Message コンストラクタとは? わかりやすく解説

Message コンストラクタ (Object)

指定したオブジェクトメッセージ本文シリアル化するために XmlMessageFormatter を使用してMessage クラス新しインスタンス初期化します。

名前空間: System.Messaging
アセンブリ: System.Messaging (system.messaging.dll 内)
構文構文

解説解説

このオーバーロード使用してbody パラメータによって指定されBody を含む Message クラス新しインスタンス作成しますbodyパラメータ指定できるのは、テキスト文字列構造体オブジェクトクラス インスタンス埋め込みオブジェクトなど、シリアル化できる任意のオブジェクトです。Message送信される前に Formatter プロパティ変更しない限り本文は、XmlMessageFormatter使ってシリアル化されますSend呼び出す前に Body プロパティまたは Formatter プロパティ変更すると、メッセージ新しプロパティに従ってシリアル化されます

XmlMessageFormatter疎結合であるため、この形式使用する場合に、送信側受信側オブジェクト型が同じである必要はありません。ActiveXMessageFormatter と BinaryMessageFormatter は、データシリアル化してバイナリ表現にします。ActiveXMessageFormatterCOM コンポーネント送受信するときに使用されます。

Messageインスタンス初期プロパティ値を次の表に示します

プロパティ

初期値

AcknowledgeType

AcknowledgeType.None

AdministrationQueue

null 参照 (Visual Basic では Nothing)

AppSpecific

0

AttachSenderId

true

AuthenticationProviderName

Microsoft ベース暗号化プロバイダ Version 1.0

AuthenticationProviderType

CryptoProviderType.RSA_FULL

Body

body パラメータ

BodyStream

Stream.null

BodyType

0

ConnectorType

Guid.Empty

CorrelationId

空の文字列 ("")

DestinationSymmetricKey

長さ 0 のバイト配列

DigitalSignature

長さ 0 のバイト配列

EncryptionAlgorithm

EncryptionAlgorithm.RC2

Extension

長さ 0 のバイト配列

Formatter

XmlMessageFormatter

HashAlgorithm

HashAlgorithm.MD5

Label

空の文字列 ("")

Priority

MessagePriority.Normal

Recoverable

false

ResponseQueue

null 参照 (Visual Basic では Nothing)

SenderCertificate

長さ 0 のバイト配列

TimeToBeReceived

Message.InfiniteTimeout

TimeToReachQueue

Message.InfiniteTimeout

TransactionStatusQueue

null 参照 (Visual Basic では Nothing)

UseAuthentication

false

UseDeadLetterQueue

false

UseEncryption

false

UseJournalQueue

false

UseTracing

false

使用例使用例

新しキュー作成しオーダーを含むメッセージキュー送信し最後にメッセージ受信するコード例次に示します

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
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参照参照

Message コンストラクタ (Object, IMessageFormatter)

指定したオブジェクトメッセージ本文シリアル化するために指定したフォーマッタ使用してMessage クラス新しインスタンス初期化します。

名前空間: System.Messaging
アセンブリ: System.Messaging (system.messaging.dll 内)
構文構文

解説解説

このオーバーロード使用してbody パラメータによって指定され本文シリアル化するための有効なフォーマッタ使用する Body格納するMessage クラス新しインスタンス作成しますbodyパラメータ指定できるのは、テキスト文字列構造体オブジェクトクラス インスタンス埋め込みオブジェクトなど、シリアル化できる任意のオブジェクトです。Send呼び出す前に Body プロパティまたは Formatter プロパティ変更すると、メッセージ新しプロパティに従ってシリアル化されます

XmlMessageFormatter は疎結合であるため、この形式使用する場合に、送信側受信側オブジェクト型が同じである必要はありません。ActiveXMessageFormatter と BinaryMessageFormatter は、データシリアル化してバイナリ表現にします。ActiveXMessageFormatterCOM コンポーネント送受信するときに使用されます。

Messageインスタンス初期プロパティ値を次の表に示します

プロパティ

初期値

AcknowledgeType

AcknowledgeType.None

AdministrationQueue

null 参照 (Visual Basic では Nothing)

AppSpecific

0

AttachSenderId

true

AuthenticationProviderName

Microsoft ベース暗号化プロバイダ Version 1.0

AuthenticationProviderType

CryptoProviderType.RSA_FULL

Body

body パラメータ

BodyStream

Stream.null

BodyType

0

ConnectorType

Guid.Empty

CorrelationId

空の文字列 ("")

DestinationSymmetricKey

長さ 0 のバイト配列

DigitalSignature

長さ 0 のバイト配列

EncryptionAlgorithm

EncryptionAlgorithm.RC2

Extension

長さ 0 のバイト配列

Formatter

formatter パラメータ

HashAlgorithm

HashAlgorithm.MD5

Label

空の文字列 ("")

Priority

MessagePriority.Normal

Recoverable

false

ResponseQueue

null 参照 (Visual Basic では Nothing)

