MessageQueue.ReceiveCompleted Kejadian
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Terjadi ketika pesan telah dihapus dari antrean. Kejadian ini diajukan oleh operasi asinkron, BeginReceive().
public:
event System::Messaging::ReceiveCompletedEventHandler ^ ReceiveCompleted;[System.Messaging.MessagingDescription("MQ_ReceiveCompleted")]
public event System.Messaging.ReceiveCompletedEventHandler ReceiveCompleted;[<System.Messaging.MessagingDescription("MQ_ReceiveCompleted")>]
member this.ReceiveCompleted : System.Messaging.ReceiveCompletedEventHandler Public Custom Event ReceiveCompleted As ReceiveCompletedEventHandler Jenis Acara
- Atribut
Contoh
Contoh kode berikut membuat penanganan aktivitas bernama MyReceiveCompleted, melampirkannya ke ReceiveCompleted delegasi penanganan aktivitas, dan memanggil BeginReceive untuk memulai operasi penerimaan asinkron pada antrean yang terletak di jalur ".\myQueue". ReceiveCompleted Saat peristiwa dinaikkan, contoh menerima pesan dan menulis isinya ke layar. Contoh kemudian memanggil BeginReceive lagi untuk memulai operasi penerimaan asinkron baru.
#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
Keterangan
BeginReceive digunakan dalam pemrosesan asinkron untuk menaikkan ReceiveCompleted peristiwa saat pesan tersedia dalam antrean.
EndReceive(IAsyncResult) digunakan untuk menyelesaikan operasi yang dimulai oleh panggilan ke BeginReceive dan mengintip pesan saat ReceiveCompleted peristiwa dinaikkan.
Saat membuat ReceiveCompletedEventHandler delegasi, Anda mengidentifikasi metode yang akan menangani peristiwa. Untuk mengaitkan peristiwa dengan penanganan aktivitas Anda, tambahkan instans delegasi ke peristiwa. Penanganan aktivitas dipanggil setiap kali peristiwa terjadi, kecuali Jika Anda menghapus delegasi. Untuk informasi selengkapnya tentang delegasi penanganan aktivitas, lihat Menangani dan Meningkatkan Peristiwa.
