MessageQueue.DefaultPropertiesToSend 屬性

參考

定義

命名空間:: System.Messaging

組件:: System.Messaging.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

取得或設定應用程式傳送訊息至佇列時，會預設採用的訊息屬性值。

public:
 property System::Messaging::DefaultPropertiesToSend ^ DefaultPropertiesToSend { System::Messaging::DefaultPropertiesToSend ^ get(); void set(System::Messaging::DefaultPropertiesToSend ^ value); };

[System.ComponentModel.Browsable(false)]
[System.Messaging.MessagingDescription("MQ_DefaultPropertiesToSend")]
public System.Messaging.DefaultPropertiesToSend DefaultPropertiesToSend { get; set; }

[<System.ComponentModel.Browsable(false)>]
[<System.Messaging.MessagingDescription("MQ_DefaultPropertiesToSend")>]
member this.DefaultPropertiesToSend : System.Messaging.DefaultPropertiesToSend with get, set

Public Property DefaultPropertiesToSend As DefaultPropertiesToSend

屬性值

DefaultPropertiesToSend

DefaultPropertiesToSend，包含應用程式向佇列傳送 Message 執行個體以外的物件時，使用的預設 Message Queuing 訊息屬性值。

屬性: BrowsableAttribute MessagingDescriptionAttribute

例外狀況

ArgumentException

無法設定佇列的預設屬性，可能是因為其中一個屬性無效。

範例

下列程式代碼範例會使用訊息的優先順序來判斷要傳送訊息的預設屬性。

#using <system.dll>
#using <system.messaging.dll>

using namespace System;
using namespace System::Messaging;
ref class MyNewQueue
{
public:

   // Associates selected message property values
   // with high priority messages.
   void SendHighPriorityMessages()
   {
      
      // Connect to a message queue.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
      
      // Associate selected default property values with high
      // priority messages.
      myQueue->DefaultPropertiesToSend->Priority = MessagePriority::High;
      myQueue->DefaultPropertiesToSend->Label = "High Priority Message";
      myQueue->DefaultPropertiesToSend->Recoverable = true;
      myQueue->DefaultPropertiesToSend->TimeToReachQueue = TimeSpan(0,0,30);
      
      // Send messages using these defaults.
      myQueue->Send( "High priority message data 1." );
      myQueue->Send( "High priority message data 2." );
      myQueue->Send( "High priority message data 3." );
      return;
   }


   // Associates selected message property values
   // with normal priority messages.
   void SendNormalPriorityMessages()
   {
      
      // Connect to a message queue.
      MessageQueue^ myQueue = gcnew MessageQueue( ".\\myQueue" );
      
      // Associate selected default property values with normal
      // priority messages.
      myQueue->DefaultPropertiesToSend->Priority = MessagePriority::Normal;
      myQueue->DefaultPropertiesToSend->Label = "Normal Priority Message";
      myQueue->DefaultPropertiesToSend->Recoverable = false;
      myQueue->DefaultPropertiesToSend->TimeToReachQueue = TimeSpan(0,2,0);
      
      // Send messages using these defaults.
      myQueue->Send( "Normal priority message data 1." );
      myQueue->Send( "Normal priority message data 2." );
      myQueue->Send( "Normal priority message data 3." );
      return;
   }

};


// Provides an entry point into the application.
// This example specifies different types of default
// properties for messages.
int main()
{
   
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;
   
   // Send normal and high priority messages.
   myNewQueue->SendNormalPriorityMessages();
   myNewQueue->SendHighPriorityMessages();
   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 specifies different types of default
        // properties for messages.
        //**************************************************

        public static void Main()
        {
            // Create a new instance of the class.
            MyNewQueue myNewQueue = new MyNewQueue();

            // Send normal and high priority messages.
            myNewQueue.SendNormalPriorityMessages();
            myNewQueue.SendHighPriorityMessages();
                        
            return;
        }

        //**************************************************
        // Associates selected message property values
        // with high priority messages.
        //**************************************************
        
        public void SendHighPriorityMessages()
        {

            // Connect to a message queue.
            MessageQueue myQueue = new
                MessageQueue(".\\myQueue");

            // Associate selected default property values with high
            // priority messages.
            myQueue.DefaultPropertiesToSend.Priority =
                MessagePriority.High;
            myQueue.DefaultPropertiesToSend.Label =
                "High Priority Message";
            myQueue.DefaultPropertiesToSend.Recoverable = true;
            myQueue.DefaultPropertiesToSend.TimeToReachQueue =
                new TimeSpan(0,0,30);
            
            // Send messages using these defaults.
            myQueue.Send("High priority message data 1.");
            myQueue.Send("High priority message data 2.");
            myQueue.Send("High priority message data 3.");
            
            return;
        }

        //**************************************************
        // Associates selected message property values
        // with normal priority messages.
        //**************************************************
        
        public void SendNormalPriorityMessages()
        {

            // Connect to a message queue.
            MessageQueue myQueue = new MessageQueue(".\\myQueue");

