代码篇C#网络编程之UDP进程通信

最新推荐文章于 2020-11-07 19:49:02 发布

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#C#网络编程 #UDP进程通信

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本文介绍如何利用C#语言通过UDP协议在进程间进行基本的消息传递。包括匿名和实名发送消息的方式，以及如何在客户端接收消息。

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace _006_UDP进程通信
{
    public partial class Form1 : Form
    {
        //--显示消息回调
        private delegate void ShowMessageCallBack(string text);
        private ShowMessageCallBack showMessageCallBack;
        //--匿名UDP客户端
        private UdpClient AnonyUdpClient;
        //--实名UDP客户端
        private UdpClient myUdpClient;

        public Form1()
        {
            InitializeComponent();
        }

        //---发送消息按钮被单击事件
        private void btn_sendMessage_Click(object sender, EventArgs e)
        {
            //--判断是否为匿名发送
            if (checkbox_hideName.Checked)
            {
                //--匿名发送
                AnonyUdpClient = new UdpClient();
            }
            //--创建并启动消息线程
            Thread sendMessageThread = new Thread(SendMessage);
            //--主线程退出，它也退出
            sendMessageThread.IsBackground = true;
            sendMessageThread.Start();
        }

       //---发送消息线程
        private void SendMessage()
        {
            //--创建一个IP终端借点
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse(textbox_localIP.Text),Convert.ToInt32(textbox_localPort.Text));
            //--判断是否为匿名发送
            //--准发送数据
            byte[] sendData = Encoding.Default.GetBytes(textbox_sendMessage.Text);

            if (checkbox_hideName.Checked)
            {
                //--匿名发送
                AnonyUdpClient.Send(sendData, sendData.Length, ipEndPoint);
                //--关闭
                AnonyUdpClient.Close();
            }
            else
            {
                //--实名发送
                myUdpClient.Send(sendData, sendData.Length, ipEndPoint);
            }
       }

        //--消息接受线程
        private void ReceiveMessage()
        {
            //--实例化一个IP终结点
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, 0);
            while(true)
            {
                try
                {
                    //--获取消息
                    byte[] getData = myUdpClient.Receive(ref ipEndPoint);
                    string msg = Encoding.Default.GetString(getData);
                    listbox_showMessage.Invoke(showMessageCallBack, ipEndPoint.ToString() + ":" + msg);
                }
                catch(ThreadAbortException)
                {

                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        private void btn_start_Click(object sender, EventArgs e)
        {
            IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse(textbox_localIP.Text), Convert.ToInt32(textbox_localPort.Text));
            //--实例化UDP客户端
            myUdpClient = new UdpClient(ipEndPoint);
            //---创建并启动消息接收线程
            Thread ReceiveMessageThread = new Thread(ReceiveMessage);
            ReceiveMessageThread.IsBackground = true;
            ReceiveMessageThread.Start();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
           //--初始化回调
            showMessageCallBack = new ShowMessageCallBack(ShowMessage);
        }

        //--显示消息被委托的方法
        private void ShowMessage(string text)
        {
            listbox_showMessage.Items.Add(text);
        }
    }
}