.Net消息队列学习(一)

 .Net消息队列学习(一)
    下面的示例只是涉及到构建发送者，发送复杂消息等操作。这里的复杂消息包括两种，一种是作者自己封装的一个类，获取对话框中的几个文本对话框的值。第二种是Net中自带的类Message,t填充他的几个属性，代码如下：
 

private System.Messaging.Message setMessage()
        {
            System.Messaging.Message msg=new System.Messaging.Message();
            msg.Label="A message lable";
            msg.Body="The message body";
            msg.TimeToBeReceived=TimeSpan.FromSeconds(4000);
            msg.UseDeadLetterQueue=true;
            return msg;
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            MessageQueue mq;

            SendForm form=new SendForm();

            if(!MessageQueue.Exists(@".\private$\chelei"))
            {
                try
                {
                    mq=MessageQueue.Create(@".\private$\chelei");
                    form.Name=this.txtname.Text;
                    form.Sex=this.txtsex.Text;
                    form.Email=this.txtemail.Text;
                    form.Address=this.txtaddress.Text;
                    mq.Send(form,"信息");
                    mq.Close();
                    MessageQueue.Delete(@".\private$\chenlei");

                }
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message,"Warning!");

                
                //    
                }
            }
            else
            {
                try
                {
                    mq=new MessageQueue(@".\private$\chenlei");
                    form.Name=this.txtname.Text;
                    form.Sex=this.txtsex.Text;
                    form.Email=this.txtemail.Text;
                    form.Address=this.txtaddress.Text;
                    mq.Send(form,"信息");
                    mq.Close();
                    MessageQueue.Delete(@".\private$\chenlei");
                }
                catch(Exception ex)
                {
                    MessageBox.Show(ex.Message,"Warning!");

                }

                
            }
        


        }

        private void button1_Click_1(object sender, System.EventArgs e)
        {
            try
            {
                MessageQueue mq;
                if(MessageQueue.Exists(@".\private$\aa"))
                {
                    mq=new MessageQueue(@".\private$\aa");
                    mq.Send(this.setMessage());

                }
                else
                {
                    mq=MessageQueue.Create(@".\private$\aa");
                    mq.Send(this.setMessage());
                }
                mq.Close();
                MessageQueue.Delete(@".\private$\aa");
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message,"Warning!");
            }
        }

    }

说明：
1、通过设置TimeToBeReceived属性，这个消息可以在目标队列中保存20秒。
如果没有在20秒内从这个队列中读取他，队列就会删除这条消息。
设置UseDeadLetter属性为true可以通知MSMQ在把它从目标队列中删除之前，把消息复制到"Dead-letter messages"系统队列中
2、只有在发送消息的计算机在域模式下运行MSMQ时，才可以使用简单路径引用网络上的公共消息队列
私有队列路径表示：.\private$\aa
公共队列路径表示：.\aa
3、具体的SendForm类如下：

public class SendForm
    {
        
        private string m_Name;
        private string m_Sex;
        private string m_Email;
        private string m_Address;
        public SendForm()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
        public SendForm(string name,string sex,string email,string address)
        {
            this.m_Name=name;
            this.m_Sex=sex;
            this.m_Email=email;
            this.m_Address=address;

        }
        public string Name
        {
            get
            {
                return this.m_Name;
            }
            set
            {
                this.m_Name=value;
            }
        }
        public string Sex
        {
            get
            {
                return this.m_Sex;
            }
            set
            {
                this.m_Sex=value;
            }
        }
        public string Email
        {
            get 
            {
                return this.m_Email;
            }
            set
            {
                this.m_Email=value;
            }
        }
        public string Address
        {
            get
            {
                return this.m_Address;
            }
            set
            {
                this.m_Address=value;
            }
        }
    }