ProxyAttribute 建構函式

定義

命名空間:

System.Runtime.Remoting.Proxies

組件:

mscorlib.dll

使用預設值，初始化 ProxyAttribute 類別的新執行個體。

public:
 ProxyAttribute();

public ProxyAttribute ();

Public Sub New ()

範例

[AttributeUsageAttribute(AttributeTargets::Class)]
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::LinkDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
[System::Security::Permissions::SecurityPermissionAttribute
(System::Security::Permissions::SecurityAction::InheritanceDemand,
Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
public ref class MyProxyAttribute: public ProxyAttribute
{
public:
   MyProxyAttribute(){}

   // Create an instance of ServicedComponentProxy
   virtual MarshalByRefObject^ CreateInstance( Type^ serverType ) override
   {
      return ProxyAttribute::CreateInstance( serverType );
   }

   virtual RealProxy^ CreateProxy( ObjRef^ objRef1, Type^ serverType, Object^ serverObject, Context^ serverContext ) override
   {
      MyProxy^ myCustomProxy = gcnew MyProxy( serverType );
      if ( serverContext != nullptr )
      {
         RealProxy::SetStubData( myCustomProxy, serverContext );
      }

      if ( ( !serverType->IsMarshalByRef) && (serverContext == nullptr) )
      {
         throw gcnew RemotingException( "Bad Type for CreateProxy" );
      }

      return myCustomProxy;
   }
};

[MyProxyAttribute]
ref class CustomServer: public ContextBoundObject
{
public:
   CustomServer()
   {
      Console::WriteLine( "CustomServer Base Class constructor called" );
   }

   void HelloMethod( String^ str )
   {
      Console::WriteLine( "HelloMethod of Server is invoked with message : {0}", str );
   }
};

[AttributeUsage(AttributeTargets.Class)]
public class MyProxyAttribute : ProxyAttribute
{
   public MyProxyAttribute()
   {
   }
   // Create an instance of ServicedComponentProxy
   public override MarshalByRefObject CreateInstance(Type serverType)
   {
      return base.CreateInstance(serverType);
   }
   public override RealProxy CreateProxy(ObjRef objRef1,
      Type serverType,
      object serverObject,
      Context serverContext)
   {
      MyProxy myCustomProxy = new MyProxy(serverType);
      if(serverContext != null)
      {
         RealProxy.SetStubData(myCustomProxy,serverContext);
      }
      if((!serverType.IsMarshalByRef)&&(serverContext == null))
      {
         throw new RemotingException("Bad Type for CreateProxy");
      }
      return myCustomProxy;
   }
}
[MyProxyAttribute]
public class CustomServer :ContextBoundObject
{
   public CustomServer()
   {
      Console.WriteLine("CustomServer Base Class constructor called");
   }
   public void HelloMethod(string str)
   {
      Console.WriteLine("HelloMethod of Server is invoked with message : " + str);
   }
}

<SecurityPermissionAttribute(SecurityAction.Demand, Flags := SecurityPermissionFlag.Infrastructure), _
AttributeUsage(AttributeTargets.Class)>  _
Public Class MyProxyAttribute
   Inherits ProxyAttribute

   Public Sub New()
   End Sub

   ' Create an instance of ServicedComponentProxy
   Public Overrides Function CreateInstance(serverType As Type) As MarshalByRefObject
      Return MyBase.CreateInstance(serverType)
   End Function 'CreateInstance

   Public Overrides Function CreateProxy(objRef1 As ObjRef, serverType As Type, _
               serverObject As Object, serverContext As Context) As RealProxy
      Dim myCustomProxy As New MyProxy(serverType)
      If Not (serverContext Is Nothing) Then
         RealProxy.SetStubData(myCustomProxy, serverContext)
      End If
      If Not serverType.IsMarshalByRef And serverContext Is Nothing Then
         Throw New RemotingException("Bad Type for CreateProxy")
      End If
      Return myCustomProxy
   End Function 'CreateProxy
End Class

<MyProxyAttribute()> _
Public Class CustomServer
   Inherits ContextBoundObject

   Public Sub New()
      Console.WriteLine("CustomServer Base Class constructor called")
   End Sub

   Public Sub HelloMethod(str As String)
      Console.WriteLine("HelloMethod of Server is invoked with message : " + str)
   End Sub
End Class