MessageQueue.GetMessageQueueEnumerator 方法

public:
 static System::Messaging::MessageQueueEnumerator ^ GetMessageQueueEnumerator();

public static System.Messaging.MessageQueueEnumerator GetMessageQueueEnumerator ();

static member GetMessageQueueEnumerator : unit -> System.Messaging.MessageQueueEnumerator

Public Shared Function GetMessageQueueEnumerator () As MessageQueueEnumerator

傳回

提供網路上所有公用訊息佇列動態清單的 MessageQueueEnumerator。

範例

下列程式代碼範例會逐一查看網路中的所有消息佇列，並檢查每個佇列的路徑。 最後，它會顯示網路上的公用佇列數目。

#using <System.dll>
#using <System.Messaging.dll>

using namespace System;
using namespace System::Messaging;

//**************************************************
// Iterates through message queues and examines the
// path for each queue. Also displays the number of
// public queues on the network.
//**************************************************
void ListPublicQueues()
{
   
   // Holds the count of private queues.
   int numberQueues = 0;
   
   // Get a cursor into the queues on the network.
   MessageQueueEnumerator^ myQueueEnumerator = MessageQueue::GetMessageQueueEnumerator();
   
   // Move to the next queue and read its path.
   while ( myQueueEnumerator->MoveNext() )
   {
      
      // Increase the count if priority is Lowest.
      Console::WriteLine( myQueueEnumerator->Current->Path );
      numberQueues++;
   }

   
   // Display final count.
   Console::WriteLine( "Number of public queues: {0}", numberQueues );
   return;
}


//**************************************************
// Provides an entry point into the application.
//   
// This example uses a cursor to step through the
// message queues and list the public queues on the
// network.
//**************************************************
int main()
{
   
   // Output the count of Lowest priority messages.
   ListPublicQueues();
}

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 uses a cursor to step through the
        // message queues and list the public queues on the
        // network.
        //**************************************************

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

            // Output the count of Lowest priority messages.
            myNewQueue.ListPublicQueues();
                        
            return;
        }

        //**************************************************
        // Iterates through message queues and examines the
        // path for each queue. Also displays the number of
        // public queues on the network.
        //**************************************************
        
        public void ListPublicQueues()
        {
            // Holds the count of private queues.
            uint numberQueues = 0;
    
            // Get a cursor into the queues on the network.
            MessageQueueEnumerator myQueueEnumerator =
                MessageQueue.GetMessageQueueEnumerator();

            // Move to the next queue and read its path.
            while(myQueueEnumerator.MoveNext())
            {
                // Increase the count if priority is Lowest.
                Console.WriteLine(myQueueEnumerator.Current.Path);
                numberQueues++;
            }

            // Display final count.
            Console.WriteLine("Number of public queues: " +
                numberQueues.ToString());
            
            return;
        }
    }
}

Imports System.Messaging



Public Class MyNewQueue


        
        ' Provides an entry point into the application.
        '		 
        ' This example uses a cursor to step through the
        ' message queues and list the public queues on the
        ' network.
        

        Public Shared Sub Main()

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

            ' Output the count of Lowest priority messages.
            myNewQueue.ListPublicQueues()

            Return

        End Sub


        
        ' Iterates through message queues and examines the
        ' path for each queue. Also displays the number of
        ' public queues on the network.
        

