HostProtectionAttribute Classe

Definizione

Spazio dei nomi:

System.Security.Permissions

Assembly:

System.Security.Permissions.dll

Pacchetto:

System.Security.Permissions v9.0.0-preview.3.24172.9

Origine:

HostProtectionAttribute.cs

Attenzione

Code Access Security is not supported or honored by the runtime.

Consente l'uso di azioni di sicurezza dichiarativa per determinare i requisiti di sicurezza host. La classe non può essere ereditata.

public ref class HostProtectionAttribute sealed : System::Security::Permissions::CodeAccessSecurityAttribute

[System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)]
[System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public sealed class HostProtectionAttribute : System.Security.Permissions.CodeAccessSecurityAttribute

[<System.AttributeUsage(System.AttributeTargets.Assembly | System.AttributeTargets.Class | System.AttributeTargets.Constructor | System.AttributeTargets.Delegate | System.AttributeTargets.Method | System.AttributeTargets.Struct, AllowMultiple=true, Inherited=false)>]
[<System.Obsolete("Code Access Security is not supported or honored by the runtime.", DiagnosticId="SYSLIB0003", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
type HostProtectionAttribute = class
    inherit CodeAccessSecurityAttribute

Public NotInheritable Class HostProtectionAttribute
Inherits CodeAccessSecurityAttribute

Ereditarietà

Object

Attribute

SecurityAttribute

CodeAccessSecurityAttribute

HostProtectionAttribute

Attributi

AttributeUsageAttribute ObsoleteAttribute

Esempio

Nell'esempio di codice seguente viene illustrato l'uso dell'attributo HostProtectionAttribute con un'ampia gamma di HostProtectionResource valori.

#using <System.dll>
#using <System.Windows.Forms.dll>
#using <System.Drawing.dll>

using namespace System;
using namespace System::IO;
using namespace System::Threading;
using namespace System::Security;
using namespace System::Security::Policy;
using namespace System::Security::Principal;
using namespace System::Security::Permissions;
using namespace System::Diagnostics;
using namespace System::ComponentModel;
using namespace System::Windows::Forms;
using namespace System::Security::Permissions;

// The following class is an example of code that exposes external process management.
// Add the LicenseProviderAttribute to the control.

[LicenseProvider(LicFileLicenseProvider::typeid)]
public ref class MyControl: public System::Windows::Forms::Control
{
private:

   // Create a new, null license.
   License^ license;

public:
   [HostProtection(ExternalProcessMgmt=true)]
   MyControl()
   {
      license = nullptr;
      
      // Determine if a valid license can be granted.
      bool isValid = LicenseManager::IsValid( MyControl::typeid );
      Console::WriteLine( "The result of the IsValid method call is {0}", isValid );
   }

};

// If this application is run on a server that implements host protection, the HostProtection attribute  
// is applied. If the application is run on a server that is not host-protected, the attribute 
// evaporates; it is not detected and therefore not applied. HostProtection can be configured with 
// members of the HostProtectionResource enumeration to customize the protection offered. 
// The primary intent of this sample is to show situations in which the HostProtection attribute
// might be meaningfully used.  The environment required to demonstrate a particular HostProtection is
// too complex to invoke within the scope of this sample.
public ref class HostProtectionExample
{
public:
   static int Success = 100;

private:

   // Use the enumeration flags to indicate that this method exposes shared state and 
   // self-affecting process management.
   // Either of the following attribute statements can be used to set the 
   // resource flags.
   // Exit the sample when an exception is thrown.

   [HostProtection(SharedState=true,SelfAffectingProcessMgmt=true)]
   [HostProtection(Resources=HostProtectionResource::SharedState|
   HostProtectionResource::SelfAffectingProcessMgmt)]
   static void Exit( String^ Message, int Code )
   {
      Console::WriteLine( "\nFAILED: {0} {1}", Message, Code );
      Environment::ExitCode = Code;
      Environment::Exit( Code );
   }

   // Use the enumeration flags to indicate that this method exposes shared state, 
   // self-affecting process management, and self-affecting threading.
   // This method allows the user to quit the sample.