SenderCertificate

長さ 0 のバイト配列

TimeToBeReceived

Message.InfiniteTimeout

TimeToReachQueue

Message.InfiniteTimeout

TransactionStatusQueue

null 参照 (Visual Basic では Nothing)

UseAuthentication

false

UseDeadLetterQueue

false

UseEncryption

false

UseJournalQueue

false

UseTracing

false

使用例使用例
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
.NET Framework のセキュリティ.NET Frameworkセキュリティ
プラットフォームプラットフォーム
バージョン情報バージョン情報
参照参照
関連項目
Message クラス
Message メンバ
System.Messaging 名前空間
XmlMessageFormatter
BinaryMessageFormatter クラス
ActiveXMessageFormatter クラス
DefaultPropertiesToSend クラス
MessageQueue
Send
Peek
Receive

Message コンストラクタ

メモ : このコンストラクタは、.NET Framework version 2.0新しく追加されたものです。

Message クラス新しインスタンス初期化します。

名前空間: Microsoft.Build.Tasks
アセンブリ: Microsoft.Build.Tasks (microsoft.build.tasks.dll 内)
構文構文

.NET Framework のセキュリティ.NET Frameworkセキュリティ
プラットフォームプラットフォーム
バージョン情報バージョン情報

.NET Framework

サポート対象 : 2.0
参照参照

関連項目

Message クラス
Message メンバ
Microsoft.Build.Tasks 名前空間

Message コンストラクタ


Message コンストラクタ


Message コンストラクタ ()

Message クラス新しインスタンスを、空の本文初期化します。

名前空間: System.Messaging
アセンブリ: System.Messaging (system.messaging.dll 内)
構文構文

解説解説

このオーバーロード使用して本文が空の Message クラス新しインスタンス作成します

Message オブジェクト送信する前にBody プロパティまたは BodyStream プロパティいずれか指定しますこのうち Body プロパティには、テキスト文字列構造体オブジェクトクラス インスタンス埋め込みオブジェクトなど、シリアル化できる任意のオブジェクト使用できます

メッセージ内容BodyStream プロパティ直接書き込む以外は、メッセージ送信する前に Formatter プロパティ設定します本文は、MessageQueue インスタンスSend メソッド呼び出され時点Formatter プロパティの値を使ってシリアル化されます

XmlMessageFormatter は疎結合であるため、この形式使用する場合に、送信側受信側オブジェクト型が同じである必要はありません。ActiveXMessageFormatter と BinaryMessageFormatter は、データシリアル化してバイナリ表現にします。ActiveXMessageFormatterCOM コンポーネント送受信するときに使用されます。

Messageインスタンス初期プロパティ値を次の表に示します

プロパティ

初期値

AcknowledgeType

AcknowledgeType.None

AdministrationQueue

null 参照 (Visual Basic では Nothing)

AppSpecific

0

AttachSenderId

true

AuthenticationProviderName

Microsoft ベース暗号化プロバイダ Version 1.0

AuthenticationProviderType

CryptoProviderType.RSA_FULL

Body

null 参照 (Visual Basic では Nothing)

BodyStream

Stream.null

BodyType

0

ConnectorType

Guid.Empty

CorrelationId

空の文字列 ("")

DestinationSymmetricKey

長さ 0 のバイト配列

DigitalSignature

長さ 0 のバイト配列

EncryptionAlgorithm

EncryptionAlgorithm.RC2

Extension

長さ 0 のバイト配列

Formatter

XmlMessageFormatter

HashAlgorithm

HashAlgorithm.MD5

Label

空の文字列 ("")

Priority

MessagePriority.Normal

Recoverable

false

ResponseQueue

null 参照 (Visual Basic では Nothing)

SenderCertificate

長さ 0 のバイト配列

TimeToBeReceived

Message.InfiniteTimeout

TimeToReachQueue

Message.InfiniteTimeout

TransactionStatusQueue

null 参照 (Visual Basic では Nothing)

UseAuthentication

false

UseDeadLetterQueue

false

UseEncryption

false

UseJournalQueue

false

UseTracing

false

使用例使用例

優先度異な2 つメッセージキュー送信し順番取得するコード例次に示します

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()
         
         ' Send messages to a queue.
         myNewQueue.SendMessage(MessagePriority.Normal, "First
 Message Body.")
         myNewQueue.SendMessage(MessagePriority.Highest, "Second
 Message Body.")
         
         ' Receive messages from a queue.
         myNewQueue.ReceiveMessage()
         myNewQueue.ReceiveMessage()
         
         Return
      End Sub 'Main
      
      
      

      ' Sends a string message to a queue.

      Public Sub SendMessage(priority As
 MessagePriority, messageBody As String)
         
         ' Connect to a queue on the local computer.
         Dim myQueue As New
 MessageQueue(".\myQueue")
         
         ' Create a new message.
         Dim myMessage As New
 Message()
         
         If priority > MessagePriority.Normal Then
            myMessage.Body = "High Priority: " + messageBody
         Else
            myMessage.Body = messageBody
         End If 
         ' Set the priority of the message.
         myMessage.Priority = priority
         
         
         ' Send the Order to the queue.
         myQueue.Send(myMessage)
         
         Return
      End Sub 'SendMessage
      
      
      

      ' Receives a message.

