C# 使用 Windows 消息队列机制

C# 使用 Windows 消息队列机制

保存消息队列数据的本地磁盘地址：C:\WINDOWS\system32\msmq\storage

注意：

1，要使用 windows 消息队列机制，必须在该 windows操作系统中先安装“ windows 消息队列” 组件（从操作系统光盘中） ；

2，要使用启用消息队列，必须先启动“Messenger”服务（传输客户端和服务器之间的 NET SEND 和 Alerter 服务消息。此服务与 Windows Messenger 无关。如果服务停止，Alerter 消息不会被传输。如果服务被禁用，任何直接依赖于此服务的服务将无法启动。）；

控件：

代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Messaging;
using System.Xml.Serialization;

namespace MessageQueuingExample
{
public partial class Form1 : Form
{
//The . in the queueName represents localhost
private const string queueName = ".\\Private$\\Liuq";
//private const string queueName = "A405\\Private$\\Liuq";

//We need this class-wide to access it in the methods.
MessageQueue queue = null;

public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
//Create the queue if it doesn't exist.
CreateQueue();
}

private void CreateQueue()
{
//Does the queue already exist??
if (MessageQueue.Exists(queueName))
//Yes, it's already there.
queue = new MessageQueue(queueName);
else
//No, we need to create it.
queue = MessageQueue.Create(queueName, false);
}

private void btnSendMessage_Click(object sender, EventArgs e)
{
//Instantiate our MessageContent object.
MessageContent message = new MessageContent("Hello world!");

//Send it to the queue.
queue.Send(message, "Sample Message");

MessageBox.Show("Message sent.", "MSMQ");
}

private void btnEnumerateMessages_Click(object sender, EventArgs e)
{
//Clear the textbox.
this.txtMessages.Clear();

//Get all messages on the queue.
System.Messaging.Message[] messages = queue.GetAllMessages();

//Loop through the messages.
foreach (System.Messaging.Message message in messages)
{
//Set the formatter for the message.
message.Formatter = new System.Messaging.XmlMessageFormatter(new Type[1] { typeof(MessageContent) });

//Get the MessageContent object out of the message.
MessageContent content = (MessageContent)message.Body;

//Update the textbox.
this.txtMessages.Text += content.MessageText + " - " + content.CreationDate.ToString() + "\r\n";
}
}

private void btnRemoveMessages_Click(object sender, EventArgs e)
{
//Purge all messages from the queue.
queue.Purge();

MessageBox.Show("Messages purged", "MSMQ");
}

private void btnSendHighestPriorityMessage_Click(object sender, EventArgs e)
{
//Create a XmlSerializer for the object type we're sending.
XmlSerializer serializer = new XmlSerializer(typeof(MessageContent));

//Instantiate a new message.
System.Messaging.Message queueMessage = new System.Messaging.Message();

//Set the priority to Highest.
queueMessage.Priority = MessagePriority.Highest;

//Create our MessageContent object.
MessageContent messageContent = new MessageContent("Hello world - IMPORTANT!");

//Serialize the MessageContent object into the queueMessage.
serializer.Serialize(queueMessage.BodyStream, messageContent);

//Send the message.
queue.Send(queueMessage, "HIGH PRIORITY");

MessageBox.Show("Important message sent.", "MSMQ");
}
}
}