   [HostProtection(SharedState=true,SelfAffectingProcessMgmt=true,
   SelfAffectingThreading=true,UI=true)]
   static void ExecuteBreak()
   {
      Console::WriteLine( "Executing Debugger.Break." );
      Debugger::Break();
      Debugger::Log( 1, "info", "test message" );
   }

   // Use the enumeration flags to indicate that this method exposes shared state, 
   // self-affecting threading and the security infrastructure.
   // ApplyIdentity sets the current identity.

   [HostProtection(SharedState=true,SelfAffectingThreading=true,
   SecurityInfrastructure=true)]
   static int ApplyIdentity()
   {
      array<String^>^roles = {"User"};
      try
      {
         AppDomain^ mAD = AppDomain::CurrentDomain;
         GenericPrincipal^ mGenPr = gcnew GenericPrincipal( WindowsIdentity::GetCurrent(),roles );
         mAD->SetPrincipalPolicy( PrincipalPolicy::WindowsPrincipal );
         mAD->SetThreadPrincipal( mGenPr );
         return Success;
      }
      catch ( Exception^ e ) 
      {
         Exit( e->ToString(), 5 );
      }

      return 0;
   }

public:

   // The following method is started on a separate thread.
   [PermissionSet(SecurityAction::Demand, Name="FullTrust")]
   static void WatchFileEvents()
   {
      try
      {
         Console::WriteLine( "In the child thread." );
         FileSystemWatcher^ watcher = gcnew FileSystemWatcher;
         watcher->Path = "C:\\Temp";
         
         // Watch for changes in LastAccess and LastWrite times, and 
         // name changes to files or directories. 
         watcher->NotifyFilter = static_cast<NotifyFilters>(NotifyFilters::LastAccess | NotifyFilters::LastWrite | NotifyFilters::FileName | NotifyFilters::DirectoryName);
         
         // Watch only text files.
         watcher->Filter = "*.txt";
         
         // Add event handlers.
         watcher->Changed += gcnew FileSystemEventHandler( OnChanged );
         watcher->Created += gcnew FileSystemEventHandler( OnChanged );
         watcher->Deleted += gcnew FileSystemEventHandler( OnChanged );
         
         // Begin watching.
         watcher->EnableRaisingEvents = true;
         
         // Wait for the user to quit the program.
         Console::WriteLine( "Event handlers have been enabled." );
         while ( Console::Read() != 'q' )
                  ;
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( e->Message );
      }

   }


private:

   // Use the enumeration flags to indicate that this method exposes synchronization 
   //  and external threading.

   [HostProtection(Synchronization=true,ExternalThreading=true)]
   static void StartThread()
   {
      Thread^ t = gcnew Thread( gcnew ThreadStart( WatchFileEvents ) );
      
      // Start the new thread.  On a uniprocessor, the thread is not given 
      // any processor time until the main thread yields the processor.  
      t->Start();
      
      // Give the new thread a chance to execute.
      Thread::Sleep( 1000 );
   }

public:

   // Call methods that show the use of the HostProtectionResource enumeration.
   [HostProtection(Resources=HostProtectionResource::All)]
   static int Main()
   {
      try
      {
         
         // Show use of the HostProtectionResource.SharedState,
         //   HostProtectionResource.SelfAffectingThreading, and
         //   HostProtectionResource.Security enumeration values.
         ApplyIdentity();
         Directory::CreateDirectory( "C:\\Temp" );
         
         // Show use of the HostProtectionResource.Synchronization and
         //   HostProtectionResource.ExternalThreading enumeration values.
         StartThread();
         Console::WriteLine( "In the main thread." );
         Console::WriteLine( "Deleting and creating 'MyTestFile.txt'." );
         if ( File::Exists( "C:\\Temp\\MyTestFile.txt" ) )
         {
            File::Delete( "C:\\Temp\\MyTestFile.txt" );
         }
         StreamWriter^ sr = File::CreateText( "C:\\Temp\\MyTestFile.txt" );
         sr->WriteLine( "This is my file." );
         sr->Close();
         Thread::Sleep( 1000 );
         
         // Show use of the HostProtectionResource.SharedState,
         //   HostProtectionResource.SelfProcessMgmt,
         //   HostProtectionResource.SelfAffectingThreading, and
         //   HostProtectionResource.UI enumeration values.
         ExecuteBreak();
         
