MessageQueue.DefaultPropertiesToSend Propriedade

public:
 property System::Messaging::DefaultPropertiesToSend ^ DefaultPropertiesToSend { System::Messaging::DefaultPropertiesToSend ^ get(); void set(System::Messaging::DefaultPropertiesToSend ^ value); };

[System.ComponentModel.Browsable(false)]
[System.Messaging.MessagingDescription("MQ_DefaultPropertiesToSend")]
public System.Messaging.DefaultPropertiesToSend DefaultPropertiesToSend { get; set; }

[<System.ComponentModel.Browsable(false)>]
[<System.Messaging.MessagingDescription("MQ_DefaultPropertiesToSend")>]
member this.DefaultPropertiesToSend : System.Messaging.DefaultPropertiesToSend with get, set

Public Property DefaultPropertiesToSend As DefaultPropertiesToSend

Valor de Propriedade

A DefaultPropertiesToSend que contém os valores de propriedade padrão de Message Queuing usados quando a aplicação envia objetos que não Message sejam instâncias para a fila.

Atributos

BrowsableAttribute MessagingDescriptionAttribute

Exceções

Exemplos

O exemplo de código seguinte utiliza a prioridade de uma mensagem para determinar as propriedades padrão a enviar para a mensagem.

#using <system.dll>
#using <system.messaging.dll>

using namespace System;
using namespace System::Messaging;
ref class MyNewQueue
{
public:

   // Associates selected message property values
   // with high priority messages.
   void SendHighPriorityMessages()
   {
      
      // Connect to a message queue.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
      
      // Associate selected default property values with high
      // priority messages.
      myQueue->DefaultPropertiesToSend->Priority = MessagePriority::High;
      myQueue->DefaultPropertiesToSend->Label = "High Priority Message";
      myQueue->DefaultPropertiesToSend->Recoverable = true;
      myQueue->DefaultPropertiesToSend->TimeToReachQueue = TimeSpan(0,0,30);
      
      // Send messages using these defaults.
      myQueue->Send( "High priority message data 1." );
      myQueue->Send( "High priority message data 2." );
      myQueue->Send( "High priority message data 3." );
      return;
   }


   // Associates selected message property values
   // with normal priority messages.
   void SendNormalPriorityMessages()
   {
      
      // Connect to a message queue.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
      
      // Associate selected default property values with normal
      // priority messages.
      myQueue->DefaultPropertiesToSend->Priority = MessagePriority::Normal;
      myQueue->DefaultPropertiesToSend->Label = "Normal Priority Message";
      myQueue->DefaultPropertiesToSend->Recoverable = false;
      myQueue->DefaultPropertiesToSend->TimeToReachQueue = TimeSpan(0,2,0);
      
      // Send messages using these defaults.
      myQueue->Send( "Normal priority message data 1." );
      myQueue->Send( "Normal priority message data 2." );
      myQueue->Send( "Normal priority message data 3." );
      return;
   }

};


// Provides an entry point into the application.
// This example specifies different types of default
// properties for messages.
int main()
{
   
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;
   
   // Send normal and high priority messages.
   myNewQueue->SendNormalPriorityMessages();
   myNewQueue->SendHighPriorityMessages();
   return 0;
}

using System;
using System.Messaging;

namespace MyProject
{
    /// <summary>
    /// Provides a container class for the example.
    /// </summary>
    public class MyNewQueue
    {

        //**************************************************
        // Provides an entry point into the application.
        //		
        // This example specifies different types of default
        // properties for messages.
        //**************************************************

        public static void Main()
        {
            // Create a new instance of the class.
            MyNewQueue myNewQueue = new MyNewQueue();

            // Send normal and high priority messages.
            myNewQueue.SendNormalPriorityMessages();
            myNewQueue.SendHighPriorityMessages();
                        
            return;
        }

        //**************************************************
        // Associates selected message property values
        // with high priority messages.
        //**************************************************
        
        public void SendHighPriorityMessages()
        {

            // Connect to a message queue.
            MessageQueue myQueue = new
                MessageQueue(".\\myQueue");

            // Associate selected default property values with high
            // priority messages.
            myQueue.DefaultPropertiesToSend.Priority =
                MessagePriority.High;
            myQueue.DefaultPropertiesToSend.Label =
                "High Priority Message";
            myQueue.DefaultPropertiesToSend.Recoverable = true;
            myQueue.DefaultPropertiesToSend.TimeToReachQueue =
                new TimeSpan(0,0,30);
            
