ReceiveCompletedEventHandler ReceiveCompletedEventHandler ReceiveCompletedEventHandler ReceiveCompletedEventHandler Delegate

Определение

Представляет метод, обрабатывающий событие ReceiveCompleted объекта MessageQueue.Represents the method that will handle the ReceiveCompleted event of a MessageQueue.

public delegate void ReceiveCompletedEventHandler(System::Object ^ sender, ReceiveCompletedEventArgs ^ e);
[System.Serializable]
public delegate void ReceiveCompletedEventHandler(object sender, ReceiveCompletedEventArgs e);
type ReceiveCompletedEventHandler = delegate of obj * ReceiveCompletedEventArgs -> unit
Public Delegate Sub ReceiveCompletedEventHandler(sender As Object, e As ReceiveCompletedEventArgs)

Параметры

sender
Object Object Object Object

Источник события, MessageQueue.The source of the event, the MessageQueue.

e
ReceiveCompletedEventArgs ReceiveCompletedEventArgs ReceiveCompletedEventArgs ReceiveCompletedEventArgs

Объект ReceiveCompletedEventArgs, содержащий данные события.A ReceiveCompletedEventArgs that contains the event data.

Наследование
ReceiveCompletedEventHandlerReceiveCompletedEventHandlerReceiveCompletedEventHandlerReceiveCompletedEventHandler
Атрибуты

Примеры

В следующем примере кода показано, как создать делегат события (ReceiveCompletedEventHandler) для обработчика событий (MyReceiveCompleted) MessageQueue.ReceiveCompleted и связать его с событием.The following code example illustrates how to create an event delegate (ReceiveCompletedEventHandler) for the event handler (MyReceiveCompleted) and associate it with the MessageQueue.ReceiveCompleted event. Обработчик событий получает сообщение из очереди и записывает его метку на экран.The event handler receives a message from a queue, and writes its label to the screen.

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

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

   //*************************************************
   // Provides an event handler for the ReceiveCompleted
   // event.
   //*************************************************
   static void MyReceiveCompleted( Object^ source, ReceiveCompletedEventArgs^ asyncResult )
   {
      // Connect to the queue.
      MessageQueue^ mq = dynamic_cast<MessageQueue^>(source);

      // End the asynchronous Receive operation.
      Message^ m = mq->EndReceive( asyncResult->AsyncResult );

      // Display message information on the screen.
      Console::WriteLine( "Message: {0}", m->Body );

      // Restart the asynchronous Receive operation.
      mq->BeginReceive();
      return;
   }
};


//*************************************************
// Provides an entry point into the application.
//         
// This example performs asynchronous receive operation
// processing.
//*************************************************
int main()
{
   // Create an instance of MessageQueue. Set its formatter.
   MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
   array<Type^>^p = gcnew array<Type^>(1);
   p[ 0 ] = String::typeid;
   myQueue->Formatter = gcnew XmlMessageFormatter( p );

   // Add an event handler for the ReceiveCompleted event.
   myQueue->ReceiveCompleted += gcnew ReceiveCompletedEventHandler( MyNewQueue::MyReceiveCompleted );

   // Begin the asynchronous receive operation.
   myQueue->BeginReceive();

   // Do other work on the current thread.
   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 performs asynchronous receive operation
		// processing.
		//**************************************************

		public static void Main()
		{
			// Create an instance of MessageQueue. Set its formatter.
			MessageQueue myQueue = new MessageQueue(".\\myQueue");
			myQueue.Formatter = new XmlMessageFormatter(new Type[]
				{typeof(String)});

			// Add an event handler for the ReceiveCompleted event.
			myQueue.ReceiveCompleted += new 
				ReceiveCompletedEventHandler(MyReceiveCompleted);
			
			// Begin the asynchronous receive operation.
			myQueue.BeginReceive();
			
			// Do other work on the current thread.

			return;
		}


		//**************************************************
		// Provides an event handler for the ReceiveCompleted
		// event.
		//**************************************************
		
		private static void MyReceiveCompleted(Object source, 
			ReceiveCompletedEventArgs asyncResult)
		{
			// Connect to the queue.
			MessageQueue mq = (MessageQueue)source;

			// End the asynchronous Receive operation.
			Message m = mq.EndReceive(asyncResult.AsyncResult);

			// Display message information on the screen.
			Console.WriteLine("Message: " + (string)m.Body);

			// Restart the asynchronous Receive operation.
			mq.BeginReceive();
			
			return; 
		}
	}
}
Imports System.Messaging

Public Class MyNewQueue


        '
        ' Provides an entry point into the application.
        '		 
        ' This example performs asynchronous receive operation
        ' processing.
        '

        Public Shared Sub Main()

            ' Create an instance of MessageQueue. Set its formatter.
            Dim myQueue As New MessageQueue(".\myQueue")
            myQueue.Formatter = New XmlMessageFormatter(New Type() _
                {GetType([String])})

            ' Add an event handler for the ReceiveCompleted event.
            AddHandler myQueue.ReceiveCompleted, AddressOf _
                MyReceiveCompleted

            ' Begin the asynchronous receive operation.
            myQueue.BeginReceive()

            ' Do other work on the current thread.

            Return

        End Sub


        '
        ' Provides an event handler for the ReceiveCompleted
        ' event.
        '

        Private Shared Sub MyReceiveCompleted(ByVal [source] As _
            [Object], ByVal asyncResult As ReceiveCompletedEventArgs)

            ' Connect to the queue.
            Dim mq As MessageQueue = CType([source], MessageQueue)

            ' End the asynchronous Receive operation.
            Dim m As Message = mq.EndReceive(asyncResult.AsyncResult)

            ' Display message information on the screen.
            Console.WriteLine(("Message: " + CStr(m.Body)))

            ' Restart the asynchronous Receive operation.
            mq.BeginReceive()

            Return

        End Sub

End Class 'MyNewQueue

Комментарии

При создании делегата ReceiveCompletedEventHandler необходимо указать метод, обрабатывающий событие.When you create a ReceiveCompletedEventHandler delegate, you identify the method that will handle the event. Чтобы связать событие с обработчиком событий, нужно добавить в событие экземпляр делегата.To associate the event with your event handler, add an instance of the delegate to the event. Обработчик событий вызывается всякий раз, когда происходит событие, если делегат не удален.The event handler is called whenever the event occurs, unless you remove the delegate. Дополнительные сведения о делегатах обработчиков событий см. в разделе обработка и вызов событий.For more information about event-handler delegates, see Handling and Raising Events.

Методы расширения

GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate) GetMethodInfo(Delegate)

Получает объект, представляющий метод, представленный указанным делегатом.Gets an object that represents the method represented by the specified delegate.

Применяется к

Дополнительно