实现分解器把订单分解为单独的商品(c#)

最新推荐文章于 2023-07-15 16:03:37 发布

chenyuanboy

最新推荐文章于 2023-07-15 16:03:37 发布

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文章标签： C C++ C# Windows XML

本文介绍了一种在Windows窗体应用程序中实现线程安全的方法，通过使用XML消息队列来发送和接收数据，并展示了如何在接收到消息后安全地更新UI控件的内容。

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本文还考虑了如何对 Windows 窗体控件进行线程安全调用


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;
using System.Threading;
namespace msmq应用
{
    public partial class Form5 : Form
    {
        MessageQueue mq1;
        String text;
        delegate void setTextCallBack(String text);

        public Form5()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            XmlDocument xd = new XmlDocument();
            xd.Load("XMLFile1.xml");

            if (!MessageQueue.Exists(@".\private$\myPrivate"))
            {
                MessageQueue.Create(@".\private$\myPrivate");
            }
            MessageQueue mq = new MessageQueue(@".\private$\myPrivate");
            mq.Send(xd);
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (!MessageQueue.Exists(@".\private$\myPrivate"))
            {
                MessageQueue.Create(@".\private$\myPrivate");
            }
            MessageQueue mq = new MessageQueue(@".\private$\myPrivate");
            mq.ReceiveCompleted += new ReceiveCompletedEventHandler(OnMessage);
            mq.BeginReceive();

            if (!MessageQueue.Exists(@".\private$\myPrivate1"))
            {
                MessageQueue.Create(@".\private$\myPrivate1");
            }
            mq1 = new MessageQueue(@".\private$\myPrivate1");
            mq1.Formatter = new XmlMessageFormatter(new Type[] { typeof(XmlDocument) });
        }

        protected void showRichTextBox1()
        {
            this.setText(text);
        }

        private void setText(String text)
        {
            if (this.richTextBox1.InvokeRequired)
            {
                setTextCallBack d = new setTextCallBack(setText);
                this.Invoke(d, new object[] { text });
            }
            else
            {
                this.richTextBox1.Text = text;
            }
        }

        protected void OnMessage(Object source,ReceiveCompletedEventArgs asyncResult)
        {
            MessageQueue mq = (MessageQueue)source;
            mq.Formatter = new XmlMessageFormatter(new Type[] { typeof(XmlDocument) });
            System.Messaging.Message message = mq.EndReceive(asyncResult.AsyncResult);

            XmlDocument xdoc = new XmlDocument();

            xdoc = (XmlDocument)message.Body;
            text = xdoc.DocumentElement.OuterXml.ToString();
            Thread newthread = new Thread(new ThreadStart(this.showRichTextBox1));
            newthread.Start();


            XmlNodeList nodelist;
            XmlElement root = xdoc.DocumentElement;

            XmlNode date = root.SelectSingleNode("date");
            XmlNode ordernumber = root.SelectSingleNode("ordernumber");
            XmlNode id = root.SelectSingleNode("customer/id");
            XmlElement customerid = xdoc.CreateElement("customerid");
            customerid.InnerText = id.InnerXml;

            nodelist = root.SelectNodes("/order/orderitems/item");

            XmlDocument doc=null;
            foreach (XmlNode item in nodelist)
            {
                doc = new XmlDocument();
                doc.LoadXml("<orderitem/>");

                XmlElement orderitem = doc.DocumentElement;

                orderitem.AppendChild(doc.ImportNode(date,true));
                orderitem.AppendChild(doc.ImportNode(ordernumber,true));
                orderitem.AppendChild(doc.ImportNode(customerid,true));

                for (int i = 0; i < item.ChildNodes.Count; i++)
                {
                    orderitem.AppendChild(doc.ImportNode(item.ChildNodes[i],true));
                }
            }

            mq1.Send(doc);

        }


        private void button3_Click(object sender, EventArgs e)
        {
            if (!MessageQueue.Exists(@".\private$\myPrivate1"))
            {
                MessageQueue.Create(@".\private$\myPrivate1");
            }
            MessageQueue mq2 = new MessageQueue(@".\private$\myPrivate1");
            mq2.Formatter = new XmlMessageFormatter(new Type[] { typeof(XmlDocument) });
            System.Messaging.Message message= mq2.Receive();
            XmlDocument doc = new XmlDocument();
            doc = (XmlDocument)message.Body;
            this.richTextBox2.Text = doc.DocumentElement.OuterXml;
            doc.Save("chenyuan.xml");
        }
    }
}