Message.Id-Eigenschaft

Ruft die ID der Meldung ab.

Namespace: System.Messaging
Assembly: System.Messaging (in system.messaging.dll)

Syntax

'Declaration
Public ReadOnly Property Id As String
'Usage
Dim instance As Message
Dim value As String

value = instance.Id

public string Id { get; }

public:
property String^ Id {
    String^ get ();
}

/** @property */
public String get_Id ()

public function get Id () : String

Eigenschaftenwert

Die eindeutige Meldungs-ID, die von Message Queuing generiert wird.

Ausnahmen

Ausnahmetyp	Bedingung
InvalidOperationException	Die Meldung wurde nicht gesendet. Diese Eigenschaft kann nur bei Meldungen gelesen werden, die aus einer Warteschlange abgerufen wurden. - oder - Die Id-Eigenschaft wird aufgrund eines für die Meldungswarteschlange gesetzten Filters ignoriert.

Hinweise

Message Queuing generiert beim Absenden einer Meldung eine Meldungs-ID. Diese besteht aus 20 Bytes und enthält zwei Elemente: die Rechner-Guid des sendenden Computers und eine eindeutige ID für die Meldung auf dem Computer. Die Kombination beider Elemente liefert eine im Netzwerk eindeutige Meldungen-ID.

Meldungswarteschlangen generieren für alle, einschließlich Rückmeldung und Berichtmeldungen, Meldungen eine Meldungs-ID. Eine Bestätigungsmeldung wird von Message Queuing üblicherweise als Reaktion auf den Empfang oder die Unzustellbarkeit einer zuvor gesendeten Meldung gesendet. Den Wert der Id-Eigenschaft der ursprünglichen Meldung können Sie über die CorrelationId-Eigenschaft der Bestätigungsmeldung abrufen.

Sie können die Id-Eigenschaft auch beim Senden einer Antwort an eine Antwortwarteschlange verwenden. Zur Angabe der ID der ursprünglichen Meldung legen Sie die CorrelationId-Eigenschaft der Antwort auf die Id-Eigenschaft der ursprünglichen Meldung fest. Die Anwendung, die die Antwort verarbeitet, kann so die ursprüngliche Meldung über die Korrelations-ID in der Antwort identifizieren.

Beispiel

Im folgenden Codebeispiel wird eine Meldung, die eine Reihenfolge enthält, an eine Warteschlange gesendet und aus dieser empfangen. Es wird ausdrücklich eine positive Bestätigung angefordert, wenn die ursprüngliche Meldung die Warteschlange erreicht oder aus dieser abgerufen wird.

Imports System
Imports System.Messaging


' Provides a container class for the example.

Public Class MyNewQueue
   
   

   ' Provides an entry point into the application.       
   ' This example sends and receives a message from
   ' a queue.
      
   Public Shared Sub Main()
         ' Create a new instance of the class.
         Dim myNewQueue As New MyNewQueue()
         
         ' Create new queues.
         CreateQueue(".\myQueue")
         CreateQueue(".\myAdministrationQueue")
         
         ' Send messages to a queue.
         myNewQueue.SendMessage()
         
         ' Receive messages from a queue.
         Dim messageId As String = myNewQueue.ReceiveMessage()
         
         ' Receive acknowledgment message.
         If Not (messageId Is Nothing) Then
            myNewQueue.ReceiveAcknowledgment(messageId, ".\myAdministrationQueue")
         End If
         
         Return
   End Sub 'Main
      
      
      ' Creates a new queue.

   Public Shared Sub CreateQueue(queuePath As String)
         Try
            If Not MessageQueue.Exists(queuePath) Then
               MessageQueue.Create(queuePath)
            Else
               Console.WriteLine((queuePath + " already exists."))
            End If
         Catch e As MessageQueueException
            Console.WriteLine(e.Message)
         End Try
   End Sub 'CreateQueue
       
      
      
 
      ' Sends a string message to a queue.
 