      Public Sub ReceiveMessage()
         ' Connect to the a queue on the local computer.
         Dim myQueue As New
 MessageQueue(".\myQueue")
         
         ' Set the queue to read the priority. By default, it
         ' is not read.
         myQueue.MessageReadPropertyFilter.Priority = True
         
         ' Set the formatter to indicate body contains a string.
         myQueue.Formatter = New XmlMessageFormatter(New
 Type() {GetType(String)})
         
         Try
            ' Receive and format the message. 
            Dim myMessage As Message = myQueue.Receive()
            
            ' Display message information.
            Console.WriteLine(("Priority: " + myMessage.Priority.ToString()))
            Console.WriteLine(("Body: " + myMessage.Body.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;

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();

            // Send messages to a queue.
            myNewQueue.SendMessage(MessagePriority.Normal, "First Message Body.");
            myNewQueue.SendMessage(MessagePriority.Highest, "Second Message
 Body.");

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

            return;
        }


        //**************************************************
        // Sends a string message to a queue.
        //**************************************************
        
        public void SendMessage(MessagePriority
 priority, string messageBody)
        {

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

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

            if(priority > MessagePriority.Normal)
            {
                myMessage.Body = "High Priority: " + messageBody;
            }
            else myMessage.Body = messageBody;

            // Set the priority of the message.
            myMessage.Priority = priority;


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

            return;
        }


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

            // Set the queue to read the priority. By default, it
            // is not read.
            myQueue.MessageReadPropertyFilter.Priority = true;

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

                // Display message information.
                Console.WriteLine("Priority: " + 
                    myMessage.Priority.ToString());
                Console.WriteLine("Body: " + 
                    myMessage.Body.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 namespace System;
using namespace System::Messaging;

/// <summary>
/// Provides a container class for the example.
/// </summary>
ref class MyNewQueue
{
   //**************************************************
   // Sends a string message to a queue.
   //**************************************************
public:
   void SendMessage( MessagePriority priority, String^ messageBody
 )
   {
      // Connect to a queue on the local computer.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );

      // Create a new message.
      Message^ myMessage = gcnew Message;
      if ( priority > MessagePriority::Normal )
      {
         myMessage->Body = "High Priority: {0}",messageBody;
      }
      else
      {
         myMessage->Body = messageBody;
      }

      // Set the priority of the message.
      myMessage->Priority = priority;

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

      return;
   }

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

      // Set the queue to read the priority. By default, it
      // is not read.
      myQueue->MessageReadPropertyFilter->Priority = true;

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

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

      // 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;

   // Send messages to a queue.
   myNewQueue->SendMessage( MessagePriority::Normal, "First Message Body."
 );
   myNewQueue->SendMessage( MessagePriority::Highest, "Second Message Body."
 );

   // Receive messages from a queue.
   myNewQueue->ReceiveMessage();
   myNewQueue->ReceiveMessage();

   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();
        // Send messages to a queue.
        myNewQueue.SendMessage(MessagePriority.Normal, "First Message Body.");
        myNewQueue.SendMessage(MessagePriority.Highest, "Second Message Body.");
        // Receive messages from a queue.
        myNewQueue.ReceiveMessage();
        myNewQueue.ReceiveMessage();
        return;
    } //main

    //**************************************************
    // Sends a string message to a queue.
    //**************************************************
    public void SendMessage(MessagePriority
 priority, String messageBody)
    {
        // Connect to a queue on the local computer.
        MessageQueue myQueue = new MessageQueue(".\\myQueue");
        // Create a new message.
        Message myMessage = new Message();

        if (priority.CompareTo(MessagePriority.Normal) > 0)
 {
            myMessage.set_Body("High Priority: " + messageBody);
        }
        else {
            myMessage.set_Body(messageBody);
        }
        // Set the priority of the message.
        myMessage.set_Priority(priority);
        // Send the Order to the queue.
        myQueue.Send(myMessage);
        return;
    } //SendMessage

    //**************************************************
    // Receives a message.
    //**************************************************
    public void ReceiveMessage()
    {
        // Connect to the a queue on the local computer.
        MessageQueue myQueue = new MessageQueue(".\\myQueue");
        // Set the queue to read the priority. By default, it
        // is not read.
        myQueue.get_MessageReadPropertyFilter().set_Priority(true);
        // Set the formatter to indicate body contains a string.
        myQueue.set_Formatter(new XmlMessageFormatter(new
 Type[]
            { String.class.ToType() }));
        try {
            // Receive and format the message. 
            Message myMessage = myQueue.Receive();
            // Display message information.
            Console.WriteLine("Priority: " + myMessage.get_Priority().ToString());
            Console.WriteLine("Body: " + myMessage.get_Body().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
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