ObjRef Constructors

Reference

Definition

Namespace:: System.Runtime.Remoting

Assembly:: mscorlib.dll

Important

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Initializes a new instance of the ObjRef class.

Overloads

ObjRef()	Initializes a new instance of the ObjRef class with default values.
ObjRef(MarshalByRefObject, Type)	Initializes a new instance of the ObjRef class to reference a specified MarshalByRefObject of a specified Type.
ObjRef(SerializationInfo, StreamingContext)	Initializes a new instance of the ObjRef class from serialized data.

ObjRef()

Initializes a new instance of the ObjRef class with default values.

public:
 ObjRef();

public ObjRef ();

Public Sub New ()

Applies to

ObjRef(MarshalByRefObject, Type)

Initializes a new instance of the ObjRef class to reference a specified MarshalByRefObject of a specified Type.

public:
 ObjRef(MarshalByRefObject ^ o, Type ^ requestedType);

public ObjRef (MarshalByRefObject o, Type requestedType);

[System.Security.SecurityCritical]
public ObjRef (MarshalByRefObject o, Type requestedType);

new System.Runtime.Remoting.ObjRef : MarshalByRefObject * Type -> System.Runtime.Remoting.ObjRef

[<System.Security.SecurityCritical>]
new System.Runtime.Remoting.ObjRef : MarshalByRefObject * Type -> System.Runtime.Remoting.ObjRef

Public Sub New (o As MarshalByRefObject, requestedType As Type)

Parameters

o: MarshalByRefObject

The object that the new ObjRef instance will reference.

requestedType: Type

The Type of the object that the new ObjRef instance will reference.

Attributes: SecurityCriticalAttribute

Examples

// 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
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
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);
   }
}

Applies to

ObjRef(SerializationInfo, StreamingContext)

Initializes a new instance of the ObjRef class from serialized data.

protected:
 ObjRef(System::Runtime::Serialization::SerializationInfo ^ info, System::Runtime::Serialization::StreamingContext context);

protected ObjRef (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);

[System.Security.SecurityCritical]
protected ObjRef (System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context);

new System.Runtime.Remoting.ObjRef : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Runtime.Remoting.ObjRef

[<System.Security.SecurityCritical>]
new System.Runtime.Remoting.ObjRef : System.Runtime.Serialization.SerializationInfo * System.Runtime.Serialization.StreamingContext -> System.Runtime.Remoting.ObjRef

Protected Sub New (info As SerializationInfo, context As StreamingContext)

Parameters

info: SerializationInfo

The object that holds the serialized object data.

context: StreamingContext

The contextual information about the source or destination of the exception.

Attributes: SecurityCriticalAttribute

Examples

// 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
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
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);
   }
}

Remarks

This constructor is called during deserialization to reconstitute the exception object transmitted over a stream. For more information, see ISerializable.

Applies to

Megosztás a következőn keresztül:

ObjRef Constructors

Definition

Overloads

ObjRef()

Applies to

ObjRef(MarshalByRefObject, Type)

Parameters

Examples

Applies to

ObjRef(SerializationInfo, StreamingContext)

Parameters

Examples

Remarks

Applies to

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