FileInfo.SetAccessControl(FileSecurity) Methode

public:
 void SetAccessControl(System::Security::AccessControl::FileSecurity ^ fileSecurity);

public void SetAccessControl (System.Security.AccessControl.FileSecurity fileSecurity);

member this.SetAccessControl : System.Security.AccessControl.FileSecurity -> unit

Public Sub SetAccessControl (fileSecurity As FileSecurity)

Parameter

Ausnahmen

Beispiele

Im folgenden Codebeispiel werden die GetAccessControl -Methode und die SetAccessControl -Methode verwendet, um einen ACL-Eintrag hinzuzufügen und dann aus einer Datei zu entfernen. Sie müssen ein gültiges Benutzer- oder Gruppenkonto angeben, um dieses Beispiel auszuführen.

#using <System.Security.dll>
using namespace System;
using namespace System::IO;
using namespace System::Security::AccessControl;
using namespace System::Security::Principal;

// Adds an ACL entry on the specified file for the specified account.
static void AddFileSecurity(String^ fileName, String^ account,
                     FileSystemRights^ rights, 
                     AccessControlType^ controlType)
{
    // Create a new FileInfo object.
    FileInfo^ fInfo = gcnew FileInfo(fileName);
    if (!fInfo->Exists)
    {
        fInfo->Create();
    }

    // Get a FileSecurity object that represents the
    // current security settings.
    FileSecurity^ fSecurity = fInfo->GetAccessControl();

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

    // Set the new access settings.
    fInfo->SetAccessControl(fSecurity);
}

// Removes an ACL entry on the specified file for the specified account.
static void RemoveFileSecurity(String^ fileName, String^ account,
                        FileSystemRights^ rights, 
                        AccessControlType^ controlType)
{
    // Create a new FileInfo object.
    FileInfo^ fInfo = gcnew FileInfo(fileName);
    if (!fInfo->Exists)
    {
        fInfo->Create();
    }

    // Get a FileSecurity object that represents the
    // current security settings.
    FileSecurity^ fSecurity = fInfo->GetAccessControl();

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

    // Set the new access settings.
    fInfo->SetAccessControl(fSecurity);
}

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

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

        // Add the access control entry to the file.
        // Before compiling this snippet, change MyDomain to your 
        // domain name and MyAccessAccount to the name 
        // you use to access your domain.
        AddFileSecurity(fileName, "MyDomain\\MyAccessAccount",
            FileSystemRights::ReadData, AccessControlType::Allow);

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

        // Remove the access control entry from the file.
        // Before compiling this snippet, change MyDomain to your 
        // domain name and MyAccessAccount to the name 
        // you use to access your domain.
        RemoveFileSecurity(fileName, "MyDomain\\MyAccessAccount",
            FileSystemRights::ReadData, AccessControlType::Allow);

        Console::WriteLine("Done.");
    }
    catch (Exception^ e)
    {
        Console::WriteLine(e);
    }

}
//This code produces output similar to the following; 
//results may vary based on the computer/file structure/etc.:
//
//Adding access control entry for c:\test.xml
//Removing access control entry from c:\test.xml
//Done.
//

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

namespace FileSystemExample
{
    class FileExample
    {
        public static void Main()
        {
            try
            {
                string FileName = "c:/test.xml";

                Console.WriteLine("Adding access control entry for " + FileName);

                // Add the access control entry to the file.
                // Before compiling this snippet, change MyDomain to your
                // domain name and MyAccessAccount to the name
                // you use to access your domain.
                AddFileSecurity(FileName, @"MyDomain\MyAccessAccount", FileSystemRights.ReadData, AccessControlType.Allow);

                Console.WriteLine("Removing access control entry from " + FileName);

                // Remove the access control entry from the file.
                // Before compiling this snippet, change MyDomain to your
                // domain name and MyAccessAccount to the name
                // you use to access your domain.
                RemoveFileSecurity(FileName, @"MyDomain\MyAccessAccount", 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)
        {
            // Create a new FileInfo object.
            FileInfo fInfo = new FileInfo(FileName);

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

            // Add the FileSystemAccessRule to the security settings.
            fSecurity.AddAccessRule(new FileSystemAccessRule(Account,
                                                            Rights,
                                                            ControlType));

            // Set the new access settings.
            fInfo.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)
        {
            // Create a new FileInfo object.
            FileInfo fInfo = new FileInfo(FileName);

