FileSystemSecurity.AddAccessRule(FileSystemAccessRule) Metode

Definisi

Ruang nama:

System.Security.AccessControl

Rakitan:

System.IO.FileSystem.AccessControl.dll

Menambahkan izin daftar kontrol akses (ACL) yang ditentukan ke file atau direktori saat ini.

public:
 void AddAccessRule(System::Security::AccessControl::FileSystemAccessRule ^ rule);

public void AddAccessRule(System.Security.AccessControl.FileSystemAccessRule rule);

override this.AddAccessRule : System.Security.AccessControl.FileSystemAccessRule -> unit

Public Sub AddAccessRule (rule As FileSystemAccessRule)

Parameter

rule

FileSystemAccessRule

Objek FileSystemAccessRule yang mewakili izin daftar kontrol akses (ACL) untuk ditambahkan ke file atau direktori.

Pengecualian

ArgumentNullException

Parameternya rule adalah null.

Contoh

Contoh kode berikut menggunakan FileSecurity kelas untuk menambahkan lalu menghapus entri daftar kontrol akses (ACL) dari file. Anda harus menyediakan akun pengguna atau grup yang valid untuk menjalankan contoh ini.

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

namespace FileSystemExample
{
    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

Keterangan

Metode menambahkan AddAccessRule aturan baru ke daftar aturan yang FileSystemSecurity terkandung dalam objek.

Jika daftar kontrol akses (ACL) sudah ada untuk aturan yang ditentukan, AddAccessRule metode akan tetap menambahkan aturan, dengan satu pengecualian: objek yang FileSystemAccessRule dibuat menggunakan Deny nilai enumerasi menggantikan objek yang dibuat menggunakan Allow nilai enumerasi.

Gunakan metode dependen implementasi .NET berikut untuk menambahkan atau mengambil informasi ACL dari file:

Implementasi .NET	Menambahkan aturan	Mengambil aturan
.NET	FileSystemAclExtensions.SetAccessControl(FileInfo, FileSecurity)	FileSystemAclExtensions.GetAccessControl(FileInfo)
.NET Framework	FileInfo.SetAccessControl(FileSecurity)	FileInfo.GetAccessControl()

Saat Anda menambahkan aturan akses tanpa mengatur Synchronize bendera, Synchronize bendera akan secara otomatis ditambahkan ke aturan Anda. Jika Anda menghapus aturan nanti tanpa menentukan Synchronize bendera, bendera akan dihapus secara otomatis.