MessageQueue.Formatter-Eigenschaft

Artikel
08/20/2007

Ruft das Formatierungsprogramm ab, oder legt das Formatierungsprogramm fest, das zum Serialisieren und Deserialisieren eines Objekts in bzw. aus dem Körper einer Meldung verwendet wird, die aus einer Warteschlange gelesen oder in eine Warteschlange geschrieben wird.

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

Syntax

'Declaration
Public Property Formatter As IMessageFormatter
'Usage
Dim instance As MessageQueue
Dim value As IMessageFormatter

value = instance.Formatter

instance.Formatter = value

public IMessageFormatter Formatter { get; set; }

public:
property IMessageFormatter^ Formatter {
    IMessageFormatter^ get ();
    void set (IMessageFormatter^ value);
}

/** @property */
public IMessageFormatter get_Formatter ()

/** @property */
public void set_Formatter (IMessageFormatter value)

public function get Formatter () : IMessageFormatter

public function set Formatter (value : IMessageFormatter)

Eigenschaftenwert

Der IMessageFormatter, der den Stream erstellt, der in den Meldungstext zu schreiben bzw. aus diesem zu lesen ist. Der Standardwert ist XmlMessageFormatter.

Hinweise

Die Formatter-Eigenschaft enthält eine Instanz eines Formatierungsobjekts, das Meldungen zum Lesen oder Schreiben in einer Warteschlange konvertiert.

Wenn die Anwendung die Meldung an die Warteschlange sendet, serialisiert das Formatierungsprogramm das Objekt in einen Stream und fügt es in den Meldungskörper ein. Beim Lesen aus einer Warteschlange deserialisiert das Formatierungsprogramm die Meldungsdaten in die Body-Eigenschaft einer Message.

Da XmlMessageFormatter lose verknüpft ist, müssen der Objekttyp des Senders und des Empfängers bei diesem Format nicht übereinstimmen. Der ActiveXMessageFormatter und der BinaryMessageFormatter serialisieren die Daten in eine binäre Darstellung. Der ActiveXMessageFormatter wird beim Senden oder Empfangen von COM-Komponenten verwendet.

Der BinaryMessageFormatter und der ActiveXMessageFormatter ermöglichen einen höheren Durchsatz als der XmlMessageFormatter. Der ActiveXMessageFormatter ermöglicht die Interoperabilität mit Message Queuing-Anwendungen aus Visual Basic 6.0.

Wenn die Anwendung Meldungen an die Warteschlange sendet, wird der MessageQueue.Formatter nur auf Meldungen angewendet, die die Standardmeldungseigenschaften (DefaultPropertiesToSend) verwenden. Wenn eine Message an die Warteschlange gesendet wird, verwendet Message Queuing zur Serialisierung des Meldungstextes stattdessen das in der Message.Formatter-Eigenschaft angegebene Formatierungsprogramm.

Die MessageQueue-Klasse verwendet zum Abrufen oder Einsehen einer Meldung aus der Warteschlange immer eine Message. Die Meldung wird anhand der MessageQueue.Formatter-Eigenschaft deserialisiert.

Der folgenden Tabelle können Sie entnehmen, ob diese Eigenschaft in verschiedenen Arbeitsgruppenmodi verfügbar ist.

Arbeitsgruppenmodus	Verfügbar
Lokaler Computer	Ja
Lokaler Computer + direkter Formatname	Ja
Remotecomputer	Nein
Lokaler Computer + direkter Formatname	Ja

Beispiel

Im folgenden Codebeispiel wird das Formatieren eines Meldungstextes mithilfe des BinaryMessageFormatter veranschaulicht.

