.net 消息队列简单实例

刚学习微软的消息队列，通过查找资料做了一个简单的实例，大概步骤和代码如下：

1、首页在操作系统上安装消息队列

控制面板—>添加安装程序：在IIS（window2003应用程序服务）下面，钩选"消息队列"

图一：

/Files/lmjob/clip_image002_thumb.jpg

 

2、新建ASP.NET Web应用程序，并添加引用"System.Messaging"类

3、创建消息、发送消息、接收消息代码：

 

/// <summary>
        /// 创建消息队列
        /// </summary>
        /// <param name="name">消息队列名称</param>
        /// <returns></returns>
        public static string CreateNewQueue(string name)
        {
            if (!System.Messaging.MessageQueue.Exists(".\\private$\\" + name))//检查是否已经存在同名的消息队列
            {
                System.Messaging.MessageQueue mq = System.Messaging.MessageQueue.Create(".\\private$\\" + name);
                mq.Label = "test";
                return "ok";
            }
            else
            {
                return "已经存在";
            }
        }

        /// <summary>
        /// 同步发送消息
        /// </summary>
        /// <param name="input">发送的内容</param>
        /// <param name="queueName">发送哪个消息队列中</param>
        public static void SendMsg(string input, string queueName)
        {
            // System.Messaging.MessageQueue.Create(".\\private$\\test2");
            System.Messaging.MessageQueue mq = new MessageQueue(".\\private$\\" + queueName);
            System.Messaging.Message message = new System.Messaging.Message();
            message.Body = input;
            message.Formatter = new System.Messaging.XmlMessageFormatter(new Type[] { typeof(string) });
            mq.Send(message);

        }

        /// <summary>
        /// 同步发送消息
        /// </summary>
        /// <param name="input">发送的内容</param>
        /// <param name="queueName">发送哪个消息队列中</param>
        public static void SendMsg(string[] strList, string queueName)
        { 
            System.Messaging.MessageQueue mq = new MessageQueue(".\\private$\\" + queueName);
            System.Messaging.Message message = new System.Messaging.Message();
            message.Body = strList;
            message.Formatter = new System.Messaging.XmlMessageFormatter(new Type[] { typeof(string) });
            mq.Send(message);

        }

        /// <summary>
        /// 同步接收消息(消息为字符串)
        /// </summary>
        /// <param name="queueName">从哪个消息队列接受消息</param>
        /// <returns></returns>
        public static string ReceiveMsg(string queueName)
        {
            System.Messaging.MessageQueue mq = new MessageQueue(".\\private$\\" + queueName);

            if (mq.GetAllMessages().Length == 0)//判断是否还有消息，如果没有消息的话Receive方法会一直独占进程直到有消息为止，所以必须判断
            {
                return "没有消息了";
            }
            else
            {
                Message m = mq.Receive();
                m.Formatter = new System.Messaging.XmlMessageFormatter(new Type[] { typeof(string) });
                return m.Body.ToString();
            }
        }

        /// <summary>
        /// 同步接收消息(消息为数组对象)
        /// </summary>
        /// <param name="queueName">从哪个消息队列接受消息</param>
        /// <returns></returns>
        public static string[] ReceiveMsgList(string queueName)
        {
            System.Messaging.MessageQueue mq = new MessageQueue(".\\private$\\" + queueName);

            if (mq.GetAllMessages().Length == 0)//判断是否还有消息，如果没有消息的话Receive方法会一直独占进程直到有消息为止，所以必须判断
            {
                return null;
            }
            else
            {
                Message m = mq.Receive();
                m.Formatter = new System.Messaging.XmlMessageFormatter(new Type[] { typeof(string[]) });
                return (string[])m.Body;
            }
        }

        #region 发送消息事件
        protected void btn_Send_Click(object sender, EventArgs e)
        {
            SendMsg(this.txt_Message.Text, "LmjobMsg"); 

            //消息为数组对象
            //string[] list = new string[] { "王一", "王二", "王三", "王四" };
            //SendMsg(list, "LmjobMsg"); 
        }
        #endregion

        #region 接收消息事件
        protected void btn_Accept_Click(object sender, EventArgs e)
        {
            string messageBody = ReceiveMsg("LmjobMsg");
            this.txt_Accept.Text = messageBody;

            ////如果消息为数组对象
            //string[] messageBody = ReceiveMsgList("LmjobMsg");

            //string messageValue = "";
            //if (null != messageBody)
            //{
            //    foreach (string a in messageBody)
            //    {
            //        messageValue += a+",";
            //    }
            //}
            //this.txt_Accept.Text = messageValue;  
        }
        #endregion

 

 

经测试发现：1、如果接收到消息后，消息管理器在消息队列中立即删除该消息。2、消息队列可以传输多种类型数据（例：字符串、整形、对象等）

 

附：项目代码  

/Files/lmjob/MSMQTest.rar