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MessageQueue.Create Method

  • Reference

Definition

Namespace:
System.Messaging
Assembly:
System.Messaging.dll

Creates a new queue at the specified path on a Message Queuing server.

Overloads

Create(String)

Creates a non-transactional Message Queuing queue at the specified path.
Create(String, Boolean)

Creates a transactional or non-transactional Message Queuing queue at the specified path.

Create(String)

Creates a non-transactional Message Queuing queue at the specified path.

public:
 static System::Messaging::MessageQueue ^ Create(System::String ^ path);
public static System.Messaging.MessageQueue Create (string path);
static member Create : string -> System.Messaging.MessageQueue
Public Shared Function Create (path As String) As MessageQueue

Parameters

path
String

The path of the queue to create.

Returns

MessageQueue

A MessageQueue that represents the new queue.

Exceptions

ArgumentException

The path parameter is null or is an empty string ("").

MessageQueueException

A queue already exists at the specified path.

-or-

An error occurred when accessing a Message Queuing method.

Examples

The following code example creates public and private queues. It sends a message to selected queues.

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

using namespace System;
using namespace System::Messaging;

// This example creates new public and private queues.
ref class MyNewQueue
{
public:
   void CreatePublicQueues()
   {
      
      // Create and connect to a public Message Queuing queue.
      if (  !MessageQueue::Exists( ".\\newPublicQueue" ) )
      {
         
         // Create the queue if it does not exist.
         MessageQueue^ myNewPublicQueue = MessageQueue::Create( ".\\newPublicQueue" );
         
         // Send a message to the queue.
         myNewPublicQueue->Send( "My message data." );
      }

      
      // Create (but do not connect to) a second public queue.
      if (  !MessageQueue::Exists( ".\\newPublicResponseQueue" ) )
      {
         MessageQueue::Create( ".\\newPublicResponseQueue" );
      }

      return;
   }


   // Creates private queues and sends a message.
   void CreatePrivateQueues()
   {
      
      // Create and connect to a private Message Queuing queue.
      if (  !MessageQueue::Exists( ".\\Private$\\newPrivQueue" ) )
      {
         
         // Create the queue if it does not exist.
         MessageQueue^ myNewPrivateQueue = MessageQueue::Create( ".\\Private$\\newPrivQueue" );
         
         // Send a message to the queue.
         myNewPrivateQueue->Send( "My message data." );
      }

      
      // Create (but do not connect to) a second private queue.
      if (  !MessageQueue::Exists( ".\\Private$\\newResponseQueue" ) )
      {
         MessageQueue::Create( ".\\Private$\\newResponseQueue" );
      }

      return;
   }

};


// Provides an entry point into the application.
int main()
{
   
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;
   
   // Create public and private queues.
   myNewQueue->CreatePublicQueues();
   myNewQueue->CreatePrivateQueues();
   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 creates new public and private
        // queues.
        //**************************************************

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

            // Create public and private queues.
            myNewQueue.CreatePublicQueues();
            myNewQueue.CreatePrivateQueues();

            return;
        }

        //**************************************************
        // Creates public queues and sends a message.
        //**************************************************
        
        public void CreatePublicQueues()
        {

            // Create and connect to a public Message Queuing queue.
            if (!MessageQueue.Exists(".\\newPublicQueue"))
            {
                // Create the queue if it does not exist.
                MessageQueue myNewPublicQueue =
                    MessageQueue.Create(".\\newPublicQueue");

                // Send a message to the queue.
                myNewPublicQueue.Send("My message data.");
            }

            // Create (but do not connect to) a second public queue.
            if (!MessageQueue.Exists(".\\newPublicResponseQueue"))
            {
                MessageQueue.Create(".\\newPublicResponseQueue");
            }

            return;
        }

        //**************************************************
        // Creates private queues and sends a message.
        //**************************************************
        
        public void CreatePrivateQueues()
        {

            // Create and connect to a private Message Queuing queue.
            if (!MessageQueue.Exists(".\\Private$\\newPrivQueue"))
            {
                // Create the queue if it does not exist.
                MessageQueue myNewPrivateQueue =
                    MessageQueue.Create(".\\Private$\\newPrivQueue");

                // Send a message to the queue.
                myNewPrivateQueue.Send("My message data.");
            }

            // Create (but do not connect to) a second private queue.
            if (!MessageQueue.Exists(".\\Private$\\newResponseQueue"))
            {
                MessageQueue.Create(".\\Private$\\newResponseQueue");
            }
        
            return;
        }
    }
}

Imports System.Messaging

' Provides a container class for the example.

