MessageQueue.MessageReadPropertyFilter Свойство
Определение
Важно!
Некоторые сведения относятся к предварительной версии продукта, в которую до выпуска могут быть внесены существенные изменения. Майкрософт не предоставляет никаких гарантий, явных или подразумеваемых, относительно приведенных здесь сведений.
Получает или задает фильтр свойств для получения и считывания сообщений.
public:
property System::Messaging::MessagePropertyFilter ^ MessageReadPropertyFilter { System::Messaging::MessagePropertyFilter ^ get(); void set(System::Messaging::MessagePropertyFilter ^ value); };
[System.ComponentModel.Browsable(false)]
[System.Messaging.MessagingDescription("MQ_MessageReadPropertyFilter")]
public System.Messaging.MessagePropertyFilter MessageReadPropertyFilter { get; set; }
[<System.ComponentModel.Browsable(false)>]
[<System.Messaging.MessagingDescription("MQ_MessageReadPropertyFilter")>]
member this.MessageReadPropertyFilter : System.Messaging.MessagePropertyFilter with get, set
Public Property MessageReadPropertyFilter As MessagePropertyFilter
Значение свойства
Объект MessagePropertyFilter, который очередь использует для фильтрации набора свойств, получаемого или считываемого ею для каждого сообщения.
- Атрибуты
Исключения
Значение фильтра — null
.
Примеры
В следующем примере кода используется для MessageReadPropertyFilter ограничения полученных свойств сообщения.
#using <system.dll>
#using <system.messaging.dll>
using namespace System;
using namespace System::Messaging;
ref class MyNewQueue
{
public:
//*************************************************
// Retrieves the default properties for a Message.
//*************************************************
void RetrieveDefaultProperties()
{
// Connect to a message queue.
MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
// Specify to retrieve the default properties only.
myQueue->MessageReadPropertyFilter->SetDefaults();
// Set the formatter for the Message.
array<Type^>^p = gcnew array<Type^>(1);
p[ 0 ] = String::typeid;
myQueue->Formatter = gcnew XmlMessageFormatter( p );
// Receive the first message in the queue.
Message^ myMessage = myQueue->Receive();
// Display selected properties.
Console::WriteLine( "Label: {0}", myMessage->Label );
Console::WriteLine( "Body: {0}", static_cast<String^>(myMessage->Body) );
return;
}
//*************************************************
// Retrieves all properties for a Message.
//*************************************************
void RetrieveAllProperties()
{
// Connect to a message queue.
MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
// Specify to retrieve all properties.
myQueue->MessageReadPropertyFilter->SetAll();
// Set the formatter for the Message.
array<Type^>^p = gcnew array<Type^>(1);
p[ 0 ] = String::typeid;
myQueue->Formatter = gcnew XmlMessageFormatter( p );
// Receive the first message in the queue.
Message^ myMessage = myQueue->Receive();
// Display selected properties.
Console::WriteLine( "Encryption algorithm: {0}", myMessage->EncryptionAlgorithm.ToString() );
Console::WriteLine( "Body: {0}", myMessage->Body );
return;
}
//*************************************************
// Retrieves application-specific properties for a
// Message.
//*************************************************
void RetrieveSelectedProperties()
{
// Connect to a message queue.
MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
// Specify to retrieve selected properties.
MessagePropertyFilter^ myFilter = gcnew MessagePropertyFilter;
myFilter->ClearAll();
// The following list is a random subset of available properties.
myFilter->Body = true;
myFilter->Label = true;
myFilter->MessageType = true;
myFilter->Priority = true;
myQueue->MessageReadPropertyFilter = myFilter;
// Set the formatter for the Message.
array<Type^>^p = gcnew array<Type^>(1);
p[ 0 ] = String::typeid;
myQueue->Formatter = gcnew XmlMessageFormatter( p );
// Receive the first message in the queue.
Message^ myMessage = myQueue->Receive();
// Display selected properties.
Console::WriteLine( "Message type: {0}", myMessage->MessageType.ToString() );
Console::WriteLine( "Priority: {0}", myMessage->Priority.ToString() );
return;
}
};
//*************************************************
// Provides an entry point into the application.
