FileSystemAclExtensions.Create Metodo

public:
[System::Runtime::CompilerServices::Extension]
 static void Create(System::IO::DirectoryInfo ^ directoryInfo, System::Security::AccessControl::DirectorySecurity ^ directorySecurity);

public static void Create(this System.IO.DirectoryInfo directoryInfo, System.Security.AccessControl.DirectorySecurity directorySecurity);

static member Create : System.IO.DirectoryInfo * System.Security.AccessControl.DirectorySecurity -> unit

<Extension()>
Public Sub Create (directoryInfo As DirectoryInfo, directorySecurity As DirectorySecurity)

Parametri

Eccezioni

Esempio

Nell'esempio di codice seguente viene creata una nuova directory all'interno della cartella temporanea dell'utente con gli attributi di sicurezza della directory specificati:

using System.IO;
using System.Runtime.Versioning;
using System.Security.AccessControl;
using System.Security.Principal;

namespace MyNamespace
{
    public class MyClassCS
    {
        // Attribute to address CA1416 warning:
        // System.IO.FileSystem.AccessControl APIs are  only available on Windows
        [SupportedOSPlatform("windows")]
        static void Main()
        {
            // Create the file security object

            SecurityIdentifier identity = new SecurityIdentifier(
                WellKnownSidType.BuiltinUsersSid, // This maps to "Everyone" user group in Windows
                null); // null is OK for this particular user group. For others, a non-empty value might be required
            FileSystemAccessRule accessRule = new FileSystemAccessRule(identity, FileSystemRights.FullControl, AccessControlType.Allow);

            DirectorySecurity expectedSecurity = new DirectorySecurity();
            expectedSecurity.AddAccessRule(accessRule);

            // Make sure the directory does not exist, then create it

            string dirPath = Path.Combine(Path.GetTempPath(), "directoryToCreate");
            DirectoryInfo dirInfo = new DirectoryInfo(dirPath);
            if (dirInfo.Exists)
            {
                dirInfo.Delete(recursive: true);
            }

            dirInfo.Create(expectedSecurity);
        }
    }
}

Commenti

Questo metodo di estensione è stato aggiunto a .NET Core per portare la funzionalità fornita dal metodo DirectoryInfo.Create(DirectorySecurity) .NET Framework.

public:
[System::Runtime::CompilerServices::Extension]
 static System::IO::FileStream ^ Create(System::IO::FileInfo ^ fileInfo, System::IO::FileMode mode, System::Security::AccessControl::FileSystemRights rights, System::IO::FileShare share, int bufferSize, System::IO::FileOptions options, System::Security::AccessControl::FileSecurity ^ fileSecurity);

public static System.IO.FileStream Create(this System.IO.FileInfo fileInfo, System.IO.FileMode mode, System.Security.AccessControl.FileSystemRights rights, System.IO.FileShare share, int bufferSize, System.IO.FileOptions options, System.Security.AccessControl.FileSecurity? fileSecurity);

public static System.IO.FileStream Create(this System.IO.FileInfo fileInfo, System.IO.FileMode mode, System.Security.AccessControl.FileSystemRights rights, System.IO.FileShare share, int bufferSize, System.IO.FileOptions options, System.Security.AccessControl.FileSecurity fileSecurity);

static member Create : System.IO.FileInfo * System.IO.FileMode * System.Security.AccessControl.FileSystemRights * System.IO.FileShare * int * System.IO.FileOptions * System.Security.AccessControl.FileSecurity -> System.IO.FileStream

<Extension()>
Public Function Create (fileInfo As FileInfo, mode As FileMode, rights As FileSystemRights, share As FileShare, bufferSize As Integer, options As FileOptions, fileSecurity As FileSecurity) As FileStream

Parametri

Valori restituiti

Flusso di file per il file appena creato.

Eccezioni

Esempio

Nell'esempio di codice seguente viene creato un nuovo file di testo all'interno della cartella temporanea dell'utente, specificando in modo esplicito tutti gli attributi di sicurezza:

using System;
using System.IO;
using System.Runtime.Versioning;
using System.Security.AccessControl;
using System.Security.Principal;
using System.Text;

namespace MyNamespace
{
    public class MyClassCS
    {
        // Attribute to address CA1416 warning:
        // System.IO.FileSystem.AccessControl APIs are  only available on Windows
        [SupportedOSPlatform("windows")]
        static void Main()
        {
            // Create the file security object

            var identity = new SecurityIdentifier(WellKnownSidType.BuiltinUsersSid, null);
            var accessRule = new FileSystemAccessRule(identity, FileSystemRights.FullControl, AccessControlType.Allow);

            var security = new FileSecurity();
            security.AddAccessRule(accessRule);

            // Make sure the file does not exist, or FileMode.CreateNew will throw

            string filePath = Path.Combine(Path.GetTempPath(), "temp.txt");
            var fileInfo = new FileInfo(filePath);
            if (fileInfo.Exists)
            {
                fileInfo.Delete();
            }

            // Create the file with the specified security and write some text

            using (FileStream stream = fileInfo.Create(
                FileMode.CreateNew,
                FileSystemRights.FullControl,
                FileShare.ReadWrite,
                4096, // Default buffer size
                FileOptions.None,
                security))
            {
                string text = "Hello world!";
                byte[] writeBuffer = new UTF8Encoding(encoderShouldEmitUTF8Identifier: true).GetBytes(text);

                stream.Write(writeBuffer, 0, writeBuffer.Length);
            } // Dispose flushes the file to disk
        }
    }
}

Commenti

Questo metodo di estensione è stato aggiunto a .NET Core per portare le funzionalità fornite da:

• Costruttore FileStream(String, FileMode, FileSystemRights, FileShare, Int32, FileOptions, FileSecurity) .NET Framework.
• Metodo File.Create(String, Int32, FileOptions, FileSecurity .NET Framework.