ObjRef.TypeInfo ObjRef.TypeInfo ObjRef.TypeInfo ObjRef.TypeInfo Property

Définition

Obtient ou définit le IRemotingTypeInfo pour l'objet que ObjRef décrit.Gets or sets the IRemotingTypeInfo for the object that the ObjRef describes.

public:
 virtual property System::Runtime::Remoting::IRemotingTypeInfo ^ TypeInfo { System::Runtime::Remoting::IRemotingTypeInfo ^ get(); void set(System::Runtime::Remoting::IRemotingTypeInfo ^ value); };
public virtual System.Runtime.Remoting.IRemotingTypeInfo TypeInfo { get; set; }
member this.TypeInfo : System.Runtime.Remoting.IRemotingTypeInfo with get, set
Public Overridable Property TypeInfo As IRemotingTypeInfo

Valeur de propriété

Exemples

// a custom ObjRef class that outputs its status
[System::Security::Permissions::SecurityPermissionAttribute(
   System::Security::Permissions::SecurityAction::Demand,
   Flags=System::Security::Permissions::SecurityPermissionFlag::SerializationFormatter)]
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::Demand, 
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]	
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::InheritanceDemand, 
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]

public ref class MyObjRef: public ObjRef
{
private:

   // only instantiate via marshaling or deserialization
   MyObjRef(){}

public:
   MyObjRef( MarshalByRefObject^ o, Type^ t )
      : ObjRef( o, t )
   {
      Console::WriteLine( "Created MyObjRef." );
      ORDump();
   }

   MyObjRef( SerializationInfo^ i, StreamingContext c )
      : ObjRef( i, c )
   {
      Console::WriteLine( "Deserialized MyObjRef." );
   }

   virtual void GetObjectData( SerializationInfo^ s, StreamingContext c ) override
   {
      
      // After calling the base method, change the type from ObjRef to MyObjRef
      ObjRef::GetObjectData( s, c );
      s->SetType( GetType() );
      Console::WriteLine( "Serialized MyObjRef." );
   }
   
   virtual Object^ GetRealObject( StreamingContext context ) override
   {
      if ( IsFromThisAppDomain() || IsFromThisProcess() )
      {
         Console::WriteLine( "Returning actual Object* referenced by MyObjRef." );
         return ObjRef::GetRealObject( context );
      }
      else
      {
         Console::WriteLine( "Returning proxy to remote Object*." );
         return RemotingServices::Unmarshal( this );
      }
   }

   void ORDump()
   {
      Console::WriteLine( " --- Reporting MyObjRef Info --- " );
      Console::WriteLine( "Reference to {0}.", TypeInfo->TypeName );
      Console::WriteLine( "URI is {0}.", URI );
      Console::WriteLine( "\nWriting EnvoyInfo: " );
      if ( EnvoyInfo != nullptr )
      {
         IMessageSink^ EISinks = EnvoyInfo->EnvoySinks;
         while ( EISinks != nullptr )
         {
            Console::WriteLine( "\tSink: {0}", EISinks );
            EISinks = EISinks->NextSink;
         }
      }
      else
            Console::WriteLine( "\t {no sinks}" );

      Console::WriteLine( "\nWriting ChannelInfo: " );
      for ( int i = 0; i < ChannelInfo->ChannelData->Length; i++ )
         Console::WriteLine( "\tChannel: {0}", ChannelInfo->ChannelData[ i ] );
      Console::WriteLine( " ----------------------------- " );
   }
};

// a class that uses MyObjRef
public ref class LocalObject: public MarshalByRefObject
{
public:

   // overriding CreateObjRef will allow us to return a custom ObjRef
   [System::Security::Permissions::SecurityPermissionAttribute
   (System::Security::Permissions::SecurityAction::LinkDemand,
   Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
   virtual ObjRef^ CreateObjRef( Type^ t ) override
   {
      return gcnew MyObjRef( this,t );
   }
};
// a custom ObjRef class that outputs its status
[PermissionSet(SecurityAction.Demand, Name="FullTrust")]
public class MyObjRef : ObjRef {
   
   // only instantiate via marshaling or deserialization
   private MyObjRef() { }

   public MyObjRef(MarshalByRefObject o, Type t) : base(o, t) {
      Console.WriteLine("Created MyObjRef.");
      ORDump();
   }

   public MyObjRef(SerializationInfo i, StreamingContext c) : base(i, c) {
      Console.WriteLine("Deserialized MyObjRef.");
   }

   public override void GetObjectData(SerializationInfo s, StreamingContext c) {
      // After calling the base method, change the type from ObjRef to MyObjRef
      base.GetObjectData(s, c);
      s.SetType(GetType());
      Console.WriteLine("Serialized MyObjRef.");
   }

   public override Object GetRealObject(StreamingContext context) {

      if ( IsFromThisAppDomain() || IsFromThisProcess() )  {
         Console.WriteLine("Returning actual object referenced by MyObjRef.");
         return base.GetRealObject(context);
      }
      else {
         Console.WriteLine("Returning proxy to remote object.");
         return RemotingServices.Unmarshal(this);
      }
   }   

   public void ORDump() {

      Console.WriteLine(" --- Reporting MyObjRef Info --- ");
      Console.WriteLine("Reference to {0}.", TypeInfo.TypeName);
      Console.WriteLine("URI is {0}.", URI);

      Console.WriteLine("\nWriting EnvoyInfo: ");
      
      if ( EnvoyInfo != null) {

         IMessageSink EISinks = EnvoyInfo.EnvoySinks;

         while (EISinks != null) {
            Console.WriteLine("\tSink: " + EISinks.ToString());  
            EISinks = EISinks.NextSink;
         }
      }
      else
         Console.WriteLine("\t {no sinks}");

      Console.WriteLine("\nWriting ChannelInfo: ");
      for (int i = 0; i < ChannelInfo.ChannelData.Length; i++)
         Console.WriteLine ("\tChannel: {0}", ChannelInfo.ChannelData[i]);
      
      Console.WriteLine(" ----------------------------- ");
   }
}

// a class that uses MyObjRef
[PermissionSet(SecurityAction.Demand, Name="FullTrust")]
public class LocalObject : MarshalByRefObject  {

   // overriding CreateObjRef will allow us to return a custom ObjRef
   public override ObjRef CreateObjRef(Type t) {

      return new MyObjRef(this, t);
   }
}

Remarques

TypeInfocontient des informations détaillées sur le type d’objet distant représenté par le ObjRefactuel.TypeInfo contains detailed information about the type of remote object represented by the current ObjRef. La propriété actuelle contient une liste des interfaces implémentées par le type, ainsi que la hiérarchie des types.The current property contains a list of interfaces that the type implements, as well as the type hierarchy. Ces informations peuvent être utilisées pour affiner le proxy de manière incrémentielle pour s’adapter à la vue du client du type de l’objet distant.This information might be used to refine the proxy incrementally to adjust to the client's view of the remote object's type.

S’applique à