Instrukcje: dodawanie lub usuwanie wpisów listy kontroli dostępu

Aby dodać lub usunąć wpisy listy kontroli dostępu (ACL) z pliku lub katalogu, pobierz FileSecurity obiekt lub DirectorySecurity z pliku lub katalogu. Zmodyfikuj obiekt, a następnie zastosuj go z powrotem do pliku lub katalogu.

Z pliku

1. Wywołaj metodę FileSystemAclExtensions.GetAccessControl(FileInfo) (lub dla aplikacji FileInfo.GetAccessControl.NET Framework ), aby uzyskać FileSecurity obiekt zawierający bieżące wpisy listy ACL pliku.

2. Dodaj lub usuń wpisy listy ACL z FileSecurity obiektu uzyskanego w kroku 1.

3. Aby zastosować zmiany, przekaż FileSecurity obiekt do FileSystemAclExtensions.SetAccessControl(FileInfo, FileSecurity) metody (lub dla aplikacji .NET Framework). FileInfo.SetAccessControl

Z katalogu

1. Wywołaj metodę FileSystemAclExtensions.GetAccessControl(DirectoryInfo) (lub dla aplikacji DirectoryInfo.GetAccessControl.NET Framework ), aby uzyskać DirectorySecurity obiekt zawierający bieżące wpisy listy ACL katalogu.

2. Dodaj lub usuń wpisy listy ACL z DirectorySecurity obiektu uzyskanego w kroku 1.

3. Aby zastosować zmiany, przekaż DirectorySecurity obiekt do FileSystemAclExtensions.SetAccessControl(DirectoryInfo, DirectorySecurity) metody (lub dla aplikacji .NET Framework). DirectoryInfo.SetAccessControl

Przykład

Aby uruchomić ten przykład, należy określić prawidłowe konto użytkownika lub grupy. W przykładzie użyto FileInfo obiektu . Użyj tej samej procedury dla DirectoryInfo klasy .

using System;
using System.IO;
using System.Security.AccessControl;

    class FileExample
    {
        public static void Main()
        {
            try
            {
                string fileName = "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 (Exception e)
            {
                Console.WriteLine(e);
            }
        }

        // Adds an ACL entry on the specified file for the specified account.
        public static void AddFileSecurity(string fileName, string account,
            FileSystemRights rights, AccessControlType controlType)
        {
            FileInfo fileInfo = new(fileName);
            FileSecurity fSecurity = fileInfo.GetAccessControl();

            // Add the FileSystemAccessRule to the security settings.
            fSecurity.AddAccessRule(new FileSystemAccessRule(account,
                rights, controlType));

            // Set the new access settings.
            fileInfo.SetAccessControl(fSecurity);
        }

        // Removes an ACL entry on the specified file for the specified account.
        public static void RemoveFileSecurity(string fileName, string account,
            FileSystemRights rights, AccessControlType controlType)
        {
            FileInfo fileInfo = new(fileName);
            FileSecurity fSecurity = fileInfo.GetAccessControl();

            // Remove the FileSystemAccessRule from the security settings.
            fSecurity.RemoveAccessRule(new FileSystemAccessRule(account,
                rights, controlType));

            // Set the new access settings.
            fileInfo.SetAccessControl(fSecurity);
        }
}

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)

        Dim fileInfo As New FileInfo(fileName)
        Dim fSecurity As FileSecurity = fileInfo.GetAccessControl()

        ' Add the FileSystemAccessRule to the security settings. 
        Dim accessRule As New FileSystemAccessRule(account, rights, controlType)

        fSecurity.AddAccessRule(accessRule)

        ' Set the new access settings.
        fileInfo.SetAccessControl(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)

        Dim fileInfo As New FileInfo(fileName)
        Dim fSecurity As FileSecurity = fileInfo.GetAccessControl()

        ' Remove the FileSystemAccessRule from the security settings. 
        fSecurity.RemoveAccessRule(New FileSystemAccessRule(account,
            rights, controlType))

        ' Set the new access settings.
        fileInfo.SetAccessControl(fSecurity)

    End Sub
End Module