MessageQueue.GetMessageQueueEnumerator 方法

参考

定义

命名空间:: System.Messaging

程序集:: System.Messaging.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

为网络上公共队列的动态列表创建枚举数对象。

重载

GetMessageQueueEnumerator()	提供只进游标语义，以枚举网络上的所有公共队列。
GetMessageQueueEnumerator(MessageQueueCriteria)	提供只进游标语义，以枚举网络上满足指定判据的所有公共队列。

GetMessageQueueEnumerator()

提供只进游标语义，以枚举网络上的所有公共队列。

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

MessageQueueEnumerator

MessageQueueEnumerator，提供网络上所有公共消息队列的动态列表。

示例

下面的代码示例循环访问网络中的所有消息队列，并检查每个队列的路径。最后，它显示网络上的公共队列数。

#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

注解

此重载 GetMessageQueueEnumerator 返回网络上所有公共队列的枚举。

由于游标与动态列表相关联，因此枚举反映了对队列列表所做的任何修改，以便删除或添加到游标当前位置之外。不会反映游标当前位置之前添加或删除队列。例如，枚举器可以自动访问追加到游标位置之外但不能在该位置之前插入的队列。但是，可以通过调用 Reset MessageQueueEnumerator 来重置枚举，从而将光标移回列表的开头。

网络中没有定义的队列排序。枚举器不按计算机、标签、公共或专用状态或任何其他可访问条件对它们进行排序。

如果希望网络上的队列的静态快照，而不是与其建立动态连接，请调用 GetPublicQueues 或 GetPrivateQueuesByMachine(String)。这两种方法中的每个方法都返回一个对象数组，该数组 MessageQueue 表示调用该方法时队列。

下表显示了此方法是否在各种工作组模式下可用。

工作组模式	可用
本地计算机	否
本地计算机和直接格式名称	否
远程计算机	否
远程计算机和直接格式名称	否

另请参阅

适用于

GetMessageQueueEnumerator(MessageQueueCriteria)

提供只进游标语义，以枚举网络上满足指定判据的所有公共队列。

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

参数

criteria: MessageQueueCriteria

MessageQueueCriteria，包含用于筛选可用消息队列的判据。

MessageQueueEnumerator

MessageQueueEnumerator，提供网络上公共消息队列的动态列表，这些消息队列满足 criteria 参数指定的限制。

示例

下面的代码示例循环访问消息队列，并显示在最后一天创建的每个队列的路径，并且该路径存在于计算机“MyComputer”。

#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

注解

此重载 GetMessageQueueEnumerator 返回网络上满足应用程序条件定义的所有公共队列的列表。可以指定要包括的条件，例如，队列创建或修改时间、计算机名称、标签、类别或这些条件的任意组合。

由于游标与动态列表相关联，因此枚举反映了对超出游标当前位置的队列所做的任何修改。不会反映游标当前位置之前对队列所做的更改。例如，枚举器可以自动访问追加到游标位置之外的队列，但不能访问在该位置之前插入的队列。但是，可以通过调用 Reset MessageQueueEnumerator 来重置枚举，从而将光标移回列表的开头。

网络中没有已定义的队列排序。枚举器不按计算机、标签、公共或专用状态或任何其他可访问条件对它们进行排序。

如果需要网络上队列的静态快照，而不是与其建立动态连接，请指定或调用GetPrivateQueuesByMachine(String)的条件GetPublicQueues。这两种方法中的每个方法都返回一个对象数组，该数组 MessageQueue 表示调用该方法时队列。调用GetPublicQueuesByCategory(Guid)，GetPublicQueuesByLabel(String)或GetPublicQueuesByMachine(String)提供与调用GetPublicQueues相同的结果，以及分别使用筛选条件Category Label和MachineName/

下表显示了此方法是否在各种工作组模式下可用。

工作组模式	可用
本地计算机	否
本地计算机和直接格式名称	否
远程计算机	否
远程计算机和直接格式名称	否

另请参阅

适用于

MessageQueue.GetMessageQueueEnumerator 方法

定义

重载

GetMessageQueueEnumerator()

返回

示例

注解

另请参阅

适用于

GetMessageQueueEnumerator(MessageQueueCriteria)

参数

返回

示例

注解

另请参阅

适用于

其他资源