BinaryMessageFormatter Classe

Definizione

Serializza o deserializza un oggetto o un intero grafico di oggetti collegati, nel o dal corpo di un messaggio di Accodamento messaggi, utilizzando un formato binario.Serializes or deserializes an object, or an entire graph of connected objects, to or from the body of a Message Queuing message, using a binary format.

public ref class BinaryMessageFormatter : ICloneable, System::Messaging::IMessageFormatter
public class BinaryMessageFormatter : ICloneable, System.Messaging.IMessageFormatter
type BinaryMessageFormatter = class
    interface IMessageFormatter
    interface ICloneable
Public Class BinaryMessageFormatter
Implements ICloneable, IMessageFormatter
Ereditarietà
BinaryMessageFormatter
Implementazioni

Esempi

#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;
}

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;
        }
    }
}
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
      
      
      '**************************************************
      ' 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
       
      
      '**************************************************
      ' 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
      
      
      
      '**************************************************
      ' 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
   End Class
End Namespace 'MyProj

Commenti

Importante

La chiamata a metodi da questa classe con dati non attendibili costituisce un rischio per la sicurezza.Calling methods from this class with untrusted data is a security risk. Chiamare i metodi da questa classe solo con dati attendibili.Call the methods from this class only with trusted data. Per altre informazioni, vedere Data Validation (Convalida dei dati).For more information, see Data Validation.

BinaryMessageFormatter È molto efficiente e può essere usato per serializzare la maggior parte degli oggetti.The BinaryMessageFormatter is very efficient and can be used to serialize most objects. Il risultato è molto compatto e veloce da analizzare, ma non consente la XmlMessageFormatter messaggistica a regime di controllo libero.The result is very compact and fast to parse, but does not allow for loosely coupled messaging as the XmlMessageFormatter does. A regime di controllo libero, il client e il server possono in modo indipendente il tipo che viene inviato e ricevuto.Loosely coupled means that the client and the server can independently version the type that is sent and received.

Quando l'applicazione invia un messaggio alla coda usando un'istanza della MessageQueue classe, il formattatore serializza l'oggetto in un flusso e lo inserisce nel corpo del messaggio.When the application sends a message to the queue using an instance of the MessageQueue class, the formatter serializes the object into a stream and inserts it into the message body. Quando si esegue la lettura da una MessageQueuecoda utilizzando un oggetto, il formattatore deserializza i dati Body del messaggio nella Messageproprietà di un oggetto.When reading from a queue using a MessageQueue, the formatter deserializes the message data into the Body property of a Message.

BinaryMessageFormatterfornisce una XmlMessageFormattervelocità effettiva più veloce rispetto a.BinaryMessageFormatter provides faster throughput than the XmlMessageFormatter. Usare la BinaryMessageFormatter semplice velocità anziché la messaggistica a regime di controllo libero.Use the BinaryMessageFormatter when pure speed rather than loosely coupled messaging is desired.

Costruttori

BinaryMessageFormatter()

Inizializza una nuova istanza della classe BinaryMessageFormatter, senza specificare uno stile per il tipo o per l'assembly di oggetti Top.Initializes a new instance of the BinaryMessageFormatter class without specifying a type style or top object assembly style.

BinaryMessageFormatter(FormatterAssemblyStyle, FormatterTypeStyle)

Inizializza una nuova istanza della classe BinaryMessageFormatter che specifica i formati dell'oggetto di primo livello e le descrizioni dei tipi.Initializes a new instance of the BinaryMessageFormatter class, specifying the formats of the root object and the type descriptions.

Proprietà

TopObjectFormat

Ottiene o imposta un valore che definisce il modo in cui l'oggetto di primo livello viene deserializzato rispetto all'individuazione e al caricamento dell'assembly.Gets or sets a value that defines how the top (root) object of a graph is deserialized with regards to finding and loading its assembly.

TypeFormat

Ottiene o imposta un valore che definisce le modalità di disposizione delle descrizioni dei tipi all'interno del flusso serializzato.Gets or sets a value that defines how type descriptions are laid out in the serialized stream.

Metodi

CanRead(Message)

Determina se il formattatore può deserializzare il contenuto del messaggio.Determines whether the formatter can deserialize the contents of the message.

Clone()

Crea un'istanza della classe BinaryMessageFormatter le cui proprietà di lettura/scrittura (i formati di descrizione dei tipi e dell'oggetto di primo livello) siano identiche a quelle del BinaryMessageFormatter corrente.Creates an instance of the BinaryMessageFormatter class whose read/write properties (the root object and type description formats) are the same as the current BinaryMessageFormatter.

Equals(Object)

Determina se l'oggetto specificato è uguale all'oggetto corrente.Determines whether the specified object is equal to the current object.

(Ereditato da Object)
GetHashCode()

Funge da funzione hash predefinita.Serves as the default hash function.

(Ereditato da Object)
GetType()

Ottiene l'oggetto Type dell'istanza corrente.Gets the Type of the current instance.

(Ereditato da Object)
MemberwiseClone()

Crea una copia superficiale dell'oggetto Object corrente.Creates a shallow copy of the current Object.

(Ereditato da Object)
Read(Message)

Legge il contenuto del messaggio indicato e crea un oggetto contenente il messaggio deserializzato.Reads the contents from the given message and creates an object that contains the deserialized message.

ToString()

Restituisce una stringa che rappresenta l'oggetto corrente.Returns a string that represents the current object.

(Ereditato da Object)
Write(Message, Object)

Serializza un oggetto nel corpo del messaggio.Serializes an object into the body of the message.

Si applica a

Vedi anche