         // Show the use of the HostProtectionResource.ExternalProcessManagement enumeration value.
         MyControl^ myControl = gcnew MyControl;
         Console::WriteLine( "Enter 'q' to quit the sample." );
         return 100;
      }
      catch ( Exception^ e ) 
      {
         Exit( e->ToString(), 0 );
         return 0;
      }
   }

   // Define the event handlers.
   private:
   static void OnChanged( Object^ /*source*/, FileSystemEventArgs^ e )
   {
      
      // Specify whether a file is changed, created, or deleted.
      Console::WriteLine( "In the OnChanged event handler." );
      Console::WriteLine( "File: {0} {1}", e->FullPath, e->ChangeType );
   }

};

int main()
{
   return HostProtectionExample::Main();
}

using System;
using System.IO;
using System.Threading;
using System.Security;
using System.Security.Policy;
using System.Security.Principal;
using System.Security.Permissions;
using System.Diagnostics;
using System.ComponentModel;
using System.Windows.Forms;

// If this application is run on a server that implements host protection, the 
// HostProtectionAttribute attribute is applied. If the application is run on   
// a server that is not host-protected, the attribute evaporates; it is not  
// detected and therefore not applied. Host protection can be configured with  
// members of the HostProtectionResource enumeration to customize the  
// protection offered.
// The primary intent of this sample is to show situations in which the 
// HostProtectionAttribute attribute might be meaningfully used. The  
// environment required to demonstrate a particular behavior is
// too complex to invoke within the scope of this sample.

class HostProtectionExample
{
    public static int Success = 100;
    
    // Use the enumeration flags to indicate that this method exposes 
    // shared state and self-affecting process management.
    // Either of the following attribute statements can be used to set the
    // resource flags.
    [HostProtectionAttribute(SharedState = true, 
        SelfAffectingProcessMgmt = true)]
    [HostProtectionAttribute(Resources = HostProtectionResource.SharedState |
         HostProtectionResource.SelfAffectingProcessMgmt)]
    private static void Exit(string Message, int Code)
    {
        // Exit the sample when an exception is thrown.
        Console.WriteLine("\nFAILED: " + Message + " " + Code.ToString());
        Environment.ExitCode = Code;
        Environment.Exit(Code);
    }

    // Use the enumeration flags to indicate that this method exposes shared 
    // state, self-affecting process management, and self-affecting threading.
    [HostProtectionAttribute(SharedState=true, SelfAffectingProcessMgmt=true,
         SelfAffectingThreading=true, UI=true)]
    // This method allows the user to quit the sample.
    private static void ExecuteBreak()
    {
        Console.WriteLine("Executing Debugger.Break.");
        Debugger.Break();
        Debugger.Log(1,"info","test message");
    }
    
    // Use the enumeration flags to indicate that this method exposes shared 
    // state, self-affecting threading, and the security infrastructure.
    [HostProtectionAttribute(SharedState=true, SelfAffectingThreading=true,
         SecurityInfrastructure=true)]
    // ApplyIdentity sets the current identity.
    private static int ApplyIdentity()
    {
        string[] roles = {"User"};
        try
        {
            AppDomain mAD = AppDomain.CurrentDomain;
            GenericPrincipal mGenPr = 
                new GenericPrincipal(WindowsIdentity.GetCurrent(), roles);
            mAD.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
            mAD.SetThreadPrincipal(mGenPr);
            return Success;
        }
        catch (Exception e)
        {
            Exit(e.ToString(), 5);
        }
        return 0;
    }

    // The following method is started on a separate thread.
    public static void WatchFileEvents()
    {
        try
        {
            Console.WriteLine("In the child thread.");
            FileSystemWatcher watcher = new FileSystemWatcher();
            watcher.Path = "C:\\Temp";
            
            // Watch for changes in LastAccess and LastWrite times, and
            // name changes to files or directories.
            watcher.NotifyFilter = NotifyFilters.LastAccess 
                | NotifyFilters.LastWrite
                | NotifyFilters.FileName | NotifyFilters.DirectoryName;
            
            // Watch only text files.
            watcher.Filter = "*.txt";

