C# UDP通信

如下是界面布局代码


namespace SmartHomeMsgTest
{
    partial class Form1
    {
        /// <summary>
        /// 必需的设计器变量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的资源。
        /// </summary>
        /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗体设计器生成的代码

        /// <summary>
        /// 设计器支持所需的方法 - 不要
        /// 使用代码编辑器修改此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {
            this.txtMsg = new System.Windows.Forms.TextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.btnLogin = new System.Windows.Forms.Button();
            this.button3 = new System.Windows.Forms.Button();
            this.checkBox1 = new System.Windows.Forms.CheckBox();
            this.checkBox2 = new System.Windows.Forms.CheckBox();
            this.checkBox3 = new System.Windows.Forms.CheckBox();
            this.checkBox4 = new System.Windows.Forms.CheckBox();
            this.checkBox5 = new System.Windows.Forms.CheckBox();
            this.groupBox1 = new System.Windows.Forms.GroupBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.textBox3 = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.txtServerIP = new System.Windows.Forms.TextBox();
            this.btnInit = new System.Windows.Forms.Button();
            this.groupBox1.SuspendLayout();
            this.SuspendLayout();
            // 
            // txtMsg
            // 
            this.txtMsg.Dock = System.Windows.Forms.DockStyle.Bottom;
            this.txtMsg.Location = new System.Drawing.Point(0, 304);
            this.txtMsg.Multiline = true;
            this.txtMsg.Name = "txtMsg";
            this.txtMsg.Size = new System.Drawing.Size(786, 248);
            this.txtMsg.TabIndex = 0;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(6, 153);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(120, 23);
            this.button1.TabIndex = 1;
            this.button1.Text = "发送订阅数据";
            this.button1.UseVisualStyleBackColor = true;
            // 
            // btnLogin
            // 
            this.btnLogin.Location = new System.Drawing.Point(181, 66);
            this.btnLogin.Name = "btnLogin";
            this.btnLogin.Size = new System.Drawing.Size(75, 23);
            this.btnLogin.TabIndex = 2;
            this.btnLogin.Text = "发送登录";
            this.btnLogin.UseVisualStyleBackColor = true;
            this.btnLogin.Click += new System.EventHandler(this.btnLogin_Click);
            // 
            // button3
            // 
            this.button3.Location = new System.Drawing.Point(6, 191);
            this.button3.Name = "button3";
            this.button3.Size = new System.Drawing.Size(120, 23);
            this.button3.TabIndex = 1;
            this.button3.Text = "取消订阅数据";
            this.button3.UseVisualStyleBackColor = true;
            // 
            // checkBox1
            // 
            this.checkBox1.AutoSize = true;
            this.checkBox1.Location = new System.Drawing.Point(6, 22);
            this.checkBox1.Name = "checkBox1";
            this.checkBox1.Size = new System.Drawing.Size(48, 16);
            this.checkBox1.TabIndex = 3;
            this.checkBox1.Text = "报警";
            this.checkBox1.UseVisualStyleBackColor = true;
            // 
            // checkBox2
            // 
            this.checkBox2.AutoSize = true;
            this.checkBox2.Location = new System.Drawing.Point(6, 44);
            this.checkBox2.Name = "checkBox2";
            this.checkBox2.Size = new System.Drawing.Size(60, 16);
            this.checkBox2.TabIndex = 3;
            this.checkBox2.Text = "布撤防";
            this.checkBox2.UseVisualStyleBackColor = true;
            // 
            // checkBox3
            // 
            this.checkBox3.AutoSize = true;
            this.checkBox3.Location = new System.Drawing.Point(6, 66);
            this.checkBox3.Name = "checkBox3";
            this.checkBox3.Size = new System.Drawing.Size(48, 16);
            this.checkBox3.TabIndex = 3;
            this.checkBox3.Text = "空调";
            this.checkBox3.UseVisualStyleBackColor = true;
            // 
            // checkBox4
            // 
            this.checkBox4.AutoSize = true;
            this.checkBox4.Location = new System.Drawing.Point(6, 88);
            this.checkBox4.Name = "checkBox4";
            this.checkBox4.Size = new System.Drawing.Size(48, 16);
            this.checkBox4.TabIndex = 3;
            this.checkBox4.Text = "新风";
            this.checkBox4.UseVisualStyleBackColor = true;
            // 
            // checkBox5
            // 
            this.checkBox5.AutoSize = true;
            this.checkBox5.Location = new System.Drawing.Point(6, 110);
            this.checkBox5.Name = "checkBox5";
            this.checkBox5.Size = new System.Drawing.Size(48, 16);
            this.checkBox5.TabIndex = 3;
            this.checkBox5.Text = "地暖";
            this.checkBox5.UseVisualStyleBackColor = true;
            // 
            // groupBox1
            // 
            this.groupBox1.Controls.Add(this.button1);
            this.groupBox1.Controls.Add(this.checkBox5);
            this.groupBox1.Controls.Add(this.button3);
            this.groupBox1.Controls.Add(this.checkBox4);
            this.groupBox1.Controls.Add(this.checkBox1);
            this.groupBox1.Controls.Add(this.checkBox3);
            this.groupBox1.Controls.Add(this.checkBox2);
            this.groupBox1.Location = new System.Drawing.Point(25, 51);
            this.groupBox1.Name = "groupBox1";
            this.groupBox1.Size = new System.Drawing.Size(143, 233);
            this.groupBox1.TabIndex = 4;
            this.groupBox1.TabStop = false;
            this.groupBox1.Text = "手机推送订阅";
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(229, 19);
            this.textBox2.Name = "textBox2";
            this.textBox2.Size = new System.Drawing.Size(100, 21);
            this.textBox2.TabIndex = 5;
            this.textBox2.Text = "15017941380";
            // 
            // textBox3
            // 
            this.textBox3.Location = new System.Drawing.Point(376, 19);
            this.textBox3.Name = "textBox3";
            this.textBox3.Size = new System.Drawing.Size(100, 21);
            this.textBox3.TabIndex = 6;
            this.textBox3.Text = "ABCabc123";
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(179, 23);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(41, 12);
            this.label1.TabIndex = 7;
            this.label1.Text = "手机号";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(338, 23);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(29, 12);
            this.label2.TabIndex = 7;
            this.label2.Text = "密码";
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Location = new System.Drawing.Point(0, 23);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(65, 12);
            this.label3.TabIndex = 8;
            this.label3.Text = "服务器地址";
            // 
            // txtServerIP
            // 
            this.txtServerIP.Location = new System.Drawing.Point(68, 19);
            this.txtServerIP.Name = "txtServerIP";
            this.txtServerIP.Size = new System.Drawing.Size(100, 21);
            this.txtServerIP.TabIndex = 9;
            this.txtServerIP.Text = "120.79.68.201";
            // 
            // btnInit
            // 
            this.btnInit.Location = new System.Drawing.Point(503, 16);
            this.btnInit.Name = "btnInit";
            this.btnInit.Size = new System.Drawing.Size(75, 23);
            this.btnInit.TabIndex = 10;
            this.btnInit.Text = "初始化";
            this.btnInit.UseVisualStyleBackColor = true;
            this.btnInit.Click += new System.EventHandler(this.btnInit_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(786, 552);
            this.Controls.Add(this.btnInit);
            this.Controls.Add(this.txtServerIP);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.textBox3);
            this.Controls.Add(this.textBox2);
            this.Controls.Add(this.groupBox1);
            this.Controls.Add(this.btnLogin);
            this.Controls.Add(this.txtMsg);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            this.groupBox1.ResumeLayout(false);
            this.groupBox1.PerformLayout();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.TextBox txtMsg;
        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.Button btnLogin;
        private System.Windows.Forms.Button button3;
        private System.Windows.Forms.CheckBox checkBox1;
        private System.Windows.Forms.CheckBox checkBox2;
        private System.Windows.Forms.CheckBox checkBox3;
        private System.Windows.Forms.CheckBox checkBox4;
        private System.Windows.Forms.CheckBox checkBox5;
        private System.Windows.Forms.GroupBox groupBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.TextBox textBox3;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.TextBox txtServerIP;
        private System.Windows.Forms.Button btnInit;
    }
}

