File.SetAccessControl(String, FileSecurity) Metode

Referensi

Definisi

Ruang nama:: System.IO

Rakitan:: mscorlib.dll

Penting

Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.

Menerapkan entri daftar kontrol akses (ACL) yang FileSecurity dijelaskan oleh objek ke file yang ditentukan.

public:
 static void SetAccessControl(System::String ^ path, System::Security::AccessControl::FileSecurity ^ fileSecurity);

public static void SetAccessControl (string path, System.Security.AccessControl.FileSecurity fileSecurity);

static member SetAccessControl : string * System.Security.AccessControl.FileSecurity -> unit

Public Shared Sub SetAccessControl (path As String, fileSecurity As FileSecurity)

Parameter

path: String

File untuk menambahkan atau menghapus entri daftar kontrol akses (ACL).

fileSecurity: FileSecurity

Objek FileSecurity yang menjelaskan entri ACL untuk diterapkan ke file yang dijelaskan oleh path parameter .

Pengecualian

IOException

Terjadi kesalahan I/O saat membuka file.

SEHException

Parameternya path adalah null.

SystemException

File tidak dapat ditemukan.

UnauthorizedAccessException

Parameter path menentukan file yang bersifat baca-saja.

-atau-

Operasi ini tidak didukung pada platform saat ini.

-atau-

Parameter path menentukan direktori.

-atau-

Pemanggil tidak memiliki izin yang diperlukan.

ArgumentNullException

Parameternya fileSecurity adalah null.

Contoh

Contoh kode berikut menggunakan GetAccessControl metode dan SetAccessControl 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 namespace System;
using namespace System::IO;
using namespace System::Security::AccessControl;

// Adds an ACL entry on the specified file for the specified account.

void AddFileSecurity(String^ fileName, String^ account, 
                        FileSystemRights rights, AccessControlType controlType)
{
    // Get a FileSecurity object that represents the 
    // current security settings.
    FileSecurity^ fSecurity = File::GetAccessControl(fileName);

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

    // Set the new access settings.
    File::SetAccessControl(fileName, fSecurity);
}

// Removes an ACL entry on the specified file for the specified account.

void RemoveFileSecurity(String^ fileName, String^ account, 
                        FileSystemRights rights, AccessControlType controlType)
{

    // Get a FileSecurity object that represents the 
    // current security settings.
    FileSecurity^ fSecurity = File::GetAccessControl(fileName);

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

    // Set the new access settings.
    File::SetAccessControl(fileName, fSecurity);
}

int main()
{
    try
    {
        String^ fileName = "test.xml";

        Console::WriteLine("Adding access control entry for " + fileName);

        // Add the access control entry to the file.
        AddFileSecurity(fileName, "MYDOMAIN\\MyAccount", 
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Removing access control entry from " + fileName);

        // Remove the access control entry from the file.
        RemoveFileSecurity(fileName, "MYDOMAIN\\MyAccount", 
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Done.");
    }
    catch (Exception^ ex)
    {
        Console::WriteLine(ex->Message);
    }
}

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)
        {

            // Get a FileSecurity object that represents the
            // current security settings.
            FileSecurity fSecurity = File.GetAccessControl(fileName);

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

            // Set the new access settings.
            File.SetAccessControl(fileName, 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)
        {

            // Get a FileSecurity object that represents the
            // current security settings.
            FileSecurity fSecurity = File.GetAccessControl(fileName);

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

            // Set the new access settings.
            File.SetAccessControl(fileName, fSecurity);
        }
    }
}

open System.IO
open System.Security.AccessControl

// Adds an ACL entry on the specified file for the specified account.
let addFileSecurity fileName (account: string) rights controlType =
    // Get a FileSecurity object that represents the
    // current security settings.
    let fSecurity = File.GetAccessControl fileName

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

    // Set the new access settings.
    File.SetAccessControl(fileName, fSecurity)

// Removes an ACL entry on the specified file for the specified account.
let removeFileSecurity fileName (account: string) rights controlType =
    // Get a FileSecurity object that represents the
    // current security settings.
    let fSecurity = File.GetAccessControl fileName

    // Remove the FileSystemAccessRule from the security settings.
    fSecurity.RemoveAccessRule(FileSystemAccessRule(account, rights, controlType))
    |> ignore

    // Set the new access settings.
    File.SetAccessControl(fileName, fSecurity)

let fileName = "test.xml"

printfn $"Adding access control entry for {fileName}"

// Add the access control entry to the file.
addFileSecurity fileName @"DomainName\AccountName" FileSystemRights.ReadData AccessControlType.Allow

printfn $"Removing access control entry from {fileName}"

// Remove the access control entry from the file.
removeFileSecurity fileName @"DomainName\AccountName" FileSystemRights.ReadData AccessControlType.Allow

printfn "Done."

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)

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

        ' Set the new access settings.
        File.SetAccessControl(fileName, fSecurity)

    End Sub
End Module

Keterangan

Metode ini SetAccessControl menerapkan entri daftar kontrol akses (ACL) ke file yang mewakili daftar ACL yang tidak diwariskan.

Perhatian

ACL yang ditentukan untuk fileSecurity parameter menggantikan ACL yang ada untuk file. Untuk menambahkan izin bagi pengguna baru, gunakan GetAccessControl metode untuk mendapatkan ACL yang ada, ubah, lalu gunakan SetAccessControl untuk menerapkannya kembali ke file.

ACL menjelaskan individu dan/atau grup yang memiliki, atau tidak memiliki, hak atas tindakan tertentu pada file yang diberikan. Untuk mengetahui informasi selengkapnya, lihat Petunjuk: Menambahkan atau Menghapus Entri Daftar Kontrol Akses.

Metode ini SetAccessControl hanya FileSecurity menyimpan objek yang telah dimodifikasi setelah pembuatan objek. FileSecurity Jika objek belum dimodifikasi, objek tidak akan dipertahankan ke file. Oleh karena itu, tidak mungkin untuk mengambil FileSecurity objek dari satu file dan menerapkan kembali objek yang sama ke file lain.

Untuk menyalin informasi ACL dari satu file ke file lainnya:

GetAccessControl Gunakan metode untuk mengambil FileSecurity objek dari file sumber.
Create objek baru FileSecurity untuk file tujuan.
GetSecurityDescriptorBinaryForm Gunakan metode atau GetSecurityDescriptorSddlForm objek sumber FileSecurity untuk mengambil informasi ACL.
SetSecurityDescriptorBinaryForm Gunakan metode atau SetSecurityDescriptorSddlForm untuk menyalin informasi yang diambil di langkah 3 ke objek tujuanFileSecurity.
Atur objek tujuan FileSecurity ke file tujuan menggunakan SetAccessControl metode .

Di lingkungan NTFS, ReadAttributes dan ReadExtendedAttributes diberikan kepada pengguna jika pengguna memiliki ListDirectory hak pada folder induk. Untuk menolak ReadAttributes dan ReadExtendedAttributes, tolak ListDirectory pada direktori induk.

Berlaku untuk

Lihat juga

FileSystemWatcher

Bagikan melalui

File.SetAccessControl(String, FileSecurity) Metode

Definisi

Parameter

Pengecualian

Contoh

Keterangan

Berlaku untuk

Lihat juga

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