FileSystemSecurity.AddAccessRule(FileSystemAccessRule) Método

Definición

Espacio de nombres:

System.Security.AccessControl

Ensamblado:

System.IO.FileSystem.AccessControl.dll

Agrega el permiso de lista de control de acceso (ACL) especificado al archivo o directorio actual.

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)

Parámetros

rule

FileSystemAccessRule

Objeto FileSystemAccessRule que representa un permiso de lista de control de acceso (ACL) para agregar a un archivo o directorio.

Excepciones

ArgumentNullException

El parámetro rule es null.

Ejemplos

En el ejemplo de código siguiente se usa la clase FileSecurity para agregar y, a continuación, quitar una entrada de lista de control de acceso (ACL) de un archivo. Debe proporcionar una cuenta de usuario o grupo válida para ejecutar este ejemplo.

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

Comentarios

El método AddAccessRule agrega una nueva regla a la lista de reglas contenidas en un objeto FileSystemSecurity.

Si ya existe una lista de control de acceso (ACL) para la regla especificada, el método AddAccessRule seguirá agregando la regla, con una excepción: un objeto FileSystemAccessRule creado con el valor de enumeración Deny reemplaza a un objeto creado mediante el valor de enumeración Allow.

Use los siguientes métodos dependientes de implementación de .NET para agregar o recuperar información de ACL de un archivo:

Implementación de .NET	Agregar reglas	Recuperación de reglas
.RED	FileSystemAclExtensions.SetAccessControl(FileInfo, FileSecurity)	FileSystemAclExtensions.GetAccessControl(FileInfo)
.NET Framework	FileInfo.SetAccessControl(FileSecurity)	FileInfo.GetAccessControl()

Al agregar una regla de acceso sin establecer la marca de Synchronize, la marca Synchronize se agregará automáticamente a la regla. Si quita la regla más adelante sin especificar la marca Synchronize, la marca se quitará automáticamente.