UrlAttribute Classe

Definizione

public ref class UrlAttribute sealed : System::Runtime::Remoting::Contexts::ContextAttribute

[System.Serializable]
public sealed class UrlAttribute : System.Runtime.Remoting.Contexts.ContextAttribute

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class UrlAttribute : System.Runtime.Remoting.Contexts.ContextAttribute

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Security.SecurityCritical]
public sealed class UrlAttribute : System.Runtime.Remoting.Contexts.ContextAttribute

[<System.Serializable>]
type UrlAttribute = class
    inherit ContextAttribute

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type UrlAttribute = class
    inherit ContextAttribute

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Security.SecurityCritical>]
type UrlAttribute = class
    inherit ContextAttribute

Public NotInheritable Class UrlAttribute
Inherits ContextAttribute

Ereditarietà

Object

Attribute

ContextAttribute

UrlAttribute

Attributi

SerializableAttribute ComVisibleAttribute SecurityCriticalAttribute

Esempio

Nell'esempio di codice seguente viene illustrato l'uso dell'oggetto UrlAttribute nella configurazione della comunicazione remota attivata dal client. L'esempio contiene tre parti: un client, un server e un oggetto remoto usato dal client e dal server.

Nell'esempio di codice seguente viene illustrato un client:

#using <System.Runtime.Remoting.dll>
#using <System.dll>
#using "RemoteObject.dll"

using namespace System;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Activation;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Tcp;

[STAThread]
int main()
{
   
   // Report initial status.
   Console::WriteLine( "Client starting." );
   
   // Register TCP channel.
   ChannelServices::RegisterChannel( gcnew TcpChannel );
   
   // Create UrlAttribute.
   UrlAttribute^ attribute = gcnew UrlAttribute( "tcp://localhost:1234/RemoteApp" );
   Console::WriteLine( "UrlAttribute value: {0}", attribute->UrlValue );
   
   array<Object^>^activationAttributes = {attribute};
   
   // Use UrlAttribute to register for client activated remote object.
   RemotingConfiguration::RegisterActivatedClientType( RemoteObject::typeid, "tcp://localhost:1234/RemoteApp" );
   
   // Activate remote object.
   Console::WriteLine( "Activating remote object." );
   RemoteObject ^ obj = dynamic_cast<RemoteObject^>(Activator::CreateInstance( RemoteObject::typeid, nullptr, activationAttributes ));
   
   // Invoke a method on it.
   Console::WriteLine( "Invoking Hello() on remote object." );
   obj->Hello();
   
   // Inform user of termination.
   Console::WriteLine( "Terminating client." );
}

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Activation;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;

public class Client
{
    [STAThread]
    public static void Main()
    {
        // Report the initial status.
        Console.WriteLine("Starting client.");

        // Register the TCP channel.
        ChannelServices.RegisterChannel(new TcpChannel());

        // Create a url attribute object.
        UrlAttribute attribute =
            new UrlAttribute("tcp://localhost:1234/RemoteApp");
        Console.WriteLine("UrlAttribute value: {0}", attribute.UrlValue);
        object[] activationAttributes = new object[] { attribute };

        // Register the client for the remote object.
        RemotingConfiguration.RegisterActivatedClientType(
            typeof(RemoteObject),
            "tcp://localhost:1234/RemoteApp");

        // Activate the remote object.
        Console.WriteLine("Activating remote object.");
        RemoteObject obj = (RemoteObject) Activator.CreateInstance(
            typeof(RemoteObject), null, activationAttributes);

        // Invoke a method on the remote object.
        Console.WriteLine("Invoking Hello() on remote object.");
        obj.Hello();

        // Inform the user that the program is exiting.
        Console.WriteLine("The client is exiting.");
    }
}

Nell'esempio di codice seguente viene illustrato un server per questo client:

#using <System.Runtime.Remoting.dll>
#using <System.dll>
#using "RemoteObject.dll"

using namespace System;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Tcp;

[STAThread]
int main()
{
   
   // Report status to user.
   Console::WriteLine( "Server starting." );
   
   // Register the TCP channel.
   ChannelServices::RegisterChannel( gcnew TcpChannel( 1234 ) );
   
   // Set application name.
   RemotingConfiguration::ApplicationName = "RemoteApp";
   
   // Register object for client activated remoting.
   RemotingConfiguration::RegisterActivatedServiceType( RemoteObject::typeid );
   
   // Wait until termination.
   Console::WriteLine( "Press enter to end." );
   Console::ReadLine();
   Console::WriteLine( "Terminating server." );
}

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Tcp;

public class Server
{
    [STAThread]
    public static void Main()
    {
        // Report the status to the user.
        Console.WriteLine("Starting server.");

        // Register the TCP channel.
        ChannelServices.RegisterChannel(new TcpChannel(1234));

        // Set the application name.
        RemotingConfiguration.ApplicationName = "RemoteApp";

        // Register the object for remoting.
        RemotingConfiguration.RegisterActivatedServiceType(
            typeof(RemoteObject));

        // Wait until the user presses ENTER.
        Console.WriteLine("Press ENTER to exit.");
        Console.ReadLine();
        Console.WriteLine("The server is exiting.");
    }
}

Nell'esempio di codice seguente viene illustrato l'oggetto remoto usato dal client e dal server:

using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;

[assembly:AllowPartiallyTrustedCallersAttribute];
public ref class RemoteObject: public MarshalByRefObject
{
public:
   RemoteObject()
   {
      
      // Report object construction to server's console.
      Console::WriteLine( "You have called the constructor." );
   }

   void Hello()
   {
      
      // Report method invocation to server's console.
      Console::WriteLine( "You have called Hello()." );
   }

};

using System;
using System.Security;
using System.Security.Permissions;

public class RemoteObject : MarshalByRefObject
{
    public RemoteObject()
    {
        Console.WriteLine("You have called the constructor.");
    }

    public void Hello()
    {
        Console.WriteLine("You have called Hello().");
    }
}

Commenti

L'oggetto UrlAttribute viene passato nella matrice degli attributi di attivazione come parametro a Activator.CreateInstance quando si creano oggetti attivati con il CreateInstance metodo .

Per altre informazioni sull'uso degli attributi, vedere Attributi.

Costruttori

Campi

Proprietà

Metodi

Implementazioni dell'interfaccia esplicita

Si applica a

Vedi anche

• ContextAttribute
• IContextProperty