Public Class MyNewQueue


  
        ' Provides an entry point into the application.
        '		 
        ' This example creates new public and private 
        ' queues.
 

        Public Shared Sub Main()

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

            ' Create public and private queues.
            myNewQueue.CreatePublicQueues()
            myNewQueue.CreatePrivateQueues()

            Return

        End Sub


 
        ' Creates public queues and sends a message.
 

        Public Sub CreatePublicQueues()

            ' Create and connect to a public Message Queuing queue.
            If Not MessageQueue.Exists(".\newPublicQueue") Then
                ' Create the queue if it does not exist.
                Dim myNewPublicQueue As MessageQueue = _
                    MessageQueue.Create(".\newPublicQueue")

                ' Send a message to the queue.
                myNewPublicQueue.Send("My message data.")
            End If

            ' Create (but do not connect to) a second public queue.
            If Not MessageQueue.Exists(".\newPublicResponseQueue") _
                Then

                MessageQueue.Create(".\newPublicResponseQueue")
            End If

            Return

        End Sub



        ' Creates private queues and sends a message.


        Public Sub CreatePrivateQueues()

            ' Create and connect to a private Message Queuing queue.
            If Not MessageQueue.Exists(".\Private$\newPrivateQueue") _
                Then

                ' Create the queue if it does not exist.
                Dim myNewPrivateQueue As MessageQueue = _
                    MessageQueue.Create(".\Private$\newPrivateQueue")

                ' Send a message to the queue.
                myNewPrivateQueue.Send("My message data.")
            End If

            ' Create (but do not connect to) a second private queue.
            If Not MessageQueue.Exists(".\Private$\newResponseQueue") _
                Then

                MessageQueue.Create(".\Private$\newResponseQueue")
            End If

            Return

        End Sub

End Class

Remarks

Use this overload to create a non-transactional Message Queuing queue.

To create a new instance of the MessageQueue class in your application and bind it to an existing queue, use the MessageQueue constructor. To create a new queue in Message Queuing, call Create(String).

The syntax for the path parameter depends on the type of queue it references, as shown in the following table.

Queue type Syntax
Public queue MachineName\QueueName
Private queue MachineName\Private$\QueueName

Use "." for the local computer. For more syntax, see the Path property.

The following table shows whether this method is available in various Workgroup modes.

Workgroup mode Available
Local computer Yes
Local computer and direct format name Yes
Remote computer No
Remote computer and direct format name No

See also

Applies to

Create(String, Boolean)

Creates a transactional or non-transactional Message Queuing queue at the specified path.

public:
 static System::Messaging::MessageQueue ^ Create(System::String ^ path, bool transactional);
public static System.Messaging.MessageQueue Create (string path, bool transactional);
static member Create : string * bool -> System.Messaging.MessageQueue
Public Shared Function Create (path As String, transactional As Boolean) As MessageQueue

Parameters

path
String

The path of the queue to create.

transactional
Boolean

true to create a transactional queue; false to create a non-transactional queue.

Returns

MessageQueue

A MessageQueue that represents the new queue.

Exceptions

ArgumentException

The path parameter is null or is an empty string ("").

MessageQueueException

A queue already exists at the specified path.

-or-

An error occurred when accessing a Message Queuing method.

Examples

The following code example creates public and private transactional queues. It sends a message to selected queues.

