Cara: Menambahkan atau menghapus entri daftar kontrol akses

Untuk menambahkan atau menghapus entri daftar kontrol akses (ACL) dari file atau direktori, dapatkan FileSecurity objek atau DirectorySecurity dari file atau direktori. Ubah objek, lalu terapkan kembali ke file atau direktori.

Dari file

1. FileSystemAclExtensions.GetAccessControl(FileInfo) Panggil metode (atau, untuk aplikasi .NET Framework, FileInfo.GetAccessControl) untuk mendapatkan FileSecurity objek yang berisi entri ACL file saat ini.

2. Tambahkan atau hapus entri ACL dari objek yang FileSecurity diperoleh di langkah 1.

3. Untuk menerapkan perubahan, teruskan FileSecurity objek ke FileSystemAclExtensions.SetAccessControl(FileInfo, FileSecurity) metode (atau, untuk aplikasi .NET Framework, FileInfo.SetAccessControl) .

Dari direktori

1. FileSystemAclExtensions.GetAccessControl(DirectoryInfo) Panggil metode (atau, untuk aplikasi .NET Framework, DirectoryInfo.GetAccessControl) untuk mendapatkan DirectorySecurity objek yang berisi entri ACL direktori saat ini.

2. Tambahkan atau hapus entri ACL dari objek yang DirectorySecurity diperoleh di langkah 1.

3. Untuk menerapkan perubahan, teruskan DirectorySecurity objek ke FileSystemAclExtensions.SetAccessControl(DirectoryInfo, DirectorySecurity) metode (atau, untuk aplikasi .NET Framework, DirectoryInfo.SetAccessControl) .

Contoh

Anda harus menentukan akun pengguna atau grup yang valid untuk menjalankan contoh ini. Contoh ini menggunakan objek FileInfo. Gunakan prosedur yang sama untuk DirectoryInfo kelas .

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