            // Send messages using these defaults.
            myQueue.Send("High priority message data 1.");
            myQueue.Send("High priority message data 2.");
            myQueue.Send("High priority message data 3.");
            
            return;
        }

        //**************************************************
        // Associates selected message property values
        // with normal priority messages.
        //**************************************************
        
        public void SendNormalPriorityMessages()
        {

            // Connect to a message queue.
            MessageQueue myQueue = new MessageQueue(".\\myQueue");

            // Associate selected default property values with normal
            // priority messages.
            myQueue.DefaultPropertiesToSend.Priority =
                MessagePriority.Normal;
            myQueue.DefaultPropertiesToSend.Label =
                "Normal Priority Message";
            myQueue.DefaultPropertiesToSend.Recoverable = false;
            myQueue.DefaultPropertiesToSend.TimeToReachQueue =
                new TimeSpan(0,2,0);
            
            // Send messages using these defaults.
            myQueue.Send("Normal priority message data 1.");
            myQueue.Send("Normal priority message data 2.");
            myQueue.Send("Normal priority message data 3.");
            
            return;
        }
    }
}

Imports System.Messaging

Public Class MyNewQueue



        ' Provides an entry point into the application.
        '		 
        ' This example specifies different types of default
        ' properties for messages.


        Public Shared Sub Main()

            ' Create a new instance of the class.
            Dim myNewQueue As New MyNewQueue()

            ' Send normal and high priority messages.
            myNewQueue.SendNormalPriorityMessages()
            myNewQueue.SendHighPriorityMessages()

            Return

        End Sub



        ' Associates selected message property values
        ' with high priority messages.
 

        Public Sub SendHighPriorityMessages()

            ' Connect to a message queue.
            Dim myQueue As New MessageQueue(".\myQueue")

            ' Associate selected default property values with high
            ' priority messages.
            myQueue.DefaultPropertiesToSend.Priority = _
                MessagePriority.High
            myQueue.DefaultPropertiesToSend.Label = _
                "High Priority Message"
            myQueue.DefaultPropertiesToSend.Recoverable = True
            myQueue.DefaultPropertiesToSend.TimeToReachQueue = _
                New TimeSpan(0, 0, 30)

            ' Send messages using these defaults.
            myQueue.Send("High priority message data 1.")
            myQueue.Send("High priority message data 2.")
            myQueue.Send("High priority message data 3.")

            Return

        End Sub



        ' Associates selected message property values
        ' with normal priority messages.

        Public Sub SendNormalPriorityMessages()

            ' Connect to a message queue.
            Dim myQueue As New MessageQueue(".\myQueue")

            ' Associate selected default property values with normal
            ' priority messages.
            myQueue.DefaultPropertiesToSend.Priority = _
                MessagePriority.Normal
            myQueue.DefaultPropertiesToSend.Label = _
                "Normal Priority Message"
            myQueue.DefaultPropertiesToSend.Recoverable = False
            myQueue.DefaultPropertiesToSend.TimeToReachQueue = _
                New TimeSpan(0, 2, 0)

            ' Send messages using these defaults.
            myQueue.Send("Normal priority message data 1.")
            myQueue.Send("Normal priority message data 2.")
            myQueue.Send("Normal priority message data 3.")

            Return

        End Sub

End Class

Observações

Quando envia qualquer objeto que não seja do tipo Message para a fila, este MessageQueue insere o objeto numa mensagem de Fila de Mensagens. Nesse momento, aplica-se MessageQueue à mensagem os valores da propriedade que especifica na DefaultPropertiesToSend propriedade. Por outro lado, se enviar a Message para a fila, estas propriedades já estão especificadas para a própria instância, pelo que DefaultPropertiesToSend é ignorado para o Message.

Embora definas as propriedades através do MessageQueue objeto, o refere-se DefaultPropertiesToSend às propriedades das mensagens enviadas para a fila, não à fila em si.

Os valores padrão das propriedades são apresentados na tabela seguinte.

A tabela seguinte mostra se esta propriedade está disponível em vários modos de Grupo de Trabalho.

Ver também

• Message
• AcknowledgeTypes
• EncryptionAlgorithm
• HashAlgorithm
• InfiniteTimeout