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

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

   // Creates public transactional queues and sends a 
   // message.
   void CreatePublicTransactionalQueues()
   {
      
      // Create and connect to a public message Queuing queue.
      if (  !MessageQueue::Exists( ".\\newPublicTransQueue1" ) )
      {
         
         // Create the queue if it does not exist.
         MessageQueue::Create( ".\\newPublicTransQueue1", true );
      }

      
      // Connect to the queue.
      MessageQueue^ myNewPublicQueue = gcnew MessageQueue( ".\\newPublicTransQueue1" );
      
      // Create a transaction.
      MessageQueueTransaction^ myTransaction = gcnew MessageQueueTransaction;
      
      // Begin the transaction.
      myTransaction->Begin();
      
      // Send the message.
      myNewPublicQueue->Send( "My Message Data.", myTransaction );
      
      // Commit the transaction.
      myTransaction->Commit();
      if (  !MessageQueue::Exists( ".\\newPublicTransQueue2" ) )
      {
         
         // Create (but do not connect to) second public queue
         MessageQueue::Create( ".\\newPublicTransQueue2", true );
      }

      return;
   }


   // Creates private queues and sends a message.
   void CreatePrivateTransactionalQueues()
   {
      
      // Create and connect to a private Message Queuing queue.
      if (  !MessageQueue::Exists( ".\\Private$\\newPrivTransQ1" ) )
      {
         
         // Create the queue if it does not exist.
         MessageQueue^ myNewPrivateQueue = MessageQueue::Create( ".\\Private$\\newPrivTransQ1", true );
      }

      
      // Connect to the queue.
      MessageQueue^ myNewPrivateQueue = gcnew MessageQueue( ".\\Private$\\newPrivTransQ1" );
      
      // Create a transaction.
      MessageQueueTransaction^ myTransaction = gcnew MessageQueueTransaction;
      
      // Begin the transaction.
      myTransaction->Begin();
      
      // Send the message.
      myNewPrivateQueue->Send( "My Message Data.", myTransaction );
      
      // Commit the transaction.
      myTransaction->Commit();
      
      // Create (but do not connect to) a second private queue.
      if (  !MessageQueue::Exists( ".\\Private$\\newPrivTransQ2" ) )
      {
         MessageQueue::Create( ".\\Private$\\newPrivTransQ2", true );
      }

      return;
   }

};


// Provides an entry point into the application.
// This example creates new transactional queues.
int main()
{
   
   // Create a new instance of the class.
   MyNewQueue^ myNewQueue = gcnew MyNewQueue;
   
   // Create transactional queues.
   myNewQueue->CreatePublicTransactionalQueues();
   myNewQueue->CreatePrivateTransactionalQueues();
   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 creates new transactional queues.
        //**************************************************

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

            // Create transactional queues.
            myNewQueue.CreatePublicTransactionalQueues();
            myNewQueue.CreatePrivateTransactionalQueues();

            return;
        }

        //**************************************************
        // Creates public transactional queues and sends a
        // message.
        //**************************************************
        
        public void CreatePublicTransactionalQueues()
        {

            // Create and connect to a public Message Queuing queue.
            if (!MessageQueue.Exists(".\\newPublicTransQueue1"))
            {
                // Create the queue if it does not exist.
                MessageQueue.Create(".\\newPublicTransQueue1", true);
            }

            // Connect to the queue.
            MessageQueue myNewPublicQueue =
                new MessageQueue(".\\newPublicTransQueue1");

            // Send a message to the queue.
            // Create a transaction.
            MessageQueueTransaction myTransaction = new
                MessageQueueTransaction();

            // Begin the transaction.
            myTransaction.Begin();

            // Send the message.
            myNewPublicQueue.Send("My Message Data.", myTransaction);

            // Commit the transaction.
            myTransaction.Commit();

            if (!MessageQueue.Exists(".\\newPublicTransQueue2"))
            {
                // Create (but do not connect to) second public queue.
                MessageQueue.Create(".\\newPublicTransQueue2", true);
            }

            return;
        }

        //**************************************************
        // Creates private queues and sends a message.
        //**************************************************
        
        public void CreatePrivateTransactionalQueues()
        {

            // Create and connect to a private Message Queuing queue.
            if (!MessageQueue.Exists(".\\Private$\\newPrivTransQ1"))
            {
                // Create the queue if it does not exist.
                MessageQueue.Create(".\\Private$\\newPrivTransQ1", true);
            }