   Public Sub SendMessage()
         
         ' Connect to a queue on the local computer.
         Dim myQueue As New MessageQueue(".\myQueue")
         
         ' Create a new message.
         Dim myMessage As New Message("Original Message")
         
         myMessage.AdministrationQueue = New MessageQueue(".\myAdministrationQueue")
         myMessage.AcknowledgeType = AcknowledgeTypes.PositiveReceive Or AcknowledgeTypes.PositiveArrival
         
         ' Send the Order to the queue.
         myQueue.Send(myMessage)
         
         Return
   End Sub 'SendMessage
      
      
      
 
      ' Receives a message containing an Order.
 
   Public Function ReceiveMessage() As String
         ' Connect to the a queue on the local computer.
         Dim myQueue As New MessageQueue(".\myQueue")
         
         myQueue.MessageReadPropertyFilter.CorrelationId = True
         
         
         ' Set the formatter to indicate body contains an Order.
         myQueue.Formatter = New XmlMessageFormatter(New Type() {GetType(String)})
         
         Dim returnString As String = Nothing
         
         Try
            ' Receive and format the message. 
            Dim myMessage As Message = myQueue.Receive()
            
            
            ' Display message information.
            Console.WriteLine("____________________________________________")
            Console.WriteLine("Original message information--")
            Console.WriteLine(("Body: " + myMessage.Body.ToString()))
            Console.WriteLine(("Id: " + myMessage.Id.ToString()))
            Console.WriteLine("____________________________________________")
            
            returnString = myMessage.Id
         
         
                  
         ' Handle invalid serialization format.
         Catch e As InvalidOperationException
            Console.WriteLine(e.Message)
         End Try
         
         ' Catch other exceptions as necessary.
         Return returnString
   End Function 'ReceiveMessage
      
      
 
      ' Receives a message containing an Order.
 
   Public Sub ReceiveAcknowledgment(messageId As String, queuePath As String)
         Dim found As Boolean = False
         Dim queue As New MessageQueue(queuePath)
         queue.MessageReadPropertyFilter.CorrelationId = True
         queue.MessageReadPropertyFilter.Acknowledgment = True
         
         Try
            While Not (queue.PeekByCorrelationId(messageId) Is Nothing)
               Dim myAcknowledgmentMessage As Message = queue.ReceiveByCorrelationId(messageId)
               
               ' Output acknowledgment message information. The correlation Id is identical
               ' to the id of the original message.
               Console.WriteLine("Acknowledgment Message Information--")
               Console.WriteLine(("Correlation Id: " + myAcknowledgmentMessage.CorrelationId.ToString()))
               Console.WriteLine(("Id: " + myAcknowledgmentMessage.Id.ToString()))
               Console.WriteLine(("Acknowledgment Type: " + myAcknowledgmentMessage.Acknowledgment.ToString()))
               Console.WriteLine("____________________________________________")
               
               found = True
            End While
         Catch e As InvalidOperationException
            ' This exception would be thrown if there is no (further) acknowledgment message
            ' with the specified correlation Id. Only output a message if there are no messages;
            ' not if the loop has found at least one.
            If found = False Then
               Console.WriteLine(e.Message)
            End If
         End Try 
   End Sub 'ReceiveAcknowledgment ' Handle other causes of invalid operation exception.
 End Class 'MyNewQueue

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 sends and receives a message from
        // a queue.
        //**************************************************

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

            // Create new queues.
            CreateQueue(".\\myQueue");
            CreateQueue(".\\myAdministrationQueue");

            // Send messages to a queue.
            myNewQueue.SendMessage();

            // Receive messages from a queue.
            string messageId = myNewQueue.ReceiveMessage(); 

            // Receive acknowledgment message.
            if(messageId != null)
            {
                myNewQueue.ReceiveAcknowledgment(messageId, ".\\myAdministrationQueue");
            }

            return;
        }

        //**************************************************
        // Creates a new queue.
        //**************************************************

        public static void CreateQueue(string queuePath)
        {
            try 
            {
                if(!MessageQueue.Exists(queuePath))
                {
                    MessageQueue.Create(queuePath);
                }
                else
                {
                    Console.WriteLine(queuePath + " already exists.");
                }
            }
            catch (MessageQueueException e)
            {
                Console.WriteLine(e.Message);
            }
            