            // Associate selected default property values with normal
            // priority messages.
            myQueue.DefaultPropertiesToSend.Priority =
                MessagePriority.Normal;
            myQueue.DefaultPropertiesToSend.Label =
                "Normal Priority Message";
            myQueue.DefaultPropertiesToSend.Recoverable = false;
            myQueue.DefaultPropertiesToSend.TimeToReachQueue =
                new TimeSpan(0,2,0);
            
            // Send messages using these defaults.
            myQueue.Send("Normal priority message data 1.");
            myQueue.Send("Normal priority message data 2.");
            myQueue.Send("Normal priority message data 3.");
            
            return;
        }
    }
}

Imports System.Messaging

Public Class MyNewQueue



        ' Provides an entry point into the application.
        '		 
        ' This example specifies different types of default
        ' properties for messages.


        Public Shared Sub Main()

            ' Create a new instance of the class.
            Dim myNewQueue As New MyNewQueue()

            ' Send normal and high priority messages.
            myNewQueue.SendNormalPriorityMessages()
            myNewQueue.SendHighPriorityMessages()

            Return

        End Sub



        ' Associates selected message property values
        ' with high priority messages.
 

        Public Sub SendHighPriorityMessages()

            ' Connect to a message queue.
            Dim myQueue As New MessageQueue(".\myQueue")

            ' Associate selected default property values with high
            ' priority messages.
            myQueue.DefaultPropertiesToSend.Priority = _
                MessagePriority.High
            myQueue.DefaultPropertiesToSend.Label = _
                "High Priority Message"
            myQueue.DefaultPropertiesToSend.Recoverable = True
            myQueue.DefaultPropertiesToSend.TimeToReachQueue = _
                New TimeSpan(0, 0, 30)

            ' Send messages using these defaults.
            myQueue.Send("High priority message data 1.")
            myQueue.Send("High priority message data 2.")
            myQueue.Send("High priority message data 3.")

            Return

        End Sub



        ' Associates selected message property values
        ' with normal priority messages.

        Public Sub SendNormalPriorityMessages()

            ' Connect to a message queue.
            Dim myQueue As New MessageQueue(".\myQueue")

            ' Associate selected default property values with normal
            ' priority messages.
            myQueue.DefaultPropertiesToSend.Priority = _
                MessagePriority.Normal
            myQueue.DefaultPropertiesToSend.Label = _
                "Normal Priority Message"
            myQueue.DefaultPropertiesToSend.Recoverable = False
            myQueue.DefaultPropertiesToSend.TimeToReachQueue = _
                New TimeSpan(0, 2, 0)

            ' Send messages using these defaults.
            myQueue.Send("Normal priority message data 1.")
            myQueue.Send("Normal priority message data 2.")
            myQueue.Send("Normal priority message data 3.")

            Return

        End Sub

End Class

備註

當您將類型不是 Message 的任何物件傳送至佇列時，會將 MessageQueue 物件插入消息佇列訊息中。此時， MessageQueue 會套用至您在屬性中指定的屬性值訊息 DefaultPropertiesToSend 。相反地，如果您將傳送 Message 至佇列，這些屬性已經針對實例本身指定，因此 DefaultPropertiesToSend 會忽略 Message。

雖然您可以透過 MessageQueue 物件設定屬性，但 DefaultPropertiesToSend 會參考傳送至佇列之訊息的屬性，而不是佇列本身。

下表顯示屬性的預設值。

屬性	預設值
AcknowledgeType	`AcknowledgeType.None`
AdministrationQueue	`null`
AppSpecific	零 (0)
AttachSenderId	`true`
EncryptionAlgorithm	`EncryptionAlgorithm.RC2`
Extension	位元組的長度為零的陣列
HashAlgorithm	`HashAlgorithm.MD5`
Label	空字串 (“)
Priority	`MessagePriority.Normal`
Recoverable	`false`
ResponseQueue	`null`
TimeToBeReceived	`Message.InfiniteTimeout`
TimeToReachQueue	`Message.InfiniteTimeout`
TransactionStatusQueue	`null`
UseAuthentication	`false`
UseDeadLetterQueue	`false`
UseEncryption	`false`
UseJournalQueue	`false`
UseTracing	`false`

下表顯示此屬性是否可在各種工作組模式中使用。

工作組模式	可用
本機電腦	是
本機計算機和直接格式名稱	是
遠端電腦	是
遠端電腦和直接格式名稱	是

適用於

共用方式為

MessageQueue.DefaultPropertiesToSend 屬性

定義

屬性值

例外狀況

範例

備註

適用於

另請參閱

其他資源