Imports System
Imports System.Messaging
Imports System.Drawing
Imports System.IO


Namespace MyProj
    _
   
   
   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 a queue on the local computer.
         CreateQueue(".\myQueue")
         
         ' Send a message to a queue.
         myNewQueue.SendMessage()
         
         ' Receive a message from a queue.
         myNewQueue.ReceiveMessage()
         
         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 an image to a queue, using the BinaryMessageFormatter.
      '**************************************************
      Public Sub SendMessage()
         Try
            
            ' Create a new bitmap.
            ' The file must be in the \bin\debug or \bin\retail folder, or
            ' you must give a full path to its location.
            Dim myImage As Image = Bitmap.FromFile("SentImage.bmp")
            
            ' Connect to a queue on the local computer.
            Dim myQueue As New MessageQueue(".\myQueue")
            
            Dim myMessage As New Message(myImage, New BinaryMessageFormatter())
            
            ' Send the image to the queue.
            myQueue.Send(myMessage)
         Catch e As ArgumentException
            Console.WriteLine(e.Message)
         End Try 
         
         Return
      End Sub 'SendMessage
      
      
      
      '**************************************************
      ' Receives a message containing an image.
      '**************************************************
      Public Sub ReceiveMessage()
         
         Try
            
            ' Connect to the a queue on the local computer.
            Dim myQueue As New MessageQueue(".\myQueue")
            
            ' Set the formatter to indicate body contains an Order.
            myQueue.Formatter = New BinaryMessageFormatter()
            
            ' Receive and format the message. 
            Dim myMessage As System.Messaging.Message = myQueue.Receive()
            Dim myImage As Bitmap = CType(myMessage.Body, Bitmap)
            
            ' This will be saved in the \bin\debug or \bin\retail folder.
            myImage.Save("ReceivedImage.bmp", System.Drawing.Imaging.ImageFormat.Bmp)
         
         
         
         'Catch
         ' Handle Message Queuing exceptions.
         
         ' Handle invalid serialization format.
         Catch e As InvalidOperationException
            Console.WriteLine(e.Message)
         
         Catch e As IOException
         End Try
         ' Handle file access exceptions.
         
         ' Catch other exceptions as necessary.
         Return
      End Sub 'ReceiveMessage
   End Class 'MyNewQueue
End Namespace 'MyProj

using System;
using System.Messaging;
using System.Drawing;
using System.IO;

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 a queue on the local computer.
            CreateQueue(".\\myQueue");
            
            // Send a message to a queue.
            myNewQueue.SendMessage();

            // Receive a message from a queue.
            myNewQueue.ReceiveMessage();

            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 an image to a queue, using the BinaryMessageFormatter.
        //**************************************************
        
        public void SendMessage()
        {
            try{

                // Create a new bitmap.
                // The file must be in the \bin\debug or \bin\retail folder, or
                // you must give a full path to its location.
                Image myImage = Bitmap.FromFile("SentImage.bmp");

                // Connect to a queue on the local computer.
                MessageQueue myQueue = new MessageQueue(".\\myQueue");
                
                Message myMessage = new Message(myImage, new BinaryMessageFormatter());

                // Send the image to the queue.
                myQueue.Send(myMessage);
            }
            catch(ArgumentException e)
            {
                Console.WriteLine(e.Message);
            
            }

            return;
        }


        //**************************************************
        // Receives a message containing an image.
        //**************************************************
        
        public  void ReceiveMessage()
        {
                        
            try
            {

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

                // Set the formatter to indicate body contains an Order.
                myQueue.Formatter = new BinaryMessageFormatter();

                // Receive and format the message. 
                System.Messaging.Message myMessage = myQueue.Receive(); 
                Bitmap myImage = (Bitmap)myMessage.Body;
                
                // This will be saved in the \bin\debug or \bin\retail folder.
                myImage.Save("ReceivedImage.bmp",System.Drawing.Imaging.ImageFormat.Bmp);
                
                
            }
            
            catch (MessageQueueException)
            {
                // Handle Message Queuing exceptions.
            }

