BinaryMessageFormatter Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
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
- Inheritance
-
BinaryMessageFormatter
- Implements
Examples
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
Remarks
Important
Calling methods from this class with untrusted data is a security risk. Call the methods from this class only with trusted data. For more information, see Validate All Inputs.
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.
Constructors
BinaryMessageFormatter() |
Initializes a new instance of the BinaryMessageFormatter class without specifying a type style or top object assembly style. |
BinaryMessageFormatter(FormatterAssemblyStyle, FormatterTypeStyle) |
Initializes a new instance of the BinaryMessageFormatter class, specifying the formats of the root object and the type descriptions. |
Properties
TopObjectFormat |
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 |
Gets or sets a value that defines how type descriptions are laid out in the serialized stream. |
Methods
CanRead(Message) |
Determines whether the formatter can deserialize the contents of the message. |
Clone() |
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) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
GetType() |
Gets the Type of the current instance. (Inherited from Object) |
MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
Read(Message) |
Reads the contents from the given message and creates an object that contains the deserialized message. |
ToString() |
Returns a string that represents the current object. (Inherited from Object) |
Write(Message, Object) |
Serializes an object into the body of the message. |
Applies to
See also
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