        }


        //**************************************************
        // Sends a string message to a queue.
        //**************************************************
        
        public void SendMessage()
        {

            // Connect to a queue on the local computer.
            MessageQueue myQueue = new MessageQueue(".\\myQueue");

            // Create a new message.
            Message myMessage = new Message("Original Message"); 

            myMessage.AdministrationQueue = new MessageQueue(".\\myAdministrationQueue");
            myMessage.AcknowledgeType = AcknowledgeTypes.PositiveReceive | AcknowledgeTypes.PositiveArrival;

            // Send the Order to the queue.
            myQueue.Send(myMessage);

            return;
        }


        //**************************************************
        // Receives a message containing an Order.
        //**************************************************
        
        public  string ReceiveMessage()
        {
            // Connect to the a queue on the local computer.
            MessageQueue myQueue = new MessageQueue(".\\myQueue");

            myQueue.MessageReadPropertyFilter.CorrelationId = true;


            // Set the formatter to indicate body contains an Order.
            myQueue.Formatter = new XmlMessageFormatter(new Type[]
                {typeof(string)});

            string returnString = null;
            
            try
            {
                // Receive and format the message. 
                Message myMessage = myQueue.Receive(); 


                // Display message information.
                Console.WriteLine("____________________________________________");
                Console.WriteLine("Original message information--");
                Console.WriteLine("Body: " +myMessage.Body.ToString());
                Console.WriteLine("Id: " + myMessage.Id.ToString());
                Console.WriteLine("____________________________________________");

                returnString =  myMessage.Id;
                
            }
            
            catch (MessageQueueException)
            {
                // Handle Message Queuing exceptions.
            }

            // Handle invalid serialization format.
            catch (InvalidOperationException e)
            {
                Console.WriteLine(e.Message);
            }
            
            // Catch other exceptions as necessary.

            return returnString;
        }

        //**************************************************
        // Receives a message containing an Order.
        //**************************************************
        
        public void ReceiveAcknowledgment(string messageId, string queuePath)
        {
            bool found = false;
            MessageQueue queue = new MessageQueue(queuePath);
            queue.MessageReadPropertyFilter.CorrelationId = true;
            queue.MessageReadPropertyFilter.Acknowledgment = true;

            try
            {
                while(queue.PeekByCorrelationId(messageId) != null)
                {
                    Message myAcknowledgmentMessage = queue.ReceiveByCorrelationId(messageId);
            
                    // Output acknowledgment message information. The correlation Id is identical
                    // to the id of the original message.
                    Console.WriteLine("Acknowledgment Message Information--");
                    Console.WriteLine("Correlation Id: " + myAcknowledgmentMessage.CorrelationId.ToString());
                    Console.WriteLine("Id: " + myAcknowledgmentMessage.Id.ToString());
                    Console.WriteLine("Acknowledgment Type: " + myAcknowledgmentMessage.Acknowledgment.ToString());
                    Console.WriteLine("____________________________________________");

                    found = true;
                }
            }
            catch (InvalidOperationException e)
            { 
                // This exception would be thrown if there is no (further) acknowledgment message
                // with the specified correlation Id. Only output a message if there are no messages;
                // not if the loop has found at least one.
                if(found == false)
                {   
                    Console.WriteLine(e.Message);
                }

                // Handle other causes of invalid operation exception.
            }

        }
    }
}

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

using namespace System;
using namespace System::Messaging;
ref class MyNewQueue
{
public:
   static void CreateQueue( String^ queuePath )
   {
      try
      {
         if (  !MessageQueue::Exists( queuePath ) )
         {
            MessageQueue::Create( queuePath );
         }
         else
         {
            Console::WriteLine(  "{0} already exists.", queuePath );
         }
      }
      catch ( MessageQueueException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

   }

   void SendMessage()
   {
      // Connect to a queue on the local computer.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );

      // Create a new message.
      Message^ myMessage = gcnew Message( "Original Message" );
      myMessage->AdministrationQueue = gcnew MessageQueue( ".\\myAdministrationQueue" );
      myMessage->AcknowledgeType = (AcknowledgeTypes)(AcknowledgeTypes::PositiveReceive | AcknowledgeTypes::PositiveArrival);

      // Send the Order to the queue.
      myQueue->Send( myMessage );
      return;
   }

