本文主要介绍了C#以太网Sockets客户端设计实现，文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值，需要的朋友们下面随着小编来一起学习学习吧

【1】客户端对象

using System.Net;// DNS_静态对象
using System.Net.Sockets;
 
// 字段位置
private Socket socket业务;  //对象既可以当服务器，又可以当客户端
TcpListener tcpListener;   //服务器对象
TcpClient tcpClient;       //客户端对象

【2】初始化

Socket tcpClient客户端;

tcpClient客户端 = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

【3】连接

 #region 连接
 
        /// <summary>
        /// 建立连接
        /// </summary>
        /// <param name="ip">IP地址</param>
        /// <param name="port">端口号</param>
        public void Connect(string ip, string port)
        {
            try
            {
                //实例化Socket
                tcpClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
 
                //设置Socket属性
                tcpClient.SendTimeout = this.SendTimeOut;
 
                tcpClient.ReceiveTimeout = this.ReceiveTimeOut;
 
                //封装一个EndPoint对象
                IPEndPoint endPoint = new IPEndPoint(IPAddress.Parse(ip), int.Parse(port));
 
                //建立连接
                tcpClient.Connect(endPoint);
            }
            catch (Exception ex) { MessageBox.Show(ex.Message); }//显示错误
        }
 
        #endregion

【4】收发

  #region 读取并接受
 
        /// <summary>
        /// 发送并接受
        /// </summary>
        /// <param name="SendByte"></param>
        /// <returns></returns>
        public byte[] SendAndReceive(byte[] SendByte)
        {
            try
            {
                if (tcpClient.Available >= 1)//   丢弃字节
                {
                    #region 加载
                    byte[] buffer = new byte[tcpClient.Available];//准备加载
                    tcpClient.Receive(buffer, buffer.Length, SocketFlags.None);//开始加载
                    #endregion
                }
                #region 计时
                //====现在时间======================================
                str_发送后记时 = new StringBuilder(String.Format("{0,9}",
                    DateTime.Now.Second.ToString() + "s"
                    + DateTime.Now.Millisecond.ToString() + "ms:"));  //固定长度9 右对齐
                #endregion
                tcpClient.Send(SendByte);// 发送
               
                #region 委托
                if (Help_ModBus.Wt_set != null)
                {
                    Help_ModBus.Wt_set(SendByte, str_发送后记时.ToString());
                }
                #endregion
 
                return ReadMessage();
            }
            catch (Exception ex) { MessageBox.Show(ex.Message); }//显示错误
            finally
            {
                //InteractiveLock.Leave();
            }
            return null;
        }
 
 
        /// <summary>
        /// 读取缓冲区值
        /// </summary>
        /// <returns></returns>
        private byte[] ReadMessage()
        {
            DateTime startTime = DateTime.Now;//记录开始时间
            do
            {
                if (tcpClient.Available >= 5 )//   字节
                {
                    #region 计时
                    //====现在时间======================================
                    str_发送后记时 = new StringBuilder(String.Format("{0,9}",
                        DateTime.Now.Second.ToString() + "s"
                        + DateTime.Now.Millisecond.ToString() + "ms:"));  //固定长度9 右对齐
                    #endregion
                    #region 加载
                    byte[] buffer = new byte[tcpClient.Available];//准备加载
                    tcpClient.Receive(buffer, buffer.Length, SocketFlags.None);//开始加载
                    #endregion
                    #region 委托
                    if (Help_ModBus.Wt_get != null)//委托呼叫ui
                    {
                        Help_ModBus.Wt_get(buffer, str_发送后记时.ToString());// ui显示
                    }
                    #endregion
                    return buffer;
                }
                #region 超时跳出
                if ((DateTime.Now - startTime).TotalMilliseconds > ReceiveTimeOut+500)// 超时 1.5s
                {
                    break;// 已经超时
                }
                #endregion
 
            } while (true);
            return null; // 相当失败
 
 
 
            //Thread.Sleep(ReceiveTimeOut);// 延时15ms
            //int count = tcpClient.Available;  //  字节
            //if (count == 0)
            //{
            //    return null;
            /