            // Handle invalid serialization format.
            catch (InvalidOperationException e)
            {
                Console.WriteLine(e.Message);
            }

            catch (IOException e)
            {
                // Handle file access exceptions.
            }
            
            // Catch other exceptions as necessary.

            return;
        }
    }
}

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

using namespace System;
using namespace System::Messaging;
using namespace System::Drawing;
using namespace System::IO;

/// <summary>
/// Provides a container class for the example.
/// </summary>
ref class MyNewQueue
{
public:

   //*************************************************
   // Creates a new queue.
   //*************************************************
   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 );
      }

   }


   //*************************************************
   // Sends an image to a queue, using the BinaryMessageFormatter.
   //*************************************************
   void SendMessage()
   {
      try
      {
         
         // Create a new bitmap.
         // The file must be in the \bin\debug or \bin\retail folder, or
         // you must give a full path to its location.
         Image^ myImage = Bitmap::FromFile( "SentImage::bmp" );
         
         // Connect to a queue on the local computer.
         MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
         Message^ myMessage = gcnew Message( myImage,gcnew BinaryMessageFormatter );
         
         // Send the image to the queue.
         myQueue->Send( myMessage );
      }
      catch ( ArgumentException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

      return;
   }


   //*************************************************
   // Receives a message containing an image.
   //*************************************************
   void ReceiveMessage()
   {
      try
      {
         
         // Connect to the a queue on the local computer.
         MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
         
         // Set the formatter to indicate body contains an Order.
         myQueue->Formatter = gcnew BinaryMessageFormatter;
         
         // Receive and format the message. 
         Message^ myMessage = myQueue->Receive();
         Bitmap^ myImage = static_cast<Bitmap^>(myMessage->Body);
         
         // This will be saved in the \bin\debug or \bin\retail folder.
         myImage->Save( "ReceivedImage::bmp", System::Drawing::Imaging::ImageFormat::Bmp );
      }
      catch ( MessageQueueException^ ) 
      {
         
         // Handle Message Queuing exceptions.
      }
      // Handle invalid serialization format.
      catch ( InvalidOperationException^ e ) 
      {
         Console::WriteLine( e->Message );
      }
      catch ( IOException^ e ) 
      {
         
         // Handle file access exceptions.
      }

      
      // Catch other exceptions as necessary.
      return;
   }

};


//*************************************************
// Provides an entry point into the application.
//         
// This example sends and receives a message from
// a queue.
//*************************************************
int main()
{
   
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;
   
   // Create a queue on the local computer.
   MyNewQueue::CreateQueue( ".\\myQueue" );
   
   // Send a message to a queue.
   myNewQueue->SendMessage();
   
   // Receive a message from a queue.
   myNewQueue->ReceiveMessage();
   return 0;
}

package MyProject;

import System.*;
import System.Messaging.*;
import System.Drawing.*;
import System.IO.*;

/// <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 a queue on the local computer.
        CreateQueue(".\\myQueue");

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

        // Receive a message from a queue.
        myNewQueue.ReceiveMessage();

        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 an image to a queue, using the BinaryMessageFormatter.
    //**************************************************
    public void SendMessage()
    {
        try {
            // Create a new bitmap.
            // The file must be in the \bin\debug or \bin\retail folder, or
            // you must give a full path to its location.
            Image myImage = Bitmap.FromFile("SentImage.bmp");

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

            Message myMessage = new Message(myImage, 
                new BinaryMessageFormatter());

            // Send the image to the queue.
            myQueue.Send(myMessage);
        }
        catch (ArgumentException e) {
            Console.WriteLine(e.get_Message());
        }
        return;
    } //SendMessage

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

            // Set the formatter to indicate body contains an Order.
            myQueue.set_Formatter(new BinaryMessageFormatter());

            // Receive and format the message. 
            System.Messaging.Message myMessage = myQueue.Receive();
            Bitmap myImage = (Bitmap)myMessage.get_Body();