            // Add event handlers.
            watcher.Changed += new FileSystemEventHandler(OnChanged);
            watcher.Created += new FileSystemEventHandler(OnChanged);
            watcher.Deleted += new FileSystemEventHandler(OnChanged);
            
            // Begin watching.
            watcher.EnableRaisingEvents = true;

            // Wait for the user to quit the program.
            Console.WriteLine("Event handlers have been enabled.");
            while(Console.Read()!='q');
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }
    }

    // Use the enumeration flags to indicate that this method exposes 
    // synchronization and external threading.
    [HostProtectionAttribute(Synchronization=true, ExternalThreading=true)]
    private static void StartThread()
    {
        Thread t = new Thread(new ThreadStart(WatchFileEvents));
        
        // Start the new thread. On a uniprocessor, the thread is not given
        // any processor time until the main thread yields the processor.
        t.Start();
        
        // Give the new thread a chance to execute.
        Thread.Sleep(1000);
    }

    // Call methods that show the use of the HostProtectionResource enumeration.
    [HostProtectionAttribute(Resources=HostProtectionResource.All)]
    static int Main(string [] args)
    {
        try
        {
            // Show use of the HostProtectionResource.SharedState,
            // HostProtectionResource.SelfAffectingThreading, and
            // HostProtectionResource.Security enumeration values.
            ApplyIdentity();
            Directory.CreateDirectory("C:\\Temp");
            
            // Show use of the HostProtectionResource.Synchronization and
            // HostProtectionResource.ExternalThreading enumeration values.
            StartThread();
            Console.WriteLine("In the main thread.");
            Console.WriteLine("Deleting and creating 'MyTestFile.txt'.");
            if (File.Exists("C:\\Temp\\MyTestFile.txt"))
            {
                File.Delete("C:\\Temp\\MyTestFile.txt");
            }

            StreamWriter sr = File.CreateText("C:\\Temp\\MyTestFile.txt");
            sr.WriteLine ("This is my file.");
            sr.Close();
            Thread.Sleep(1000);
            
            // Show use of the HostProtectionResource.SharedState,
            // HostProtectionResource.SelfProcessMgmt,
            // HostProtectionResource.SelfAffectingThreading, and
            // HostProtectionResource.UI enumeration values.
            ExecuteBreak();
            
            // Show the use of the 
            // HostProtectionResource.ExternalProcessManagement 
            // enumeration value.
            MyControl myControl = new MyControl ();
            Console.WriteLine ("Enter 'q' to quit the sample.");
            return 100;
        }
        catch (Exception e)
        {
            Exit(e.ToString(), 0);
            return 0;
        }
    }

    // Define the event handlers.
    private static void OnChanged(object source, FileSystemEventArgs e)
    {
        // Specify whether a file is changed, created, or deleted.
        Console.WriteLine("In the OnChanged event handler.");
        Console.WriteLine("File: " + e.FullPath + " " + e.ChangeType);
    }
}

// The following class is an example of code that exposes 
// external process management.
// Add the LicenseProviderAttribute to the control.
[LicenseProvider (typeof(LicFileLicenseProvider))]
public class MyControl : System.Windows.Forms.Control
{
    // Create a new, null license.
    private License license = null;

    [HostProtection (ExternalProcessMgmt = true)]
    public MyControl ()
    {
        // Determine if a valid license can be granted.
        bool isValid = LicenseManager.IsValid (typeof(MyControl));
        Console.WriteLine ("The result of the IsValid method call is " + 
            isValid.ToString ());
    }

    protected override void Dispose (bool disposing)
    {
        if (disposing)
        {
            if (license != null)
            {
                license.Dispose ();
                license = null;
            }
        }
    }
}

Imports System.IO
Imports System.Threading
Imports System.Security
Imports System.Security.Policy
Imports System.Security.Principal
Imports System.Security.Permissions
Imports System.Diagnostics
Imports System.ComponentModel
Imports System.Windows.Forms


' If this application is run on a server that implements host protection, the
' HostProtectionAttribute attribute is applied. If the application is run on 
' a server that is not host-protected, the attribute evaporates; it is not  
' detected and therefore not applied. Host protection can be configured with  
' members of the HostProtectionResource enumeration to customize the  
' protection offered. 
' The primary intent of this sample is to show situations in which the 
' HostProtectionAttribute attribute might be meaningfully used.  The 
' environment required to demonstrate a particular behavior is too 
' complex to invoke within the scope of this sample.