如下是UPD初始化与通信实现代码

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 SmartHomeMsgTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 用于UDP发送的网络服务类
        /// </summary>
        private UdpClient udpcSend;



        private int port = 60000;

        IPEndPoint remoteIpep = null;
        IPEndPoint localIpep = null;
        private void Form1_Load(object sender, EventArgs e)
        {
            localIpep = new IPEndPoint(IPAddress.Any, 10001); // 本机IP，指定的端口号



        }


        private void btnInit_Click(object sender, EventArgs e)
        {
            if (udpcSend == null)
            {
                remoteIpep = new IPEndPoint(IPAddress.Parse(this.txtServerIP.Text.Trim()), port); // 发送到的IP地址和端口号
                udpcSend = new UdpClient(localIpep);
                ThreadPool.QueueUserWorkItem((a) =>
               {
                   ReceiveMessage();
               });

                this.txtServerIP.Enabled = false;
                this.btnInit.Text = "反初始化";

            }
            else
            {
                this.txtServerIP.Enabled = true;
                udpcSend.Close();
                udpcSend = null;

                this.btnInit.Text = "初始化";
            }
        }
        private void btnLogin_Click(object sender, EventArgs e)
        {
            string msg = "0123456789";
            SendMessage(msg);
            ShowMsg(msg);

        }


        private void SendMessage(string message)
        {
            try
            {
                ThreadPool.QueueUserWorkItem((a) =>
                          {

                              byte[] sendbytes = Encoding.UTF8.GetBytes(message);
                              udpcSend.Send(sendbytes, sendbytes.Length, remoteIpep);
                          });
            }
            catch (Exception e)
            {

                MessageBox.Show(e.ToString());
            }



        }
        /// <summary>
        /// 接收数据
        /// </summary>
        /// <param name="obj"></param>
        private void ReceiveMessage()
        {
            IPEndPoint remoteIpep = new IPEndPoint(IPAddress.Any, 0);
            while (true)
            {
                try
                {
                    if (udpcSend != null)
                    {
                        byte[] bytRecv = udpcSend.Receive(ref remoteIpep);
                        string message = Encoding.UTF8.GetString(bytRecv, 0, bytRecv.Length);
                        ShowMsg(string.Format("{0}[{1}]", remoteIpep, message));
                    }
                }
                catch (Exception ex)
                {
                    ShowMsg(ex.Message);
                    // break;
                }
            }
        }

        private void ShowMsg(string msg)
        {
            if (txtMsg.InvokeRequired)
            {
                this.txtMsg.Invoke(new Action(() =>
                {
                    this.txtMsg.AppendText(msg);
                }));
            }
            else
            {
                this.txtMsg.AppendText(msg);
            }
        }





    }
}