RemotingServices.IsOneWay(MethodBase) Method

Reference

Definition

Namespace:: System.Runtime.Remoting

Assembly:: mscorlib.dll

Important

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Returns a Boolean value that indicates whether the client that called the method specified in the given message is waiting for the server to finish processing the method before continuing execution.

public:
 static bool IsOneWay(System::Reflection::MethodBase ^ method);

public static bool IsOneWay (System.Reflection.MethodBase method);

[System.Security.SecurityCritical]
public static bool IsOneWay (System.Reflection.MethodBase method);

static member IsOneWay : System.Reflection.MethodBase -> bool

[<System.Security.SecurityCritical>]
static member IsOneWay : System.Reflection.MethodBase -> bool

Public Shared Function IsOneWay (method As MethodBase) As Boolean

Parameters

method: MethodBase

The method in question.

Returns

Boolean

true if the method is one way; otherwise, false.

Attributes: SecurityCriticalAttribute

Exceptions

SecurityException

The immediate caller does not have infrastructure permission.

Examples

public ref class HelloServer: public MarshalByRefObject
{
public:
   HelloServer()
   {
      Console::WriteLine( "HelloServer activated." );
   }

   [OneWay]
   void SayHelloToServer( String^ name )
   {
      Console::WriteLine( "Client invoked SayHelloToServer(\" {0}\").", name );
   }

   // IsOneWay: Note the lack of the OneWayAttribute adornment on this method.
   [SecurityPermissionAttribute(SecurityAction::Demand, Flags=SecurityPermissionFlag::Infrastructure)]   
   String^ SayHelloToServerAndWait( String^ name )
   {
      Console::WriteLine( "Client invoked SayHelloToServerAndWait(\" {0}\").", name );
      Console::WriteLine( "Client waiting for return? {0}", RemotingServices::IsOneWay( MethodBase::GetCurrentMethod() ) ? (String^)"No" : "Yes" );
      return String::Format( "Hi there, {0}.", name );
   }
};

public class HelloServer : MarshalByRefObject {

   public HelloServer() {
      Console.WriteLine("HelloServer activated.");
   }

   [OneWay()]
   public void SayHelloToServer(string name) {
      Console.WriteLine("Client invoked SayHelloToServer(\"{0}\").", name);
   }   

   // IsOneWay
   // Note the lack of the OneWayAttribute adornment on this method.
   public string SayHelloToServerAndWait(string name) {
      Console.WriteLine("Client invoked SayHelloToServerAndWait(\"{0}\").", name);

      Console.WriteLine(
         "Client waiting for return? {0}",
         RemotingServices.IsOneWay(MethodBase.GetCurrentMethod()) ? "No" : "Yes"
      );

      return "Hi there, " + name + ".";
   }
}

Public Class HelloServer
    Inherits MarshalByRefObject

    Shared Sub New()
        Console.WriteLine("HelloServer activated.")
    End Sub

    <OneWay()> Public Sub SayHelloToServer(ByVal name As String)
        Console.WriteLine("Client invoked SayHelloToServer(""{0}"").", name)
    End Sub

    'IsOneWay
    ' Note the lack of the OneWayAttribute adornment on this method.
<SecurityPermission(SecurityAction.Demand)> _
    Public Function SayHelloToServerAndWait(ByVal name As String) As String
        Console.WriteLine("Client invoked SayHelloToServerAndWait(""{0}"").", name)

        Console.WriteLine( _
            "Client waiting for return? {0}", _
            IIf(RemotingServices.IsOneWay(MethodBase.GetCurrentMethod()), "No", "Yes") _
        )

        Return "Hi there, " + name + "."
    End Function

End Class

Remarks

When a one-way method is called, the client does not wait for the server to finish processing the message. The client method returns to the application with no knowledge of whether or not the server will successfully process the message. Methods are marked as one way using the OneWayAttribute.

One-way methods cannot have a return value or any out parameters.

Applies to

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