Class HostProtectionExample
    Public Shared Success As Integer = 100

    ' Use the enumeration flags to indicate that this method exposes 
    ' shared state and self-affecting process management.
    ' Either of the following attribute statements can be used to set the 
    ' resource flags.
    <HostProtectionAttribute(SharedState := True, _
        SelfAffectingProcessMgmt := True), _
        HostProtectionAttribute( _
        Resources := HostProtectionResource.SharedState Or _
        HostProtectionResource.SelfAffectingProcessMgmt)> _
    Private Shared Sub [Exit](ByVal Message As String, ByVal Code As Integer)

        ' Exit the sample when an exception is thrown.
        Console.WriteLine((ControlChars.Lf & "FAILED: " & Message & " " & _
            Code.ToString()))
        Environment.ExitCode = Code
        Environment.Exit(Code)
    End Sub

    ' Use the enumeration flags to indicate that this method exposes shared
    ' state, self-affecting process management, and self-affecting threading.
    <HostProtectionAttribute(SharedState := True, _
        SelfAffectingProcessMgmt := True, _
        SelfAffectingThreading := True, UI := True)> _
    Private Shared Sub ExecuteBreak()

        ' This method allows the user to quit the sample.
        Console.WriteLine("Executing Debugger.Break.")
        Debugger.Break()
        Debugger.Log(1, "info", "test message")
    End Sub

    ' Use the enumeration flags to indicate that this method exposes shared  
    ' state, self-affecting threading, and the security infrastructure.
    <HostProtectionAttribute(SharedState := True, _
        SelfAffectingThreading := True, _
        SecurityInfrastructure := True)> _
    Private Shared Function ApplyIdentity() As Integer

        ' ApplyIdentity sets the current identity.
        Dim roles(1) As String
        Try
            Dim mAD As AppDomain = AppDomain.CurrentDomain
            Dim mGenPr As _
                New GenericPrincipal(WindowsIdentity.GetCurrent(), roles)
            mAD.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal)
            mAD.SetThreadPrincipal(mGenPr)
            Return Success
        Catch e As Exception
            [Exit](e.ToString(), 5)
        End Try
        Return 0
    End Function 'ApplyIdentity

    ' The following method is started on a separate thread.
    Public Shared Sub WatchFileEvents()
        Try
            Console.WriteLine("In the child thread.")
            Dim watcher As New FileSystemWatcher()
            watcher.Path = "C:\Temp"

            ' Watch for changes in LastAccess and LastWrite times, and 
            ' name changes to files or directories. 
            watcher.NotifyFilter = NotifyFilters.LastAccess Or _
                NotifyFilters.LastWrite Or NotifyFilters.FileName Or _
                NotifyFilters.DirectoryName

            ' Watch only text files.
            watcher.Filter = "*.txt"

            ' Add event handlers.
            AddHandler watcher.Changed, AddressOf OnChanged
            AddHandler watcher.Created, AddressOf OnChanged
            AddHandler watcher.Deleted, AddressOf OnChanged

            ' Begin watching.
            watcher.EnableRaisingEvents = True

            ' Wait for the user to quit the program.
            Console.WriteLine("Event handlers have been enabled.")
            While Console.ReadLine() <> "q"c
            End While
        Catch e As Exception
            Console.WriteLine(e.Message)
        End Try
    End Sub

    ' Use the enumeration flags to indicate that this method exposes  
    ' synchronization and external threading.
    <HostProtectionAttribute(Synchronization := True, _
        ExternalThreading := True)> _
    Private Shared Sub StartThread()
        Dim t As New Thread(New ThreadStart(AddressOf WatchFileEvents))

        ' Start the new thread. On a uniprocessor, the thread is not given 
        ' any processor time until the main thread yields the processor.  
        t.Start()

        ' Give the new thread a chance to execute.
        Thread.Sleep(1000)
    End Sub

