether to allow or deny that right. This class can also specify how access rules are propagated to child objects.
Use the FileSystemAccessRule class to create a new access rule. You can persist the rule using the FileSecurity or DirectorySecurity class.
The following code example uses the FileSecurity class to add and then remove an access control entry (ACE) from a file. You must supply a valid user or group account to run this example.
Imports System Imports System.IO Imports System.Security.AccessControl Module FileExample Sub Main() Try Dim fileName As String = "test.xml" Console.WriteLine("Adding access control entry for " & fileName) ' Add the access control entry to the file. AddFileSecurity(fileName, "DomainName\AccountName", _ FileSystemRights.ReadData, AccessControlType.Allow) Console.WriteLine("Removing access control entry from " & fileName) ' Remove the access control entry from the file. RemoveFileSecurity(fileName, "DomainName\AccountName", _ FileSystemRights.ReadData, AccessControlType.Allow) Console.WriteLine("Done.") Catch e As Exception Console.WriteLine(e) End Try End Sub ' Adds an ACL entry on the specified file for the specified account. Sub AddFileSecurity(ByVal fileName As String, ByVal account As String, _ ByVal rights As FileSystemRights, ByVal controlType As AccessControlType) ' Get a FileSecurity object that represents the ' current security settings. Dim fSecurity As FileSecurity = File.GetAccessControl(fileName) ' Add the FileSystemAccessRule to the security settings. Dim accessRule As FileSystemAccessRule = _ New FileSystemAccessRule(account, rights, controlType) fSecurity.AddAccessRule(accessRule) ' Set the new access settings. File.SetAccessControl(fileName, fSecurity) End Sub ' Removes an ACL entry on the specified file for the specified account. Sub RemoveFileSecurity(ByVal fileName As String, ByVal account As String, _ ByVal rights As FileSystemRights, ByVal controlType As AccessControlType) ' Get a FileSecurity object that represents the ' current security settings. Dim fSecurity As FileSecurity = File.GetAccessControl(fileName) ' Add the FileSystemAccessRule to the security settings. fSecurity.RemoveAccessRule(New FileSystemAccessRule(account, _ rights, controlType)) ' Set the new access settings. File.SetAccessControl(fileName, fSecurity) End Sub End Module
System.Security.AccessControl.AuthorizationRule
System.Security.AccessControl.AccessRule
System.Security.AccessControl.FileSystemAccessRule
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.