Message-Konstruktor (Object, IMessageFormatter)
Initialisiert eine neue Instanz der Message-Klasse, wobei das angegebene Objekt mithilfe des angegebenen Formatierers in den Meldungstext serialisiert wird.
Namespace: System.Messaging
Assembly: System.Messaging (in system.messaging.dll)
Syntax
'Declaration
Public Sub New ( _
body As Object, _
formatter As IMessageFormatter _
)
'Usage
Dim body As Object
Dim formatter As IMessageFormatter
Dim instance As New Message(body, formatter)
public Message (
Object body,
IMessageFormatter formatter
)
public:
Message (
Object^ body,
IMessageFormatter^ formatter
)
public Message (
Object body,
IMessageFormatter formatter
)
public function Message (
body : Object,
formatter : IMessageFormatter
)
Parameter
- body
Das Objekt, das in den Meldungstext serialisiert werden soll.
- formatter
Der IMessageFormatter gibt den Formatierer an, mit dem die Serialisierung in den Meldungstext erfolgen soll.
Hinweise
Erstellen Sie mit dieser Überladung eine neue Instanz der Message-Klasse, die den im body-Parameter angegebenen Body enthält und einen zulässigen Formatierer zum Serialisieren des Textkörpers verwendet. Der body-Parameter kann ein beliebiges serialisierbares Objekt sein, beispielsweise eine Zeichenfolge, ein Strukturobjekt, eine Klasseninstanz oder ein eingebettetes Objekt. Wenn Sie die Body-Eigenschaft oder die Formatter-Eigenschaft vor dem Aufruf von Send ändern, wird die Meldung entsprechend des neuen Eigenschaftenwerts serialisiert.
Da der XmlMessageFormatter lose verknüpft ist, müssen der Objekttyp des Senders und des Empfängers bei diesem Format nicht übereinstimmen. Der ActiveXMessageFormatter und der BinaryMessageFormatter serialisieren die Daten in eine binäre Darstellung. Der ActiveXMessageFormatter wird beim Senden oder Empfangen von COM-Komponenten verwendet.
In der folgenden Tabelle werden die anfänglichen Eigenschaftenwerte für eine Instanz der Message aufgeführt.
Eigenschaft |
Anfangswert |
|---|---|
AcknowledgeType.None |
|
NULL (Nothing in Visual Basic) |
|
0 |
|
true |
|
Microsoft Base Cryptographic Provider, Version 1.0 |
|
CryptoProviderType.RSA_FULL |
|
Body |
Der body-Parameter. |
Stream.null |
|
0 |
|
Guid.Empty |
|
Eine leere Zeichenfolge ("") |
|
Ein Bytearray mit der Länge 0 |
|
Ein Bytearray mit der Länge 0 |
|
EncryptionAlgorithm.RC2 |
|
Ein Bytearray mit der Länge 0 |
|
Formatter |
Der formatter-Parameter. |
HashAlgorithm.MD5 |
|
Eine leere Zeichenfolge ("") |
|
MessagePriority.Normal |
|
false |
|
NULL (Nothing in Visual Basic) |
|
Ein Bytearray mit der Länge 0 |
|
Message.InfiniteTimeout |
|
Message.InfiniteTimeout |
|
NULL (Nothing in Visual Basic) |
|
false |
|
false |
|
false |
|
false |
|
false |
Beispiel
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-Sicherheit
- Volle Vertrauenswürdigkeit für den unmittelbaren Aufrufer. Dieser Member kann von nur teilweise vertrauenswürdigem Code nicht verwendet werden. Weitere Informationen finden Sie unter .
Plattformen
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.
Versionsinformationen
.NET Framework
Unterstützt in: 2.0, 1.1, 1.0
.NET Compact Framework
Unterstützt in: 2.0
Siehe auch
Referenz
Message-Klasse
Message-Member
System.Messaging-Namespace
XmlMessageFormatter
BinaryMessageFormatter-Klasse
ActiveXMessageFormatter-Klasse
DefaultPropertiesToSend-Klasse
MessageQueue
Send
Peek
Receive