            // This will be saved in the \bin\debug or \bin\retail folder.
            myImage.Save("ReceivedImage.bmp", 
                System.Drawing.Imaging.ImageFormat.get_Bmp());
        }
        catch (MessageQueueException exp) {
            // Handle Message Queuing exceptions.
        }
        
        // Handle invalid serialization format.
        catch (InvalidOperationException e) {
            Console.WriteLine(e.get_Message());
        }

        catch (IOException e) {
            // Handle file access exceptions.
        }

        // Catch other exceptions as necessary.
        return;
    } //ReceiveMessage
} //MyNewQueue

Im folgenden Codebeispiel wird das Formatieren eines Meldungstextes mithilfe des XmlMessageFormatter veranschaulicht.

Imports System
Imports System.Messaging
Imports System.Drawing
Imports System.IO



   
' The following example 
' sends to a queue and receives from a queue.
Public Class Order
      Public orderId As Integer
      Public orderTime As DateTime
End Class 'Order

   
  
' 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 a queue on the local computer.
      CreateQueue(".\myQueue")
         
      ' Send a message to a queue.
      myNewQueue.SendMessage()
       
      ' Receive a message from a queue.
      myNewQueue.ReceiveMessage()
         
      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 an Order to a queue.

   Public Sub SendMessage()
      Try
            
            ' Create a new order and set values.
            Dim sentOrder As New Order()
            sentOrder.orderId = 3
            sentOrder.orderTime = DateTime.Now
            
            ' Connect to a queue on the local computer.
            Dim myQueue As New MessageQueue(".\myQueue")
            
            
            
            ' Create the new order.
            Dim myMessage As New Message(sentOrder)
            
            ' Send the order to the queue.
            myQueue.Send(myMessage)
      Catch e As ArgumentException
            Console.WriteLine(e.Message)
      End Try 
         
      Return
   End Sub 'SendMessage
      
      
      
 
      ' Receives a message containing an order.
 
   Public Sub ReceiveMessage()
         ' Connect to the a queue on the local computer.
         Dim myQueue As New MessageQueue(".\myQueue")
         
         ' Set the formatter to indicate body contains an Order.
         myQueue.Formatter = New XmlMessageFormatter(New Type() {GetType(Order)})
         
         Try
            ' Receive and format the message. 
            Dim myMessage As Message = myQueue.Receive()
            Dim myOrder As Order = CType(myMessage.Body, Order)
            
            ' Display message information.
            Console.WriteLine(("Order ID: " + myOrder.orderId.ToString()))
            Console.WriteLine(("Sent: " + myOrder.orderTime.ToString()))
         
  
         ' Handle invalid serialization format.
         Catch e As InvalidOperationException
            Console.WriteLine(e.Message)
         End Try
         
         ' Catch other exceptions as necessary.
         Return
   End Sub 'ReceiveMessage
End Class 'MyNewQueue

using System;
using System.Messaging;
using System.Drawing;
using System.IO;

namespace MyProject
{

    // The following example 
    // sends to a queue and receives from a queue.
    public class Order
    {
        public int orderId;
        public DateTime orderTime;
    };  

    /// <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 a queue on the local computer.
            CreateQueue(".\\myQueue");
            
            // Send a message to a queue.
            myNewQueue.SendMessage();

            // Receive a message from a queue.
            myNewQueue.ReceiveMessage();

            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 an Order to a queue.
        //**************************************************
        
        public void SendMessage()
        {
            try
            {

                // Create a new order and set values.
                Order sentOrder = new Order();
                sentOrder.orderId = 3;
                sentOrder.orderTime = DateTime.Now;

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


                
                // Create the new order.
                Message myMessage = new Message(sentOrder);

                // Send the order to the queue.
                myQueue.Send(myMessage);
            }
            catch(ArgumentException e)
            {
                Console.WriteLine(e.Message);
            
