SecurityAction Enumerazione

Definizione

public enum class SecurityAction

[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public enum SecurityAction

public enum SecurityAction

[System.Serializable]
public enum SecurityAction

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public enum SecurityAction

[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type SecurityAction = 

type SecurityAction = 

[<System.Serializable>]
type SecurityAction = 

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type SecurityAction = 

Public Enum SecurityAction

Ereditarietà

Object

ValueType

Enum

SecurityAction

Attributi

ObsoleteAttribute SerializableAttribute ComVisibleAttribute

Campi

Esempio

In questo esempio viene illustrato come notificare al CLR che il codice nei metodi chiamati ha solo IsolatedStoragePermissione illustra anche come scrivere e leggere dall'archiviazione isolata.

using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::IO::IsolatedStorage;
using namespace System::IO;


static void WriteIsolatedStorage()
{
    try
    {
        // Attempt to create a storage file that is isolated by
        // user and assembly. IsolatedStorageFilePermission
        // granted to the attribute at the top of this file
        // allows CLR to load this assembly and execution of this
        // statement.
        Stream^ fileCreateStream = gcnew
            IsolatedStorageFileStream(
            "AssemblyData",
            FileMode::Create,
            IsolatedStorageFile::GetUserStoreForAssembly());

        StreamWriter^ streamWriter = gcnew StreamWriter(
            fileCreateStream);
        try
        {
            // Write some data out to the isolated file.

            streamWriter->Write("This is some test data.");
            streamWriter->Close();	
        }
        finally
        {
            delete fileCreateStream;
            delete streamWriter;
        } 
    }
    catch (IOException^ ex)
    {
        Console::WriteLine(ex->Message);
    }

    try
    {
        Stream^ fileOpenStream =
            gcnew IsolatedStorageFileStream(
            "AssemblyData",
            FileMode::Open,
            IsolatedStorageFile::GetUserStoreForAssembly());
        // Attempt to open the file that was previously created.

        StreamReader^ streamReader = gcnew StreamReader(
            fileOpenStream);
        try
        { 
            // Read the data from the file and display it.

            Console::WriteLine(streamReader->ReadLine());
            streamReader->Close();
        }
        finally
        {
            delete fileOpenStream;
            delete streamReader;
        }
    }
    catch (FileNotFoundException^ ex)
    {
        Console::WriteLine(ex->Message);
    }
    catch (IOException^ ex)
    {
        Console::WriteLine(ex->Message);
    }
}
// Notify the CLR to only grant IsolatedStorageFilePermission to called methods. 
// This restricts the called methods to working only with storage files that are isolated 
// by user and assembly.
[IsolatedStorageFilePermission(SecurityAction::PermitOnly, UsageAllowed = IsolatedStorageContainment::AssemblyIsolationByUser)]
int main()
{
    WriteIsolatedStorage();
}

// This code produces the following output.
//
//  This is some test data.

using System;
using System.Security.Permissions;
using System.IO.IsolatedStorage;
using System.IO;

// Notify the CLR to only grant IsolatedStorageFilePermission to called methods.
// This restricts the called methods to working only with storage files that are isolated
// by user and assembly.
[IsolatedStorageFilePermission(SecurityAction.PermitOnly, UsageAllowed = IsolatedStorageContainment.AssemblyIsolationByUser)]
public sealed class App
{
    static void Main()
    {
        WriteIsolatedStorage();
    }
    private static void WriteIsolatedStorage()
    {
        // Attempt to create a storage file that is isolated by user and assembly.
        // IsolatedStorageFilePermission granted to the attribute at the top of this file
        // allows CLR to load this assembly and execution of this statement.
        using (Stream s = new IsolatedStorageFileStream("AssemblyData", FileMode.Create, IsolatedStorageFile.GetUserStoreForAssembly()))
        {

            // Write some data out to the isolated file.
            using (StreamWriter sw = new StreamWriter(s))
            {
                sw.Write("This is some test data.");
            }
        }

        // Attempt to open the file that was previously created.
        using (Stream s = new IsolatedStorageFileStream("AssemblyData", FileMode.Open, IsolatedStorageFile.GetUserStoreForAssembly()))
        {
            // Read the data from the file and display it.
            using (StreamReader sr = new StreamReader(s))
            {
                Console.WriteLine(sr.ReadLine());
            }
        }
    }
}

// This code produces the following output.
//
//  Some test data.

Option Strict On
Imports System.Security.Permissions
Imports System.IO.IsolatedStorage
Imports System.IO


' Notify the CLR to only grant IsolatedStorageFilePermission to called methods. 
' This restricts the called methods to working only with storage files that are isolated 
' by user and assembly.
<IsolatedStorageFilePermission(SecurityAction.PermitOnly, UsageAllowed:=IsolatedStorageContainment.AssemblyIsolationByUser)> _
Public NotInheritable Class App

    Shared Sub Main()
        WriteIsolatedStorage()
    End Sub
    Shared Sub WriteIsolatedStorage()
        ' Attempt to create a storage file that is isolated by user and assembly.
        ' IsolatedStorageFilePermission granted to the attribute at the top of this file 
        ' allows CLR to load this assembly and execution of this statement.
        Dim s As New IsolatedStorageFileStream("AssemblyData", FileMode.Create, IsolatedStorageFile.GetUserStoreForAssembly())
        Try

            ' Write some data out to the isolated file.
            Dim sw As New StreamWriter(s)
            Try
                sw.Write("This is some test data.")
            Finally
                sw.Dispose()
            End Try
        Finally
            s.Dispose()
        End Try

        ' Attempt to open the file that was previously created.
        Dim t As New IsolatedStorageFileStream("AssemblyData", FileMode.Open, IsolatedStorageFile.GetUserStoreForAssembly())
        Try
            ' Read the data from the file and display it.
            Dim sr As New StreamReader(t)
            Try
                Console.WriteLine(sr.ReadLine())
            Finally
                sr.Dispose()
            End Try
        Finally
            t.Dispose()
        End Try

    End Sub
End Class

' This code produces the following output.
'
'  Some test data.

Commenti

La tabella seguente descrive il tempo in cui ogni azione di sicurezza viene eseguita e le destinazioni supportate.

Non è consigliabile usare LinkDemand .NET Framework 4. Usare invece per limitare l'utilizzo SecurityCriticalAttribute a applicazioni completamente attendibili o usare Demand per limitare i chiamanti parzialmente attendibili.

Per altre informazioni sulle destinazioni degli attributi, vedere Attribute.

Si applica a