    ' Call methods that show the use of the HostProtectionResource enumeration.
    <HostProtectionAttribute(Resources := HostProtectionResource.All)> _
    Overloads Shared Function Main(ByVal args() As String) As Integer
        Try
            ' Show use of the HostProtectionResource.SharedState,
            ' HostProtectionResource.SelfAffectingThreading, and
            ' HostProtectionResource.Security enumeration values.
            ApplyIdentity()
            Directory.CreateDirectory("C:\Temp")

            ' Show use of the HostProtectionResource.Synchronization and
            ' HostProtectionResource.ExternalThreading enumeration values.
            StartThread()
            Console.WriteLine("In the main thread.")
            Console.WriteLine("Deleting and creating 'MyTestFile.txt'.")
            If File.Exists("C:\Temp\MyTestFile.txt") Then
                File.Delete("C:\Temp\MyTestFile.txt")
            End If

            Dim sr As StreamWriter = File.CreateText("C:\Temp\MyTestFile.txt")
            sr.WriteLine("This is my file.")
            sr.Close()
            Thread.Sleep(1000)

            ' Show use of the HostProtectionResource.SharedState, 
            ' HostProtectionResource.SelfProcessMgmt,
            ' HostProtectionResource.SelfAffectingThreading, and
            ' HostProtectionResource.UI enumeration values.
            ExecuteBreak()

            ' Show the use of the 
            ' HostProtectionResource.ExternalProcessManagement 
            ' enumeration value.
            Dim myControl As New MyControl()
            Console.WriteLine("Enter 'q' to quit the sample.")
            Return 100
        Catch e As Exception
            [Exit](e.ToString(), 0)
            Return 0
        End Try
    End Function 'Main

    ' Define the event handlers.
    Private Shared Sub OnChanged(ByVal [source] As Object, _
        ByVal e As FileSystemEventArgs)

        ' Specify whether a file is changed, created, or deleted.
        Console.WriteLine("In the OnChanged event handler.")
        Console.WriteLine(("File: " & e.FullPath & " " & _
            e.ChangeType.ToString()))
    End Sub
End Class

' The following class is an example of code that exposes 
' external process management.
' Add the LicenseProviderAttribute to the control.
<LicenseProvider(GetType(LicFileLicenseProvider))> _
Public Class MyControl
    Inherits System.Windows.Forms.Control

    ' Create a new, null license.
    Private license As License = Nothing

    <HostProtectionAttribute(ExternalProcessMgmt := True)> _
    Public Sub New()

        ' Determine if a valid license can be granted.
        Dim isValid As Boolean = LicenseManager.IsValid(GetType(MyControl))
        Console.WriteLine(("The result of the IsValid method call is " & _
            isValid.ToString()))
    End Sub

    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing Then
            If Not (license Is Nothing) Then
                license.Dispose()
                license = Nothing
            End If
        End If
    End Sub
End Class

Commenti

Attenzione

La sicurezza dall'accesso al codice è stata deprecata in tutte le versioni di .NET Framework e .NET. Le versioni recenti di .NET non rispettano le annotazioni CAS e generano errori se vengono usate API correlate a CAS. Gli sviluppatori devono cercare metodi alternativi per eseguire attività di sicurezza.

Questo attributo interessa solo le applicazioni non gestite che ospitano Common Language Runtime e implementano la protezione host, ad esempio SQL Server. Se il codice viene eseguito in un'applicazione client o in un server non protetto dall'host, l'attributo non ha alcun effetto. Non viene rilevato e quindi nemmeno applicato. Quando applicata, l'azione di sicurezza comporta la creazione di una richiesta di collegamento in base alle risorse host esposte dalla classe o dal metodo.

Importante

Lo scopo di questo attributo è quello di imporre le linee guida del modello di programmazione specifico per l'host, non il comportamento di sicurezza. Anche se per controllare la conformità ai requisiti del modello di programmazione viene usata una richiesta di collegamento, l'oggetto HostProtectionAttribute non è un'autorizzazione di sicurezza.

Se l'host non ha i requisiti del modello di programmazione, le richieste di collegamento non vengono effettuate.

Questo attributo identifica quanto segue:

• Metodi o classi non idonei per il modello di programmazione dell'host ma benigni.

• Metodi o classi non idonei per il modello di programmazione dell'host e che potrebbero portare alla destabilizzazione del codice utente gestito dal server.

