File.SetAccessControl(String, FileSecurity) Método

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)

Parâmetros

Exceções

Exemplos

O exemplo de código a seguir usa os GetAccessControl métodos e SetAccessControl para adicionar e, em seguida, remover uma entrada acl (lista de controle de acesso) de um arquivo. Você deve fornecer uma conta de grupo ou de usuário válida para executar este exemplo.

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

Comentários

O SetAccessControl método aplica entradas de ACL (lista de controle de acesso) a um arquivo que representa a lista de ACL não herdada.

Uma ACL descreve indivíduos e/ou grupos que têm ou não direitos a ações específicas no arquivo especificado. Para saber mais, confira Como adicionar ou remover entradas da lista de controle de acesso.

O SetAccessControl método persiste apenas FileSecurity objetos que foram modificados após a criação do objeto. Se um FileSecurity objeto não tiver sido modificado, ele não será persistido em um arquivo. Portanto, não é possível recuperar um FileSecurity objeto de um arquivo e reaplicar o mesmo objeto a outro arquivo.

Para copiar informações de ACL de um arquivo para outro:

1. Use o GetAccessControl método para recuperar o FileSecurity objeto do arquivo de origem.

2. Create um novo FileSecurity objeto para o arquivo de destino.

3. Use o GetSecurityDescriptorBinaryForm método ou GetSecurityDescriptorSddlForm do objeto de origem FileSecurity para recuperar as informações de ACL.

4. Use o SetSecurityDescriptorBinaryForm método ou SetSecurityDescriptorSddlForm para copiar as informações recuperadas na etapa 3 para o objeto de destino FileSecurity .

5. Defina o objeto de destino FileSecurity como o arquivo de destino usando o SetAccessControl método .

Em ambientes NTFS, ReadAttributes e ReadExtendedAttributes são concedidos ao usuário se o usuário tiver ListDirectory direitos na pasta pai. Para negar ReadAttributes e ReadExtendedAttributes, negue ListDirectory no diretório pai.

Aplica-se a

Confira também

• FileSystemWatcher