MSMQ explore(one)

 •Introduction

•It's like emailing!

•A quick start sample

•Message Queue Management

•Sending Messages

•The Message Object

•Dead Letter Queue and Acknowledge Types

•Receiving Messages

•Using Transactions
Introduction 
      IPC(inter-process communication)

A set of techniques for the exchange of data between two or more threads in one or more processes. Processes may be running on one computer or on two or more computers connected by a network
    Approach

Exchange files via a network share。

   Custom socket

.NET Remoting and Web Services

Message Queue

Remoting/Web Service VS. Message Queue
Robustness

Message prioritization

Offline capabilities

Transactional messaging

Security
       Microsoft's Message Queuing (MSMQ) is such a message server and is part of the Windows Server operating system。 

Originally MSMQ came with a native, COM-based programming interface. But Microsoft has added a.NET wrapper on top of it which makes the development of MSMQ-based systems quite easier The first version of MSMQ was delivered with Windows NT 4.0; now Windows XP/2003 brings the newest version (3.0), provding several interesting new features. 
it's like email:

A quick start sample

using System;
using System.Messaging;

namespace WindowsApplication3
{
    class MsmQuickstart
    {
        [STAThread]
        public static void Main(string[] args)
        {
            // SendMessage();
            
            // Foo();

             Bar();

            Console.WriteLine("Press Enter to exit.");
            Console.ReadLine();
        }

        private static void SendMessage()
        {
            // (1) path to message queue
            // Syntax: [computer name]\private$\[queue name]
            // use ".' for localhost
            string queuePath = @".\private$\TSS_MsmqTest";

            // (2) open message queue, create new one if not exists
            MessageQueue messageQueue;
            if (MessageQueue.Exists(queuePath))
            {
                messageQueue = new MessageQueue(queuePath);
            }
            else
            {
                messageQueue = MessageQueue.Create(queuePath);
            }

            Console.WriteLine("Message Queue is ready.");

            // (3) send simple message
            messageQueue.Send("Hello World!");

            // (4) break here and have a look in you messaeg queue!!
            // System.Diagnostics.Debugger.Break();
            Console.ReadLine();

            // (5) reveive message from message queue
            Message message = messageQueue.Receive();
            string myMessage = Convert.ToString(message.Body);
            Console.WriteLine(myMessage);

            // (6) Close message queue
            messageQueue.Close();
        }

        private static void Foo()
        {
            // (1) path to message queue
            string queuePath = @".\private$\TSS_MsmqTest_QueueAdministration";

            // (2) create new queue
            MessageQueue.Create(queuePath);

            // (3) check if queue exists
            bool queueExists = MessageQueue.Exists(queuePath);

            // (4) Remove all message from queue
            MessageQueue messageQueueA = new MessageQueue(queuePath);
            Console.WriteLine("Message Queue is ready.");

            messageQueueA.Send("Hello World!");
            messageQueueA.Purge();
            messageQueueA.Close();

            // (5) delete existing message queue
            Console.ReadLine();
            MessageQueue.Delete(queuePath);

            // (6) set permissions to message queue
            /*
            MessageQueue messageQueueB = new MessageQueue(queuePath);
            messageQueueB.SetPermissions("Rocket Liu", MessageQueueAccessRights.ReceiveMessage);
            messageQueueB.Close();
            */
        }

        private static void Bar()
        {
            // (1) define message pathes
            string queuePath = @".\private$\TSS_MsmqTest";
            string queuePathAdmin = @".\private$\TSS_MsmqTest_QueueAdministration";

            // (2) Create message object and set properties
            Message message = new Message();
            message.UseDeadLetterQueue = true;
            message.TimeToBeReceived = new TimeSpan(0, 0, 10); // 10s
            message.AdministrationQueue = MessageQueue.Create(queuePathAdmin);
            message.AcknowledgeType = AcknowledgeTypes.NegativeReceive;
            message.Body = "Hello World!";
            Console.WriteLine("Message Queue is ready.");

            // (3) send message
            MessageQueue  messageQueue = new MessageQueue(queuePath);
            messageQueue.Send(message);
            messageQueue.Close();
        }
    }
}

Message Queue Management

Queue Type

Public Queue

Private Queue

Journal Queue

Dead-Letter Queue

Message Queue Management

System.Messaging.MessageQueue

Methods:

Create

Delete

Exists

Purge

SetPermissions
Sending Messages
MessageQueue.Send()

the source code down load address: 
/Files/jigee/msmqDemoCode.rar

...............not be over!................!