        Public Sub ListPublicQueues()

            ' Holds the count of private queues.
            Dim numberQueues As Int32 = 0

            ' Get a cursor into the queues on the network.
            Dim myQueueEnumerator As MessageQueueEnumerator = _
                MessageQueue.GetMessageQueueEnumerator()

            ' Move to the next queue and read its path.
            While myQueueEnumerator.MoveNext()
                ' Increase the count if the priority is Lowest.
                Console.WriteLine(myQueueEnumerator.Current.Path)
                numberQueues += 1
            End While

            ' Display final count.
            Console.WriteLine(("Number of public queues: " + _
                numberQueues.ToString()))

            Return

        End Sub

End Class

備註

這個的多 GetMessageQueueEnumerator 載會傳回網路上所有公用佇列的列舉。

因為數據指標與動態清單相關聯，所以列舉會反映對佇列清單所做的任何修改，以供刪除或新增至數據指標目前位置以外的佇列清單。 不會反映游標目前位置之前的新增或刪除佇列。 例如，列舉值可以自動存取附加在數據指標位置以外的佇列，但無法存取插入該位置之前插入的佇列。 不過，您可以藉由呼叫 ResetMessageQueueEnumerator來重設列舉，藉此將游標移回清單的開頭。

網路中沒有已定義的佇列順序。 列舉值不會依計算機、標籤、公用或私人狀態，或任何其他可存取準則來排序它們。

如果您要網路上佇列的靜態快照集，而不是與其動態連線，請呼叫 GetPublicQueues 或 GetPrivateQueuesByMachine(String)。 這兩種方法都會傳回 對象的陣列 MessageQueue ，代表呼叫 方法時佇列。

下表顯示此方法是否可在各種工作組模式中使用。

另請參閱

• GetPublicQueues()
• GetMessageEnumerator2()

public:
 static System::Messaging::MessageQueueEnumerator ^ GetMessageQueueEnumerator(System::Messaging::MessageQueueCriteria ^ criteria);

public static System.Messaging.MessageQueueEnumerator GetMessageQueueEnumerator (System.Messaging.MessageQueueCriteria criteria);

static member GetMessageQueueEnumerator : System.Messaging.MessageQueueCriteria -> System.Messaging.MessageQueueEnumerator

Public Shared Function GetMessageQueueEnumerator (criteria As MessageQueueCriteria) As MessageQueueEnumerator

參數

傳回

提供網路上所有公用訊息佇列動態清單的 MessageQueueEnumerator，其符合 criteria 參數指定的限制。

範例

下列程式代碼範例會逐一查看消息佇列，並顯示過去一天建立且存在於計算機 “MyComputer” 上之每個佇列的路徑。

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

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

   // Iterates through message queues and displays the
   // path of each queue that was created in the last
   // day and that exists on the computer "MyComputer". 
   void ListPublicQueuesByCriteria()
   {
      UInt32 numberQueues = 0;
      
      // Specify the criteria to filter by.
      MessageQueueCriteria^ myCriteria = gcnew MessageQueueCriteria;
      myCriteria->MachineName = "MyComputer";
      myCriteria->CreatedAfter = DateTime::Now.Subtract( TimeSpan(1,0,0,0) );
      
      // Get a cursor into the queues on the network.
      MessageQueueEnumerator^ myQueueEnumerator = MessageQueue::GetMessageQueueEnumerator( myCriteria );
      
      // Move to the next queue and read its path.
      while ( myQueueEnumerator->MoveNext() )
      {
         
         // Increase the count if priority is Lowest.
         Console::WriteLine( myQueueEnumerator->Current->Path );
         numberQueues++;
      }

      
      // Handle no queues matching the criteria.
      if ( numberQueues == 0 )
      {
         Console::WriteLine( "No public queues match criteria." );
      }

      return;
   }

};

int main()
{
   
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;
   
   // Output the count of Lowest priority messages.
   myNewQueue->ListPublicQueuesByCriteria();
   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 uses a cursor to step through the
        // message queues and list the public queues on the
        // network that specify certain criteria.
        //**************************************************

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

            // Output the count of Lowest priority messages.
            myNewQueue.ListPublicQueuesByCriteria();
                        
            return;
        }

        //**************************************************
        // Iterates through message queues and displays the
        // path of each queue that was created in the last
        // day and that exists on the computer "MyComputer".
        //**************************************************
        
        public void ListPublicQueuesByCriteria()
        {
            uint numberQueues = 0;
            