//
// This example retrieves specific groups of Message
// properties.
//*************************************************
int main()
{
// Create a new instance of the class.
MyNewQueue^ myNewQueue = gcnew MyNewQueue;
// Retrieve specific sets of Message properties.
myNewQueue->RetrieveDefaultProperties();
myNewQueue->RetrieveAllProperties();
myNewQueue->RetrieveSelectedProperties();
return 0;
}
using System;
using System.Messaging;
namespace MyProject
{
/// <summary>
/// Provides a container class for the example.
/// </summary>
public class MyNewQueue
{
//**************************************************
// Provides an entry point into the application.
//
// This example retrieves specific groups of Message
// properties.
//**************************************************
public static void Main()
{
// Create a new instance of the class.
MyNewQueue myNewQueue = new MyNewQueue();
// Retrieve specific sets of Message properties.
myNewQueue.RetrieveDefaultProperties();
myNewQueue.RetrieveAllProperties();
myNewQueue.RetrieveSelectedProperties();
return;
}
//**************************************************
// Retrieves the default properties for a Message.
//**************************************************
public void RetrieveDefaultProperties()
{
// Connect to a message queue.
MessageQueue myQueue = new MessageQueue(".\\myQueue");
// Specify to retrieve the default properties only.
myQueue.MessageReadPropertyFilter.SetDefaults();
// Set the formatter for the Message.
myQueue.Formatter = new XmlMessageFormatter(new Type[]
{typeof(String)});
// Receive the first message in the queue.
Message myMessage = myQueue.Receive();
// Display selected properties.
Console.WriteLine("Label: " + myMessage.Label);
Console.WriteLine("Body: " + (String)myMessage.Body);
return;
}
//**************************************************
// Retrieves all properties for a Message.
//**************************************************
public void RetrieveAllProperties()
{
// Connect to a message queue.
MessageQueue myQueue = new MessageQueue(".\\myQueue");
// Specify to retrieve all properties.
myQueue.MessageReadPropertyFilter.SetAll();
// Set the formatter for the Message.
myQueue.Formatter = new XmlMessageFormatter(new Type[]
{typeof(String)});
// Receive the first message in the queue.
Message myMessage = myQueue.Receive();
// Display selected properties.
Console.WriteLine("Encryption algorithm: " +
myMessage.EncryptionAlgorithm.ToString());
Console.WriteLine("Body: " + (String)myMessage.Body);
return;
}
//**************************************************
// Retrieves application-specific properties for a
// Message.
//**************************************************
public void RetrieveSelectedProperties()
{
// Connect to a message queue.
MessageQueue myQueue = new MessageQueue(".\\myQueue");
// Specify to retrieve selected properties.
MessagePropertyFilter myFilter = new
MessagePropertyFilter();
myFilter.ClearAll();
// The following list is a random subset of available properties.
myFilter.Body = true;
myFilter.Label = true;
myFilter.MessageType = true;
myFilter.Priority = true;
myQueue.MessageReadPropertyFilter = myFilter;
// Set the formatter for the Message.
myQueue.Formatter = new XmlMessageFormatter(new Type[]
{typeof(String)});
// Receive the first message in the queue.
Message myMessage = myQueue.Receive();
// Display selected properties.
Console.WriteLine("Message type: " +
myMessage.MessageType.ToString());
Console.WriteLine("Priority: " +
myMessage.Priority.ToString());
return;
}
}
}
Imports System.Messaging
Public Class MyNewQueue
' Provides an entry point into the application.
'
' This example retrieves specific groups of Message
' properties.
Public Shared Sub Main()
' Create a new instance of the class.
Dim myNewQueue As New MyNewQueue()
' Retrieve specific sets of Message properties.
myNewQueue.RetrieveDefaultProperties()
myNewQueue.RetrieveAllProperties()
myNewQueue.RetrieveSelectedProperties()
Return
End Sub
' Retrieves the default properties for a Message.
Public Sub RetrieveDefaultProperties()
' Connect to a message queue.