            }

            return;
        }


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

            // Set the formatter to indicate body contains an Order.
            myQueue.Formatter = new XmlMessageFormatter(new Type[]
                {typeof(MyProject.Order)});
            
            try
            {
                // Receive and format the message. 
                Message myMessage = myQueue.Receive(); 
                Order myOrder = (Order)myMessage.Body;

                // Display message information.
                Console.WriteLine("Order ID: " + 
                    myOrder.orderId.ToString());
                Console.WriteLine("Sent: " + 
                    myOrder.orderTime.ToString());
            }
            
            catch (MessageQueueException)
            {
                // Handle Message Queuing exceptions.
            }

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

            return;
        }
    }
}

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

using namespace System;
using namespace System::Messaging;
using namespace System::Drawing;
using namespace System::IO;
ref class Order
{
public:
   int orderId;
   DateTime orderTime;
};

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()
   {
      try
      {
         // Create a new order and set values.
         Order^ sentOrder = gcnew Order;
         sentOrder->orderId = 3;
         sentOrder->orderTime = DateTime::Now;

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

         // Create the new order.
         Message^ myMessage = gcnew Message( sentOrder );

         // Send the order to the queue.
         myQueue->Send( myMessage );
      }
      catch ( ArgumentException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

      return;
   }

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

      // Set the formatter to indicate body contains an Order.
      array<Type^>^p = gcnew array<Type^>(1);
      p[ 0 ] = Order::typeid;
      myQueue->Formatter = gcnew XmlMessageFormatter( p );
      try
      {
         // Receive and format the message. 
         Message^ myMessage = myQueue->Receive();
         Order^ myOrder = dynamic_cast<Order^>(myMessage->Body);

         // Display message information.
         Console::WriteLine( "Order ID: {0}", myOrder->orderId );
         Console::WriteLine( "Sent: {0}", myOrder->orderTime );
      }
      catch ( MessageQueueException^ ) 
      {
         // Handle Message Queuing exceptions.
      }
      // Handle invalid serialization format.
      catch ( InvalidOperationException^ e ) 
      {
         Console::WriteLine( e->Message );
      }

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

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

   // Create a queue on the local computer.
   MyNewQueue::CreateQueue( ".\\myQueue" );

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

   // Receive a message from a queue.
   myNewQueue->ReceiveMessage();
   return 0;
}

package MyProject;

import System.*;
import System.Messaging.*;
import System.Drawing.*;
import System.IO.*;

// The following example 
// sends to a queue and receives from a queue.
public class Order
{
    public int orderId;
    public DateTime orderTime;
} //Order

/// <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 a queue on the local computer.
        CreateQueue(".\\myQueue");

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

        // Receive a message from a queue.
        myNewQueue.ReceiveMessage();

        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 an Order to a queue.
    //**************************************************
    public void SendMessage()
    {
        try {
            // Create a new order and set values.
            Order sentOrder = new Order();
            sentOrder.orderId = 3;
            sentOrder.orderTime = DateTime.get_Now();

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

            // Create the new order.
            Message myMessage = new Message(sentOrder);

            // Send the order to the queue.
            myQueue.Send(myMessage);
        }
        catch (ArgumentException e) {
            Console.WriteLine(e.get_Message());
        }
        return;
    } //SendMessage

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

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

        try {
            // Receive and format the message. 
            Message myMessage = myQueue.Receive();
            Order myOrder = (Order)myMessage.get_Body();

            // Display message information.
            Console.WriteLine("Order ID: " + Convert.ToString(myOrder.orderId));
            Console.WriteLine("Sent: " + myOrder.orderTime.ToString());
        }
        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;
    } //ReceiveMessage
} //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

MessageQueue-Klasse
MessageQueue-Member
System.Messaging-Namespace
XmlMessageFormatter
ActiveXMessageFormatter-Klasse
BinaryMessageFormatter-Klasse
Message.Formatter-Eigenschaft

Freigeben über