ObjRef.IsFromThisAppDomain メソッド

現在の ObjRef インスタンスが現在の AppDomain にあるオブジェクトを参照しているかどうかを示すブール値を返します。

Public Function IsFromThisAppDomain() As Boolean
[C#]
public bool IsFromThisAppDomain();
[C++]
public: bool IsFromThisAppDomain();
[JScript]
public function IsFromThisAppDomain() : Boolean;

戻り値

現在の ObjRef インスタンスが現在の AppDomain にあるオブジェクトを参照しているかどうかを示すブール値。

使用例

 
// 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);
   }
}

[C++] 
// a custom ObjRef class that outputs its status
public __gc class MyObjRef : public ObjRef 
{
    // only instantiate via marshaling or deserialization
private:
    MyObjRef() { }

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

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

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

public:
    Object* GetRealObject(StreamingContext context) 
    {
        if (IsFromThisAppDomain() || IsFromThisProcess()) 
        {
            Console::WriteLine(S"Returning actual Object* referenced by MyObjRef.");
            return ObjRef::GetRealObject(context);
        }
        else 
        {
            Console::WriteLine(S"Returning proxy to remote Object*.");
            return RemotingServices::Unmarshal(this);
        }
    }   

public:
    void ORDump() 
    {
        Console::WriteLine(S" --- Reporting MyObjRef Info --- ");
        Console::WriteLine(S"Reference to {0}.", TypeInfo->TypeName);
        Console::WriteLine(S"URI is {0}.", URI);

        Console::WriteLine(S"\nWriting EnvoyInfo: ");

        if (EnvoyInfo != 0) 
        {
            IMessageSink* EISinks = EnvoyInfo->EnvoySinks;

            while (EISinks != 0) 
            {
                Console::WriteLine(S"\tSink: {0}", EISinks);  
                EISinks = EISinks->NextSink;
            }
        } 
        else
            Console::WriteLine(S"\t {no sinks}");

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

        Console::WriteLine(S" ----------------------------- ");
    }
};

// a class that uses MyObjRef
public __gc class LocalObject : public MarshalByRefObject 
{
    // overriding CreateObjRef will allow us to return a custom ObjRef
public:
    ObjRef* CreateObjRef(Type* t) 
    {
        return new MyObjRef(this, t);
    }
};

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必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ

参照

ObjRef クラス | ObjRef メンバ | System.Runtime.Remoting 名前空間