Dim myQueue As New MessageQueue(".\myQueue")
' Specify to retrieve the default properties only.
myQueue.MessageReadPropertyFilter.SetDefaults()
' Set the formatter for the Message.
myQueue.Formatter = New XmlMessageFormatter(New Type() _
{GetType([String])})
' Receive the first message in the queue.
Dim myMessage As Message = myQueue.Receive()
' Display selected properties.
Console.WriteLine(("Label: " + myMessage.Label))
Console.WriteLine(("Body: " + CType(myMessage.Body, _
[String])))
Return
End Sub
' Retrieves all properties for a Message.
Public Sub RetrieveAllProperties()
' Connect to a message queue.
Dim myQueue As New MessageQueue(".\myQueue")
' Specify to retrieve all properties.
myQueue.MessageReadPropertyFilter.SetAll()
' Set the formatter for the Message.
myQueue.Formatter = New XmlMessageFormatter(New Type() _
{GetType([String])})
' Receive the first message in the queue.
Dim myMessage As Message = myQueue.Receive()
' Display selected properties.
Console.WriteLine(("Encryption algorithm: " + _
myMessage.EncryptionAlgorithm.ToString()))
Console.WriteLine(("Body: " + CType(myMessage.Body, _
[String])))
Return
End Sub
' Retrieves application-specific properties for a
' Message.
Public Sub RetrieveSelectedProperties()
' Connect to a message queue.
Dim myQueue As New MessageQueue(".\myQueue")
' Specify to retrieve selected properties.
Dim myFilter As New MessagePropertyFilter()
myFilter.ClearAll()
' The following list is a random subset of properties.
myFilter.Body = True
myFilter.Label = True
myFilter.MessageType = True
myFilter.Priority = True
myQueue.MessageReadPropertyFilter = myFilter
' Set the formatter for the Message.
myQueue.Formatter = New XmlMessageFormatter(New Type() _
{GetType([String])})
' Receive the first message in the queue.
Dim myMessage As Message = myQueue.Receive()
' Display selected properties.
Console.WriteLine(("Message type: " + _
myMessage.MessageType.ToString()))
Console.WriteLine(("Priority: " + _
myMessage.Priority.ToString()))
Return
End Sub
End Class
Комментарии
Этот фильтр представляет собой набор логических значений, ограничивающих свойства сообщений, которые MessageQueue получает или просматривает. Когда объект MessageQueue получает или просматривает сообщение из очереди сервера, он получает только те свойства, для которых MessageReadPropertyFilter имеет значение true
.
Ниже приведены начальные MessageReadPropertyFilter значения свойств для свойства . Эти параметры идентичны вызову SetDefaultsMessagePropertyFilterдля .
Свойство. | Значение по умолчанию |
---|---|
Acknowledgment | false |
AcknowledgeType | false |
AdministrationQueue | true |
AppSpecific | false |
ArrivedTime | true |
AttachSenderId | false |
Authenticated | false |
AuthenticationProviderName | false |
AuthenticationProviderType | false |
Body | true |
ConnectorType | false |
CorrelationId | true |
DefaultBodySize | 1024 байта |
DefaultExtensionSize | 255 байт |
DefaultLabelSize | 255 байт |
DestinationQueue | false |
DestinationSymmetricKey | false |
DigitalSignature | false |
EncryptionAlgorithm | false |
Extension | false |
HashAlgorithm | false |
Id | true |
IsFirstInTransaction | false |
IsLastInTransaction | false |
Label | true |
MessageType | false |
Priority | false |
Recoverable | false |
ResponseQueue | true |
SenderCertificate | false |
SenderId | false |
SenderVersion | false |
SentTime | true |
SourceMachine | false |
TimeToBeReceived | false |
TimeToReachQueue | false |
TransactionId | false |
TransactionStatusQueue | false |
UseAuthentication | false |
UseDeadLetterQueue | false |
UseEncryption | false |
UseJournalQueue | false |
UseTracing | false |
В следующей таблице показано, доступно ли это свойство в различных режимах рабочей группы.
Режим рабочей группы | Доступно |
---|---|
Локальный компьютер | Да |
Имя локального компьютера и прямого формата | Да |
Удаленный компьютер | Да |
Имя удаленного компьютера и прямого формата | Да |