            // Connect to the queue.
            MessageQueue myNewPrivateQueue =
                new MessageQueue(".\\Private$\\newPrivTransQ1");

            // Send a message to the queue.
            // Create a transaction.
            MessageQueueTransaction myTransaction = new
                MessageQueueTransaction();

            // Begin the transaction.
            myTransaction.Begin();

            // Send the message.
            myNewPrivateQueue.Send("My Message Data.", myTransaction);

            // Commit the transaction.
            myTransaction.Commit();

            // Create (but do not connect to) a second private queue.
            if (!MessageQueue.Exists(".\\Private$\\newPrivTransQ2"))
            {
                MessageQueue.Create(".\\Private$\\newPrivTransQ2",
                    true);
            }

            return;
        }
    }
}

Imports System.Messaging

Public Class MyNewQueue



        ' Provides an entry point into the application.
        '		 
        ' This example creates new transactional queues.


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

            ' Create transactional queues.
            myNewQueue.CreatePublicTransactionalQueues()
            myNewQueue.CreatePrivateTransactionalQueues()

            Return

        End Sub



        ' Creates public transactional queues and sends a 
        ' message.
 

        Public Sub CreatePublicTransactionalQueues()

            ' Create and connect to a public Message Queuing queue.
            If Not MessageQueue.Exists(".\newPublicTransQueue1") Then

                ' Create the queue if it does not exist.
                MessageQueue.Create(".\newPublicTransQueue1", True)

            End If

            ' Connect to the queue.
            Dim myNewPublicQueue As New MessageQueue(".\newPublicTransQueue1")

            ' Create a transaction.
            Dim myTransaction As New MessageQueueTransaction

            ' Begin the transaction.
            myTransaction.Begin()

            ' Send the message.
            myNewPublicQueue.Send("My Message Data.", myTransaction)

            ' Commit the transaction.
            myTransaction.Commit()

            If Not MessageQueue.Exists(".\newPublicTransQueue2") Then

                ' Create (but do not connect to) a second queue.
                MessageQueue.Create(".\newPublicTransQueue2", True)
            End If

            Return

        End Sub



        ' Creates private queues and sends a message.


        Public Sub CreatePrivateTransactionalQueues()

            ' Create and connect to a private Message Queuing queue.
            If Not MessageQueue.Exists(".\Private$\newPrivTransQ1") _
                Then

                ' Create the queue if it does not exist.
                MessageQueue.Create(".\Private$\newPrivTransQ1", True)

            End If

            ' Connect to the queue.
            Dim myNewPrivateQueue As New MessageQueue(".\Private$\newPrivTransQ1")

            ' Create a transaction.
            Dim myTransaction As New MessageQueueTransaction

            ' Begin the transaction.
            myTransaction.Begin()

            ' Send the message.
            myNewPrivateQueue.Send("My Message Data.", myTransaction)

            ' Commit the transaction.
            myTransaction.Commit()

            ' Create (but do not connect to) a second private queue.
            If Not MessageQueue.Exists(".\Private$\newPrivTransQ2") _
                Then

                MessageQueue.Create(".\Private$\newPrivTransQ2", True)
            End If

            Return

        End Sub

End Class

Remarks

You can use this overload to create a transactional queue in Message Queuing. You can create a non-transactional queue, by setting the transactional parameter to false or by calling the other overload of Create(String).

To create a new instance of the MessageQueue class in your application and bind it to an existing queue, use the MessageQueue constructor. To create a new queue in Message Queuing, call Create(String).

The syntax for the path parameter depends on the type of queue it references, as shown in the following table.

Queue type Syntax
Public queue MachineName\QueueName
Private queue MachineName\Private$\QueueName

Use "." for the local computer. For more syntax, see the Path property.

The following table shows whether this method is available in various Workgroup modes.

Workgroup mode Available
Local computer Yes
Local computer and direct format name Yes
Remote computer No
Remote computer and direct format name No

See also

Applies to