BinaryMessageFormatter 類別

定義

命名空間:

System.Messaging

組件:

System.Messaging.dll

使用二進位格式將訊息佇列訊息的主體序列化或還原序列化物件，或連接物件的整個圖解。

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

繼承

Object

BinaryMessageFormatter

實作

ICloneable IMessageFormatter

範例

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

備註

重要

使用不信任的資料呼叫此類別的方法，會造成安全性上的風險。 呼叫此類別的方法時，請一律使用信任的資料。 如需詳細資訊，請參閱 驗證所有輸入。

BinaryMessageFormatter非常有效率，可用來串行化大部分的物件。 結果非常精簡且快速剖析，但不允許鬆散結合的傳訊。XmlMessageFormatter 鬆散結合表示客戶端和伺服器可以獨立設定傳送和接收的類型版本。

當應用程式使用 類別的 MessageQueue 實例將訊息傳送至佇列時，格式器會將物件串行化為數據流，並將其插入訊息本文。 使用 MessageQueue從佇列讀取時，格式子會將訊息數據還原串行化為 Body 的 Message屬性。

BinaryMessageFormatter 提供比 更快的 XmlMessageFormatter輸送量。 BinaryMessageFormatter當需要純速度而非鬆散結合傳訊時，請使用 。

建構函式

BinaryMessageFormatter()	初始化 BinaryMessageFormatter 類別的新執行個體，而不指定型別樣式或最上層物件組件樣式。
BinaryMessageFormatter(FormatterAssemblyStyle, FormatterTypeStyle)	初始化 BinaryMessageFormatter 類別的新執行個體，指定根物件和型別描述的格式。

屬性

TopObjectFormat	取得或設定值，定義在尋找和載入圖形之最上層 (根) 物件的組件時還原序列化它的方式。
TypeFormat	取得或設定數值，定義如何在序列資料流中配置型別描述。

方法

CanRead(Message)	決定格式子是否能夠還原序列化訊息的內容。
Clone()	建立 BinaryMessageFormatter 類別的執行個體，其讀取/寫入屬性 (根物件和型別描述格式) 和目前的 BinaryMessageFormatter 相同。
Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
Read(Message)	讀取指定訊息的內容，並建立包含還原序列化訊息的物件。
ToString()	傳回代表目前物件的字串。 (繼承來源 Object)
Write(Message, Object)	將物件序列化到訊息主體中。

另請參閱

• XmlMessageFormatter
• ActiveXMessageFormatter
• Formatter
• Formatter