UDP 簡單使用案例

向右看齐 2022-04-22 02:08 179阅读 0赞

UDP是.net內置的socket方法  
採用UDP可以實現不同應用的相互通信  
接收方監聽的IP+端口號只能開啟一個

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xvc2VkZ3Vlc3Q_size_16_color_FFFFFF_t_70][]

Client

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    using System.Threading;
    using System.Windows.Forms;
    
    namespace UDPClient
    {
        public partial class Form1 : Form
        {
            UdpClient udpClient = null;
            public delegate void UpdateMsgUI(object objx);
            public UpdateMsgUI updateMsgListUI;
            public Form1()
            {
                InitializeComponent();
            }
            private void Form1_Load(object sender, EventArgs e)
            {
                //441 接收消息 114發送消息
                //创建UDPClient对象
                udpClient = new UdpClient(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 441));
                updateMsgListUI = new UpdateMsgUI(SetMsgListText);
                Thread m_SplashThread = new Thread(new ThreadStart(delegate()
                {
                    Recive();
                }));
                m_SplashThread.IsBackground = true;
                m_SplashThread.SetApartmentState(ApartmentState.STA);
                m_SplashThread.Start(); 
               
            }
            private void SetMsgListText(object objx)
            {
    
                if (richTextBox1.Lines.Length > 1000)
                    richTextBox1.Clear();
    
                richTextBox1.AppendText(objx.ToString());
                richTextBox1.AppendText(System.Environment.NewLine);
    
            }
            private void button1_Click(object sender, EventArgs e)
            {
                //發消息 通過114端口發消息
                string Str = this.richTextBox2.Text;
                byte[] data = Encoding.UTF8.GetBytes(Str); //将输入的字符串转化成字符数组
                udpClient.Send(data, data.Length, new IPEndPoint(IPAddress.Parse("127.0.0.1"), 114)); //建立发送函数 出入需要发送的数据          
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                //关闭端口
                if (udpClient != null)
                {
                    udpClient.Close();
                }
            }
    
            /// <summary>
            /// 通過441端口收消息
            /// </summary>
            private void Recive()
            {         
                while (true)
                {
                    //接收数据
                    IPEndPoint point = new IPEndPoint(IPAddress.Any, 0); // 这里创建一个接受IP和端口号的对象传入到第一步的参数中去
                    byte[] data = udpClient.Receive(ref point); //接受数据函数 第一个参数是指定一个IP地址和端口号
                    //转化数据为能够输出的字符串
                    string message = Encoding.UTF8.GetString(data); //先将字符数组转化成能够输出的字符串  
                    this.BeginInvoke(updateMsgListUI, message);
                }           
            }
        }
    }

Server

using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Net;
    using System.Net.Sockets;
    using System.Text;
    using System.Threading;
    using System.Windows.Forms;
    
    namespace UDPServer
    {
        public partial class Form1 : Form
        {      
            public delegate void UpdateMsgUI(object objx);
            public UpdateMsgUI updateMsgListUI;
            bool isStop = false;
            UdpClient udpClient =null;
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                updateMsgListUI = new UpdateMsgUI(SetMsgListText);
            }
            private void SetMsgListText(object objx)
            {
    
                if (richTextBox1.Lines.Length > 1000)
                    richTextBox1.Clear();
    
                richTextBox1.AppendText(objx.ToString());
                richTextBox1.AppendText(System.Environment.NewLine);
    
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                button1.Enabled = false;
                updateMsgListUI("啟動");
                isStop = false;
               Thread m_SplashThread = new Thread(new ThreadStart(delegate()
               {
                   Run();
               }));
               m_SplashThread.IsBackground = true;
               m_SplashThread.SetApartmentState(ApartmentState.STA);
               m_SplashThread.Start(); 
            }
    
            private void Run()
            {
                //114接收消息 441發送消息
                //创建UDPClient对象而且绑定IP和端口号-服务端
                udpClient = new UdpClient(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 114));
                //建立死循环让用户可以重复接受
                while (true)
                {
                    if (isStop)
                    {
                        break;
                    }
                    //接收数据
                    IPEndPoint point = new IPEndPoint(IPAddress.Any, 0); //2.2 这里创建一个接受IP和端口号的对象传入到第一步的参数中去
                    byte[] data = udpClient.Receive(ref point); //2.1接受数据函数 第一个参数是指定一个IP地址和端口号
                    //转化数据为能够输出的字符串
                    string Str = Encoding.UTF8.GetString(data); //3.1先将字符数组转化成能够输出的字符串      
    
                    this.BeginInvoke(updateMsgListUI, Str);
                    Rpley(Str);
                }
    
               
            }
    
            private void Rpley(string Str)
            {          
                Str = "收到" + Str;
                byte[] Senddata = Encoding.UTF8.GetBytes(Str); //将输入的字符串转化成字符数组
                udpClient.Send(Senddata, Senddata.Length, new IPEndPoint(IPAddress.Parse("127.0.0.1"), 441)); //建立发送函数 出入需要发送的数据
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                button1.Enabled = true;
                isStop = true;
                //关闭一下数据连接
                udpClient.Close();
            }      
        }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xvc2VkZ3Vlc3Q_size_16_color_FFFFFF_t_70]: /images/20220422/bb652bbf1ea547f6b598e244331b0cb3.png