   String^ ReceiveMessage()
   {
      // Connect to the a queue on the local computer.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
      myQueue->MessageReadPropertyFilter->CorrelationId = true;
      array<Type^>^p = gcnew array<Type^>(1);
      p[ 0 ] = String::typeid;
      myQueue->Formatter = gcnew XmlMessageFormatter( p );
      String^ returnString = nullptr;
      try
      {
         // Receive and format the message. 
         Message^ myMessage = myQueue->Receive();

         // Display message information.
         Console::WriteLine( "____________________________________________" );
         Console::WriteLine( "Original message information--" );
         Console::WriteLine( "Body: {0}", myMessage->Body );
         Console::WriteLine( "Id: {0}", myMessage->Id );
         Console::WriteLine( "____________________________________________" );
         returnString = myMessage->Id;
      }
      catch ( MessageQueueException^ ) 
      {
         // Handle Message Queuing exceptions.
      }
      // Handle invalid serialization format.
      catch ( InvalidOperationException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

      // Catch other exceptions as necessary.
      return returnString;
   }

   void ReceiveAcknowledgment( String^ messageId, String^ queuePath )
   {
      bool found = false;
      MessageQueue^ queue = gcnew MessageQueue( queuePath );
      queue->MessageReadPropertyFilter->CorrelationId = true;
      queue->MessageReadPropertyFilter->Acknowledgment = true;
      try
      {
         while ( queue->PeekByCorrelationId( messageId ) != nullptr )
         {
            Message^ myAcknowledgmentMessage = queue->ReceiveByCorrelationId( messageId );

            // Output acknowledgment message information. The correlation Id is identical
            // to the id of the original message.
            Console::WriteLine( "Acknowledgment Message Information--" );
            Console::WriteLine( "Correlation Id: {0}", myAcknowledgmentMessage->CorrelationId );
            Console::WriteLine( "Id: {0}", myAcknowledgmentMessage->Id );
            Console::WriteLine( "Acknowledgment Type: {0}", myAcknowledgmentMessage->Acknowledgment );
            Console::WriteLine( "____________________________________________" );
            found = true;
         }
      }
      catch ( InvalidOperationException^ e ) 
      {
         // This exception would be thrown if there is no (further) acknowledgment message
         // with the specified correlation Id. Only output a message if there are no messages;
         // not if the loop has found at least one.
         if ( found == false )
         {
            Console::WriteLine( e->Message );
         }

         // Handle other causes of invalid operation exception.
      }

   }

};

int main()
{
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;

   // Create new queues.
   MyNewQueue::CreateQueue( ".\\myQueue" );
   MyNewQueue::CreateQueue( ".\\myAdministrationQueue" );

   // Send messages to a queue.
   myNewQueue->SendMessage();

   // Receive messages from a queue.
   String^ messageId = myNewQueue->ReceiveMessage();

   // Receive acknowledgment message.
   if ( messageId != nullptr )
   {
      myNewQueue->ReceiveAcknowledgment( messageId, ".\\myAdministrationQueue" );
   }

   return 0;
}

package MyProject;

import System.*;
import System.Messaging.*;

/// <summary>
/// Provides a container class for the example.
/// </summary>
public class MyNewQueue
{
    //**************************************************
    // Provides an entry point into the application.
    //         
    // This example sends and receives a message from
    // a queue.
    //**************************************************
    public static void main(String[] args)
    {
        // Create a new instance of the class.
        MyNewQueue myNewQueue = new MyNewQueue();

        // Create new queues.
        CreateQueue(".\\myQueue");
        CreateQueue(".\\myAdministrationQueue");

        // Send messages to a queue.
        myNewQueue.SendMessage();

        // Receive messages from a queue.
        String messageId = myNewQueue.ReceiveMessage();

        // Receive acknowledgment message.
        if (messageId != null) {
            myNewQueue.ReceiveAcknowledgment(messageId, 
                ".\\myAdministrationQueue");
        }
        return;
    } //main