• Metodi o classi non idonei per il modello di programmazione dell'host e che potrebbero portare alla destabilizzazione del processo server stesso.

Nota

Se si crea una libreria di classi che verrà chiamata da applicazioni eseguibili in un ambiente protetto dall'host, è necessario applicare questo attributo ai membri che espongono categorie di risorse HostProtectionResource. I membri della libreria di classi .NET Framework con questo attributo provocano solo il controllo del chiamante immediato. Analogamente, anche i membri della propria libreria devono determinare il controllo del relativo chiamante immediato.

Nota

Non usare il Ngen.exe (generatore di immagini native) per creare un'immagine nativa di assembly protetti da HostProtectionAttribute. In un ambiente con attendibilità totale, l'immagine viene sempre caricata, senza considerare , HostProtectionAttributee in un ambiente parzialmente attendibile l'immagine non viene caricata.

Costruttori

HostProtectionAttribute()	Obsoleti. Inizializza una nuova istanza della classe HostProtectionAttribute con i valori predefiniti.
HostProtectionAttribute(SecurityAction)	Obsoleti. Inizializza una nuova istanza della classe HostProtectionAttribute con il valore SecurityAction specificato.

Proprietà

Action	Obsoleti. Ottiene o imposta un'azione di sicurezza. (Ereditato da SecurityAttribute)
ExternalProcessMgmt	Obsoleti. Ottiene o imposta un valore che indica se viene esposta la gestione esterna del processo.
ExternalThreading	Obsoleti. Ottiene o imposta un valore che indica se viene esposto il threading esterno.
MayLeakOnAbort	Obsoleti. Ottiene o imposta un valore che indica se viene prodotta una perdita di memoria delle risorse al termine dell'operazione.
Resources	Obsoleti. Ottiene o imposta i flag che specificano categorie di funzionalità potenzialmente dannose per l'host.
SecurityInfrastructure	Obsoleti. Ottiene o imposta un valore che indica se viene esposta l'infrastruttura di sicurezza.
SelfAffectingProcessMgmt	Obsoleti. Ottiene o imposta un valore che indica se viene esposta la gestione dei processi con effetti diretti.
SelfAffectingThreading	Obsoleti. Ottiene o imposta un valore che indica se viene esposto il threading con effetti diretti.
SharedState	Obsoleti. Ottiene o imposta un valore che indica se viene esposto lo stato condiviso.
Synchronization	Obsoleti. Ottiene o imposta un valore che indica se viene esposta la sincronizzazione.
TypeId	Obsoleti. Quando è implementata in una classe derivata, ottiene un identificatore univoco della classe Attribute. (Ereditato da Attribute)
UI	Obsoleti. Ottiene o imposta un valore che indica se viene esposta l'interfaccia utente.
Unrestricted	Obsoleti. Ottiene o imposta un valore che indica se esiste una dichiarazione di autorizzazione completa, ovvero senza restrizioni, alla risorsa protetta dall’attributo. (Ereditato da SecurityAttribute)

Metodi

CreatePermission()	Obsoleti. Crea e restituisce una nuova autorizzazione di sicurezza host.
Equals(Object)	Obsoleti. Restituisce un valore che indica se questa istanza è uguale a un oggetto specificato. (Ereditato da Attribute)
GetHashCode()	Obsoleti. Restituisce il codice hash per l'istanza. (Ereditato da Attribute)
GetType()	Obsoleti. Ottiene l'oggetto Type dell'istanza corrente. (Ereditato da Object)
IsDefaultAttribute()	Obsoleti. In caso di override in una classe derivata, indica se il valore di questa istanza è il valore predefinito per la classe derivata. (Ereditato da Attribute)
Match(Object)	Obsoleti. Quando è sottoposto a override in una classe derivata, restituisce un valore che indica se questa istanza equivale a un oggetto specificato. (Ereditato da Attribute)
MemberwiseClone()	Obsoleti. Crea una copia superficiale dell'oggetto Object corrente. (Ereditato da Object)
ToString()	Obsoleti. Restituisce una stringa che rappresenta l'oggetto corrente. (Ereditato da Object)

Vedi anche

• Estensione di metadati mediante attributi
• Richieste di collegamento