            // Specify the criteria to filter by.
            MessageQueueCriteria myCriteria = new
                MessageQueueCriteria();
            myCriteria.MachineName = "MyComputer";
            myCriteria.CreatedAfter = DateTime.Now.Subtract(new
                TimeSpan(1,0,0,0));

            // Get a cursor into the queues on the network.
            MessageQueueEnumerator myQueueEnumerator =
                MessageQueue.GetMessageQueueEnumerator(myCriteria);

            // Move to the next queue and read its path.
            while(myQueueEnumerator.MoveNext())
            {
                // Increase the count if priority is Lowest.
                Console.WriteLine(myQueueEnumerator.Current.Path);
                numberQueues++;
            }

            // Handle no queues matching the criteria.
            if (numberQueues == 0)
            {
                Console.WriteLine("No public queues match criteria.");
            }

            return;
        }
    }
}

Imports System.Messaging

 
Public Class MyNewQueue


        '
        ' Provides an entry point into the application.
        '		 
        ' This example uses a cursor to step through the
        ' message queues and list the public queues on the
        ' network that specify certain criteria.
        

        Public Shared Sub Main()

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

            ' Output the count of Lowest priority messages.
            myNewQueue.ListPublicQueuesByCriteria()

            Return

        End Sub


        
        ' Iterates through message queues and displays the
        ' path of each queue that was created in the last
        ' day and that exists on the computer "MyComputer". 
        

        Public Sub ListPublicQueuesByCriteria()

            Dim numberQueues As Int32 = 0

            ' Specify the criteria to filter by.
            Dim myCriteria As New MessageQueueCriteria()
            myCriteria.MachineName = "MyComputer"
            myCriteria.CreatedAfter = DateTime.Now.Subtract(New _
                TimeSpan(1, 0, 0, 0))


            ' Get a cursor into the queues on the network.
            Dim myQueueEnumerator As MessageQueueEnumerator = _
                MessageQueue.GetMessageQueueEnumerator(myCriteria)

            ' Move to the next queue and read its path.
            While myQueueEnumerator.MoveNext()
                ' Increase the count if the priority is Lowest.
                Console.WriteLine(myQueueEnumerator.Current.Path)
                numberQueues += 1
            End While

            ' Handle no queues matching the criteria.
            If numberQueues = 0 Then
                Console.WriteLine("No queues match the criteria.")
            End If

            Return

        End Sub

End Class

備註

這個的多 GetMessageQueueEnumerator 載會傳回網路上所有符合應用程式準則中所定義準則的公用佇列清單。 您可以指定要包含的準則，例如佇列建立或修改時間、計算機名稱、標籤、類別或任何組合。

由於數據指標與動態清單相關聯，因此列舉會反映對超出數據指標目前位置之佇列所做的任何修改。 數據指標目前位置之前的佇列變更不會反映。 例如，列舉值可以自動存取附加在數據指標位置以外的佇列，但無法存取插入該位置之前插入的佇列。 不過，您可以藉由呼叫 ResetMessageQueueEnumerator來重設列舉，藉此將游標移回清單的開頭。

網路中沒有已定義的佇列順序。 列舉值不會依計算機、標籤、公用或私人狀態，或任何其他可存取準則來排序它們。

如果您想要網路上佇列的靜態快照集，而不是與其動態連線，請指定或呼叫GetPrivateQueuesByMachine(String)的GetPublicQueues準則。 這兩種方法都會傳回 對象的陣列 MessageQueue ，代表呼叫 方法時佇列。 呼叫GetPublicQueuesByCategory(Guid)、 GetPublicQueuesByLabel(String)或 GetPublicQueuesByMachine(String) 提供與分別使用、 Label和 MachineName篩選準則Category呼叫GetPublicQueues相同的結果。

下表顯示此方法是否可在各種工作組模式中使用。

另請參閱

• GetPublicQueues()
• GetMessageEnumerator2()