    //**************************************************
    // Creates a new queue.
    //**************************************************
    public static void CreateQueue(String queuePath)
    {
        try {
            if (!(MessageQueue.Exists(queuePath))) {
                MessageQueue.Create(queuePath);
            }
            else {
                Console.WriteLine(queuePath + " already exists.");
            }
        }
        catch (MessageQueueException e) {
            Console.WriteLine(e.get_Message());
        }
    } //CreateQueue

    //**************************************************
    // Sends a string message to a queue.
    //**************************************************
    public void SendMessage()
    {
        // Connect to a queue on the local computer.
        MessageQueue myQueue = new MessageQueue(".\\myQueue");

        // Create a new message.
        Message myMessage = new Message("Original Message");
        myMessage.set_AdministrationQueue(
            new MessageQueue(".\\myAdministrationQueue"));
        myMessage.set_AcknowledgeType(AcknowledgeTypes.PositiveReceive 
            | AcknowledgeTypes.PositiveArrival);

        // Send the Order to the queue.
        myQueue.Send(myMessage);
        return;
    } //SendMessage

    //**************************************************
    // Receives a message containing an Order.
    //**************************************************
    public String ReceiveMessage()
    {
        // Connect to the a queue on the local computer.
        MessageQueue myQueue = new MessageQueue(".\\myQueue");

        myQueue.get_MessageReadPropertyFilter().set_CorrelationId(true);

        // Set the formatter to indicate body contains an Order.
        myQueue.set_Formatter(new XmlMessageFormatter(
            new Type[] { String.class.ToType() }));

        String returnString = null;
        try {
            // Receive and format the message. 
            Message myMessage = myQueue.Receive();

            // Display message information.
            Console.WriteLine("____________________________________________");
            Console.WriteLine("Original message information--");
            Console.WriteLine("Body: " + myMessage.get_Body().ToString());
            Console.WriteLine("Id: " + myMessage.get_Id().ToString());
            Console.WriteLine("____________________________________________");

            returnString = myMessage.get_Id();
        }
        catch (MessageQueueException exp) {
            // Handle Message Queuing exceptions.
        }
        // Handle invalid serialization format.
        catch (InvalidOperationException e) {
            Console.WriteLine(e.get_Message());
        }
        // Catch other exceptions as necessary.
        return returnString;
    } //ReceiveMessage

    //**************************************************
    // Receives a message containing an Order.
    //**************************************************
    public void ReceiveAcknowledgment(String messageId, String queuePath)
    {
        boolean found = false;
        MessageQueue queue = new MessageQueue(queuePath);
        queue.get_MessageReadPropertyFilter().set_CorrelationId(true);
        queue.get_MessageReadPropertyFilter().set_Acknowledgment(true);
        try {
            while (queue.PeekByCorrelationId(messageId) != null) {
                Message myAcknowledgmentMessage 
                    = queue.ReceiveByCorrelationId(messageId);

                // Output acknowledgment message information. 
                // The correlation Id is identical
                // to the id of the original message.
                Console.WriteLine("Acknowledgment Message Information--");
                Console.WriteLine("Correlation Id: " 
                    + myAcknowledgmentMessage.get_CorrelationId().ToString());
                Console.WriteLine("Id: " 
                    + myAcknowledgmentMessage.get_Id().ToString());
                Console.WriteLine("Acknowledgment Type: " 
                    + myAcknowledgmentMessage.get_Acknowledgment().ToString());
                Console.WriteLine("____________________________________________");

                found = true;
            }
        }
        catch (InvalidOperationException e) {
            // This exception would be thrown if there is no (further) 
            // acknowledgment message with the specified correlation Id. 
            // Only output a message if there are no messages;
            // not if the loop has found at least one.
            if (found == false) {
                Console.WriteLine(e.get_Message());
            }
            // Handle other causes of invalid operation exception.
        }
    } //ReceiveAcknowledgment
} //MyNewQueue

.NET Framework-Sicherheit

• Volle Vertrauenswürdigkeit für den unmittelbaren Aufrufer. Dieser Member kann von nur teilweise vertrauenswürdigem Code nicht verwendet werden. Weitere Informationen finden Sie unter .

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

.NET Compact Framework

Unterstützt in: 2.0

Siehe auch

Referenz

Message-Klasse
Message-Member
System.Messaging-Namespace
Message.CorrelationId-Eigenschaft