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

            // Add the FileSystemAccessRule to the security settings.
            fSecurity.RemoveAccessRule(new FileSystemAccessRule(Account,
                                                            Rights,
                                                            ControlType));

            // Set the new access settings.
            fInfo.SetAccessControl(fSecurity);
        }
    }
}
//This code produces output similar to the following;
//results may vary based on the computer/file structure/etc.:
//
//Adding access control entry for c:\test.xml
//Removing access control entry from c:\test.xml
//Done.
//

Imports System.IO
Imports System.Security.AccessControl



Module FileExample

    Sub Main()
        Try
            Dim FileName As String = "c:\test.xml"

            Console.WriteLine("Adding access control entry for " & FileName)

            ' Add the access control entry to the file.
            ' Before compiling this snippet, change MyDomain to your 
            ' domain name and MyAccessAccount to the name 
            ' you use to access your domain.
            AddFileSecurity(FileName, "MyDomain\\MyAccessAccount", FileSystemRights.ReadData, AccessControlType.Allow)

            Console.WriteLine("Removing access control entry from " & FileName)

            ' Remove the access control entry from the file.
            ' Before compiling this snippet, change MyDomain to your 
            ' domain name and MyAccessAccount to the name 
            ' you use to access your domain.
            RemoveFileSecurity(FileName, "MyDomain\\MyAccessAccount", 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)
        ' Create a new FileInfo object.
        Dim fInfo As New FileInfo(FileName)

        ' Get a FileSecurity object that represents the 
        ' current security settings.
        Dim fSecurity As FileSecurity = fInfo.GetAccessControl()

        ' Add the FileSystemAccessRule to the security settings. 
        fSecurity.AddAccessRule(New FileSystemAccessRule(Account, Rights, ControlType))

        ' Set the new access settings.
        fInfo.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)
        ' Create a new FileInfo object.
        Dim fInfo As New FileInfo(FileName)

        ' Get a FileSecurity object that represents the 
        ' current security settings.
        Dim fSecurity As FileSecurity = fInfo.GetAccessControl()

        ' Add the FileSystemAccessRule to the security settings. 
        fSecurity.RemoveAccessRule(New FileSystemAccessRule(Account, Rights, ControlType))

        ' Set the new access settings.
        fInfo.SetAccessControl(fSecurity)

    End Sub
End Module
'This code produces output similar to the following; 
'results may vary based on the computer/file structure/etc.:
'
'Adding access control entry for c:\test.xml
'Removing access control entry from c:\test.xml
'Done.
'

Hinweise

Die SetAccessControl Methode wendet Zugriffssteuerungslisteneinträge (Access Control List, ACL) auf die aktuelle Datei an, die die nicht inheritierte ACL-Liste darstellt.

Verwenden Sie die SetAccessControl -Methode immer dann, wenn Sie ACL-Einträge hinzufügen oder daraus entfernen müssen.

Eine ACL beschreibt Personen und/oder Gruppen, die Rechte auf bestimmte Aktionen für die angegebene Datei haben oder nicht haben. Weitere Informationen finden Sie unter Vorgehensweise: Hinzufügen oder Entfernen von Zugriffssteuerungslisten-Einträgen.

Die SetAccessControl -Methode behält nur FileSecurity Objekte bei, die nach der Objekterstellung geändert wurden. Wenn ein FileSecurity Objekt nicht geändert wurde, wird es nicht in einer Datei beibehalten. Daher ist es nicht möglich, ein FileSecurity Objekt aus einer Datei abzurufen und dasselbe Objekt auf eine andere Datei erneut zu verwenden.

So kopieren Sie ACL-Informationen aus einer Datei in eine andere:

1. Verwenden Sie die GetAccessControl -Methode, um das FileSecurity -Objekt aus der Quelldatei abzurufen.

2. Erstellen Sie ein neues FileSecurity Objekt für die Zieldatei.

3. Verwenden Sie die GetSecurityDescriptorBinaryForm -Methode oder GetSecurityDescriptorSddlForm des Quellobjekts FileSecurity , um die ACL-Informationen abzurufen.

4. Verwenden Sie die SetSecurityDescriptorBinaryForm -Methode oder SetSecurityDescriptorSddlForm , um die in Schritt 3 abgerufenen Informationen in das Zielobjekt FileSecurity zu kopieren.

5. Legen Sie das Zielobjekt FileSecurity mithilfe der -Methode auf die SetAccessControl Zieldatei fest.

Gilt für: