ObjectHandle ObjectHandle ObjectHandle ObjectHandle Class

Definizione

Esegue il wrapping di riferimenti a oggetti marshalling per valore, consentendone la restituzione tramite un riferimento indiretto.Wraps marshal-by-value object references, allowing them to be returned through an indirection.

public ref class ObjectHandle : MarshalByRefObject, System::Runtime::Remoting::IObjectHandle
[System.Runtime.InteropServices.ClassInterface(System.Runtime.InteropServices.ClassInterfaceType.AutoDual)]
[System.Runtime.InteropServices.ComVisible(true)]
public class ObjectHandle : MarshalByRefObject, System.Runtime.Remoting.IObjectHandle
type ObjectHandle = class
    inherit MarshalByRefObject
    interface IObjectHandle
Public Class ObjectHandle
Inherits MarshalByRefObject
Implements IObjectHandle
Ereditarietà
Attributi
Implementazioni

Esempi

Nell'esempio di codice seguente viene illustrato come creare un oggetto in AppDomainun altro e come recuperare un proxy per l'oggetto ObjectHandleda un oggetto.The following code example shows how to create an object in another AppDomain, and retrieve a proxy to the object from a ObjectHandle. In questo esempio, si può presupporre che il codice della MyType classe venga compilato in un assembly denominato "ObjectHandleAssembly".In this example, you can assume that the code of the MyType class is compiled into an assembly called "ObjectHandleAssembly".

using namespace System;
using namespace System::Runtime::Remoting;
public ref class MyType: public MarshalByRefObject
{
public:
   MyType()
   {
      Console::Write( "Created an instance of MyType in an AppDomain with the " );
      Console::WriteLine( "hash code {0}", AppDomain::CurrentDomain->GetHashCode() );
      Console::WriteLine( "" );
   }

   int GetAppDomainHashCode()
   {
      return AppDomain::CurrentDomain->GetHashCode();
   }

};

int main()
{
   Console::WriteLine( "The hash code of the default AppDomain is {0}.", AppDomain::CurrentDomain->GetHashCode() );
   Console::WriteLine( "" );
   
   // Creates another AppDomain.
   AppDomain^ domain = AppDomain::CreateDomain( "AnotherDomain", nullptr, (AppDomainSetup^)nullptr );
   
   // Creates an instance of MyType defined in the assembly called ObjectHandleAssembly.
   ObjectHandle^ obj = domain->CreateInstance( "ObjectHandleAssembly", "MyType" );
   
   // Unwraps the proxy to the MyType object created in the other AppDomain.
   MyType^ testObj = dynamic_cast<MyType^>(obj->Unwrap());
   if ( RemotingServices::IsTransparentProxy( testObj ) )
      Console::WriteLine( "The unwrapped object is a proxy." );
   else
      Console::WriteLine( "The unwrapped object is not a proxy!" );

   Console::WriteLine( "" );
   Console::Write( "Calling a method on the object located in an AppDomain with the hash code " );
   Console::WriteLine( testObj->GetAppDomainHashCode() );
   
}

using System;
using System.Runtime.Remoting;


public class MyType : MarshalByRefObject {

   public MyType()  {
      Console.Write("Created an instance of MyType in an AppDomain with the ");
      Console.WriteLine("hash code {0}",AppDomain.CurrentDomain.GetHashCode());
      Console.WriteLine("");
   }

   public int GetAppDomainHashCode() {
      return AppDomain.CurrentDomain.GetHashCode();
   }
}


class Test {

   public static void Main() {

      Console.WriteLine("The hash code of the default AppDomain is {0}.", 
                        AppDomain.CurrentDomain.GetHashCode());
      Console.WriteLine("");

      // Creates another AppDomain.
      AppDomain domain = AppDomain.CreateDomain("AnotherDomain", 
                                                null, 
                                                (AppDomainSetup)null);

      // Creates an instance of MyType defined in the assembly called ObjectHandleAssembly.
      ObjectHandle obj = domain.CreateInstance("ObjectHandleAssembly", "MyType");

      // Unwrapps the proxy to the MyType object created in the other AppDomain.
      MyType testObj = (MyType)obj.Unwrap();

      if(RemotingServices.IsTransparentProxy(testObj))
         Console.WriteLine("The unwrapped object is a proxy.");
      else
         Console.WriteLine("The unwrapped object is not a proxy!");    

      Console.WriteLine("");
      Console.Write("Calling a method on the object located in an AppDomain with the hash code ");
      Console.WriteLine(testObj.GetAppDomainHashCode());
   }
}
Imports System.Runtime.Remoting


Public Class MyType
   Inherits MarshalByRefObject
      
   Public Sub New()
      Console.Write("Created an instance of MyType in an AppDomain with the ")
      Console.WriteLine("hashcode {0}", AppDomain.CurrentDomain.GetHashCode())
      Console.WriteLine("")
   End Sub
   
   
   Public Function GetAppDomainHashCode() As Integer
      Return AppDomain.CurrentDomain.GetHashCode()
   End Function 'GetAppDomainHashCode

End Class 'MyType


Class Test
     
   Public Shared Sub Main()
      
      Console.WriteLine("The hash code of the default AppDomain is {0}.", AppDomain.CurrentDomain.GetHashCode())
      Console.WriteLine("")
      
      ' Creates another AppDomain.
      Dim domain As AppDomain = AppDomain.CreateDomain("AnotherDomain", Nothing, CType(Nothing, AppDomainSetup))
      
      ' Creates an instance of MyType defined in the assembly called ObjectHandleAssembly.
      Dim obj As ObjectHandle = domain.CreateInstance("ObjectHandleAssembly", "MyType")
      
      ' Unwrapps the proxy to the MyType object created in the other AppDomain.
      Dim testObj As MyType = CType(obj.Unwrap(), MyType)
      
      If RemotingServices.IsTransparentProxy(testObj) Then
         Console.WriteLine("The unwrapped object is a proxy.")
      Else
         Console.WriteLine("The unwrapped object is not a proxy!")
      End If 
      Console.WriteLine("")
      Console.Write("Calling a method on the object located in an AppDomain with the hash code ")
      Console.WriteLine(testObj.GetAppDomainHashCode())

   End Sub

End Class 'Test 

Commenti

La ObjectHandle classe viene utilizzata per passare un oggetto (in uno stato di cui è stato eseguito il Wrapped) tra più domini applicazione senza caricare i metadati AppDomain per l'oggetto ObjectHandle di cui è stato eseguito il wrapped in ogni oggetto attraverso il quale si spostaThe ObjectHandle class is used to pass an object (in a wrapped state) between multiple application domains without loading the metadata for the wrapped object in each AppDomain through which the ObjectHandle travels. Quindi, la ObjectHandle classe fornisce al chiamante il controllo di quando Type l'oggetto remoto viene caricato in un dominio.Thus, the ObjectHandle class gives the caller control of when the Type of the remote object is loaded into a domain.

Costruttori

ObjectHandle(Object) ObjectHandle(Object) ObjectHandle(Object) ObjectHandle(Object)

Inizializza un'istanza della classe ObjectHandle, eseguendo il wrapping dell'oggetto o dato.Initializes an instance of the ObjectHandle class, wrapping the given object o.

Metodi

CreateObjRef(Type) CreateObjRef(Type) CreateObjRef(Type) CreateObjRef(Type)

Consente di creare un oggetto che contiene tutte le informazioni rilevanti necessarie per la generazione del proxy utilizzato per effettuare la comunicazione con un oggetto remoto.Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object.

(Inherited from MarshalByRefObject)
Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina se l'oggetto specificato è uguale all'oggetto corrente.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Funge da funzione hash predefinita.Serves as the default hash function.

(Inherited from Object)
GetLifetimeService() GetLifetimeService() GetLifetimeService() GetLifetimeService()

Consente di recuperare l'oggetto servizio di durata corrente per controllare i criteri di durata per l'istanza.Retrieves the current lifetime service object that controls the lifetime policy for this instance.

(Inherited from MarshalByRefObject)
GetType() GetType() GetType() GetType()

Ottiene l'oggetto Type dell'istanza corrente.Gets the Type of the current instance.

(Inherited from Object)
InitializeLifetimeService() InitializeLifetimeService() InitializeLifetimeService() InitializeLifetimeService()

Inizializza il lease di durata dell'oggetto di cui è stato eseguito il wrapping.Initializes the lifetime lease of the wrapped object.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficiale dell'oggetto Object corrente.Creates a shallow copy of the current Object.

(Inherited from Object)
MemberwiseClone(Boolean) MemberwiseClone(Boolean) MemberwiseClone(Boolean) MemberwiseClone(Boolean)

Crea una copia dei riferimenti dell'oggetto MarshalByRefObject corrente.Creates a shallow copy of the current MarshalByRefObject object.

(Inherited from MarshalByRefObject)
ToString() ToString() ToString() ToString()

Restituisce una stringa che rappresenta l'oggetto corrente.Returns a string that represents the current object.

(Inherited from Object)
Unwrap() Unwrap() Unwrap() Unwrap()

Restituisce l'oggetto di cui è stato eseguito il wrapping.Returns the wrapped object.

Si applica a