BinaryMessageFormatter Class
Assembly: System.Messaging (in system.messaging.dll)
The BinaryMessageFormatter is very efficient and can be used to serialize most objects. The result is very compact and fast to parse, but does not allow for loosely coupled messaging as the XmlMessageFormatter does. Loosely coupled means that the client and the server can independently version the type that is sent and received.
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. When reading from a queue using a MessageQueue, the formatter deserializes the message data into the Body property of a Message.
BinaryMessageFormatter provides faster throughput than the XmlMessageFormatter. Use the BinaryMessageFormatter when pure speed rather than loosely coupled messaging is desired.
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
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
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.