网口通信

• 1. 七层协议
• 2. TCP协议
• 3. 使用C#实现TCP
• • 3.1 服务器
  • 3.2 客户端
• 4. 资源下载地址

#mermaid-svg-Vb7A9ZmXTkbQYQLD .label{font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family);fill:#333;color:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .label text{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .node rect,#mermaid-svg-Vb7A9ZmXTkbQYQLD .node circle,#mermaid-svg-Vb7A9ZmXTkbQYQLD .node ellipse,#mermaid-svg-Vb7A9ZmXTkbQYQLD .node polygon,#mermaid-svg-Vb7A9ZmXTkbQYQLD .node path{fill:#ECECFF;stroke:#9370db;stroke-width:1px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .node .label{text-align:center;fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .node.clickable{cursor:pointer}#mermaid-svg-Vb7A9ZmXTkbQYQLD .arrowheadPath{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edgePath .path{stroke:#333;stroke-width:1.5px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .flowchart-link{stroke:#333;fill:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edgeLabel{background-color:#e8e8e8;text-align:center}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edgeLabel rect{opacity:0.9}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edgeLabel span{color:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .cluster rect{fill:#ffffde;stroke:#aa3;stroke-width:1px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .cluster text{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family);font-size:12px;background:#ffffde;border:1px solid #aa3;border-radius:2px;pointer-events:none;z-index:100}#mermaid-svg-Vb7A9ZmXTkbQYQLD .actor{stroke:#ccf;fill:#ECECFF}#mermaid-svg-Vb7A9ZmXTkbQYQLD text.actor>tspan{fill:#000;stroke:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .actor-line{stroke:grey}#mermaid-svg-Vb7A9ZmXTkbQYQLD .messageLine0{stroke-width:1.5;stroke-dasharray:none;stroke:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .messageLine1{stroke-width:1.5;stroke-dasharray:2, 2;stroke:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD #arrowhead path{fill:#333;stroke:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .sequenceNumber{fill:#fff}#mermaid-svg-Vb7A9ZmXTkbQYQLD #sequencenumber{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD #crosshead path{fill:#333;stroke:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .messageText{fill:#333;stroke:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .labelBox{stroke:#ccf;fill:#ECECFF}#mermaid-svg-Vb7A9ZmXTkbQYQLD .labelText,#mermaid-svg-Vb7A9ZmXTkbQYQLD .labelText>tspan{fill:#000;stroke:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .loopText,#mermaid-svg-Vb7A9ZmXTkbQYQLD .loopText>tspan{fill:#000;stroke:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .loopLine{stroke-width:2px;stroke-dasharray:2, 2;stroke:#ccf;fill:#ccf}#mermaid-svg-Vb7A9ZmXTkbQYQLD .note{stroke:#aa3;fill:#fff5ad}#mermaid-svg-Vb7A9ZmXTkbQYQLD .noteText,#mermaid-svg-Vb7A9ZmXTkbQYQLD .noteText>tspan{fill:#000;stroke:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .activation0{fill:#f4f4f4;stroke:#666}#mermaid-svg-Vb7A9ZmXTkbQYQLD .activation1{fill:#f4f4f4;stroke:#666}#mermaid-svg-Vb7A9ZmXTkbQYQLD .activation2{fill:#f4f4f4;stroke:#666}#mermaid-svg-Vb7A9ZmXTkbQYQLD .mermaid-main-font{font-family:"trebuchet ms", verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .section{stroke:none;opacity:0.2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .section0{fill:rgba(102,102,255,0.49)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .section2{fill:#fff400}#mermaid-svg-Vb7A9ZmXTkbQYQLD .section1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .section3{fill:#fff;opacity:0.2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .sectionTitle0{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .sectionTitle1{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .sectionTitle2{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .sectionTitle3{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .sectionTitle{text-anchor:start;font-size:11px;text-height:14px;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .grid .tick{stroke:#d3d3d3;opacity:0.8;shape-rendering:crispEdges}#mermaid-svg-Vb7A9ZmXTkbQYQLD .grid .tick text{font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .grid path{stroke-width:0}#mermaid-svg-Vb7A9ZmXTkbQYQLD .today{fill:none;stroke:red;stroke-width:2px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .task{stroke-width:2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText{text-anchor:middle;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText:not([font-size]){font-size:11px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutsideRight{fill:#000;text-anchor:start;font-size:11px;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutsideLeft{fill:#000;text-anchor:end;font-size:11px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .task.clickable{cursor:pointer}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText.clickable{cursor:pointer;fill:#003163 !important;font-weight:bold}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutsideLeft.clickable{cursor:pointer;fill:#003163 !important;font-weight:bold}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutsideRight.clickable{cursor:pointer;fill:#003163 !important;font-weight:bold}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskText3{fill:#fff}#mermaid-svg-Vb7A9ZmXTkbQYQLD .task0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .task1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .task2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .task3{fill:#8a90dd;stroke:#534fbc}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutside0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutside2{fill:#000}#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutside1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .taskTextOutside3{fill:#000}#mermaid-svg-Vb7A9ZmXTkbQYQLD .active0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .active1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .active2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .active3{fill:#bfc7ff;stroke:#534fbc}#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeText0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeText1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeText2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeText3{fill:#000 !important}#mermaid-svg-Vb7A9ZmXTkbQYQLD .done0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .done1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .done2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .done3{stroke:grey;fill:#d3d3d3;stroke-width:2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneText0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneText1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneText2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneText3{fill:#000 !important}#mermaid-svg-Vb7A9ZmXTkbQYQLD .crit0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .crit1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .crit2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .crit3{stroke:#f88;fill:red;stroke-width:2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCrit0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCrit1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCrit2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCrit3{stroke:#f88;fill:#bfc7ff;stroke-width:2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCrit0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCrit1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCrit2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCrit3{stroke:#f88;fill:#d3d3d3;stroke-width:2;cursor:pointer;shape-rendering:crispEdges}#mermaid-svg-Vb7A9ZmXTkbQYQLD .milestone{transform:rotate(45deg) scale(0.8, 0.8)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .milestoneText{font-style:italic}#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCritText0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCritText1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCritText2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .doneCritText3{fill:#000 !important}#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCritText0,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCritText1,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCritText2,#mermaid-svg-Vb7A9ZmXTkbQYQLD .activeCritText3{fill:#000 !important}#mermaid-svg-Vb7A9ZmXTkbQYQLD .titleText{text-anchor:middle;font-size:18px;fill:#000;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.classGroup text{fill:#9370db;stroke:none;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family);font-size:10px}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.classGroup text .title{font-weight:bolder}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.clickable{cursor:pointer}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.classGroup rect{fill:#ECECFF;stroke:#9370db}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.classGroup line{stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD .classLabel .box{stroke:none;stroke-width:0;fill:#ECECFF;opacity:0.5}#mermaid-svg-Vb7A9ZmXTkbQYQLD .classLabel .label{fill:#9370db;font-size:10px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .relation{stroke:#9370db;stroke-width:1;fill:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .dashed-line{stroke-dasharray:3}#mermaid-svg-Vb7A9ZmXTkbQYQLD #compositionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #compositionEnd{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #aggregationStart{fill:#ECECFF;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #aggregationEnd{fill:#ECECFF;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #dependencyStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #dependencyEnd{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #extensionStart{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD #extensionEnd{fill:#9370db;stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD .commit-id,#mermaid-svg-Vb7A9ZmXTkbQYQLD .commit-msg,#mermaid-svg-Vb7A9ZmXTkbQYQLD .branch-label{fill:lightgrey;color:lightgrey;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .pieTitleText{text-anchor:middle;font-size:25px;fill:#000;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .slice{font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.stateGroup text{fill:#9370db;stroke:none;font-size:10px;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.stateGroup text{fill:#9370db;fill:#333;stroke:none;font-size:10px}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.statediagram-cluster .cluster-label text{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.stateGroup .state-title{font-weight:bolder;fill:#000}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.stateGroup rect{fill:#ECECFF;stroke:#9370db}#mermaid-svg-Vb7A9ZmXTkbQYQLD g.stateGroup line{stroke:#9370db;stroke-width:1}#mermaid-svg-Vb7A9ZmXTkbQYQLD .transition{stroke:#9370db;stroke-width:1;fill:none}#mermaid-svg-Vb7A9ZmXTkbQYQLD .stateGroup .composit{fill:white;border-bottom:1px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .stateGroup .alt-composit{fill:#e0e0e0;border-bottom:1px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .state-note{stroke:#aa3;fill:#fff5ad}#mermaid-svg-Vb7A9ZmXTkbQYQLD .state-note text{fill:black;stroke:none;font-size:10px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .stateLabel .box{stroke:none;stroke-width:0;fill:#ECECFF;opacity:0.7}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edgeLabel text{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .stateLabel text{fill:#000;font-size:10px;font-weight:bold;font-family:'trebuchet ms', verdana, arial;font-family:var(--mermaid-font-family)}#mermaid-svg-Vb7A9ZmXTkbQYQLD .node circle.state-start{fill:black;stroke:black}#mermaid-svg-Vb7A9ZmXTkbQYQLD .node circle.state-end{fill:black;stroke:white;stroke-width:1.5}#mermaid-svg-Vb7A9ZmXTkbQYQLD #statediagram-barbEnd{fill:#9370db}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-cluster rect{fill:#ECECFF;stroke:#9370db;stroke-width:1px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-cluster rect.outer{rx:5px;ry:5px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-state .divider{stroke:#9370db}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-state .title-state{rx:5px;ry:5px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-cluster.statediagram-cluster .inner{fill:white}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-cluster.statediagram-cluster-alt .inner{fill:#e0e0e0}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-cluster .inner{rx:0;ry:0}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-state rect.basic{rx:5px;ry:5px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-state rect.divider{stroke-dasharray:10,10;fill:#efefef}#mermaid-svg-Vb7A9ZmXTkbQYQLD .note-edge{stroke-dasharray:5}#mermaid-svg-Vb7A9ZmXTkbQYQLD .statediagram-note rect{fill:#fff5ad;stroke:#aa3;stroke-width:1px;rx:0;ry:0}:root{--mermaid-font-family: '"trebuchet ms", verdana, arial';--mermaid-font-family: "Comic Sans MS", "Comic Sans", cursive}#mermaid-svg-Vb7A9ZmXTkbQYQLD .error-icon{fill:#522}#mermaid-svg-Vb7A9ZmXTkbQYQLD .error-text{fill:#522;stroke:#522}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edge-thickness-normal{stroke-width:2px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edge-thickness-thick{stroke-width:3.5px}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edge-pattern-solid{stroke-dasharray:0}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edge-pattern-dashed{stroke-dasharray:3}#mermaid-svg-Vb7A9ZmXTkbQYQLD .edge-pattern-dotted{stroke-dasharray:2}#mermaid-svg-Vb7A9ZmXTkbQYQLD .marker{fill:#333}#mermaid-svg-Vb7A9ZmXTkbQYQLD .marker.cross{stroke:#333}:root { --mermaid-font-family: "trebuchet ms", verdana, arial;}#mermaid-svg-Vb7A9ZmXTkbQYQLD {color: rgba(0, 0, 0, 0.75);font: ;}

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.Threading.Tasks;
using System.Windows.Forms;namespace SocketTCPService
{public partial class ServerForm : Form{Socket server;//服务器套接字Socket client;//接受客户请求后的套接字byte[] buffer = new byte[1024 * 1024 * 6];//申请6Mb内存Thread th;//监听线程Thread receive;//接收数据线程Dictionary<string, Socket> dict = new Dictionary<string, Socket>();public ServerForm(){InitializeComponent();}#region 启动服务器bool isSer = false;private void buttonStartServer_Click(object sender, EventArgs e){if(!isSer){//1. 初始化套接字server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);//2. 绑定套接字和端口号IPAddress ip = IPAddress.Parse(textBoxServerIP.Text);int port = Convert.ToInt32(textBoxServerPort.Text);server.Bind(new IPEndPoint(ip, port));//3. 监听server.Listen(10);//4. 开启监听线程th = new Thread(new ThreadStart(ListenC));th.IsBackground = true;//设置为后台线程，不需要用户主动关闭th.Start();isSer = true;buttonStartServer.Text = "关闭服务器";buttonStartServer.BackColor = Color.GreenYellow;}else{if(server != null){server.Close();server = null;}if (client != null){client.Close();client = null;}if(th != null){th.Abort();}if (receive != null){receive.Abort();}isSer = false;buttonStartServer.Text = "启动服务器";buttonStartServer.BackColor = Color.LightGray;}}#endregion#region 监听线程public void ListenC(){try{while (true){//等待客户的连接请求client = server.Accept();//阻塞等待dict.Add(client.RemoteEndPoint.ToString(), client);//连接成功Invoke(new MethodInvoker(delegate (){listBoxReceive.Items.Add("连接成功");comboBoxClient.Items.Add(client.RemoteEndPoint.ToString());}));//开启线程receive = new Thread(new ParameterizedThreadStart(RecData));receive.IsBackground = true;receive.Start(client);}}catch (Exception){//throw;}}#endregion#region 接收数据线程public void RecData(object obj){Socket Client = (Socket)obj;int counts = 0;while (true){try{//6. 接收数据counts = Client.Receive(buffer);if (counts > 0){//在控件上显示接收到的数据（字符串）Invoke(new MethodInvoker(delegate (){listBoxReceive.Items.Add(string.Format("客户端{0}说：{1}",Client.RemoteEndPoint.ToString(), Encoding.Default.GetString(buffer,0,counts)));}));}}catch(Exception){//throw;}}}#endregion#region 发送数据private void buttonSend_Click(object sender, EventArgs e){if(!isSer){MessageBox.Show("未启动服务器");}string ip = comboBoxClient.SelectedItem.ToString();            byte[] buffer = Encoding.Default.GetBytes(textBoxSend.Text);dict[ip].Send(buffer);//client.Send(buffer);}#endregionprivate void buttonClear_Click(object sender, EventArgs e){listBoxReceive.Items.Clear();}}
}

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.Threading.Tasks;
using System.Windows.Forms;namespace SocketTCPClient
{public partial class FormClient : Form{#region 构造函数public FormClient(){InitializeComponent();}#endregion#region 变量Socket ClientSocket;//套接字byte[] buffer = new byte[1024 * 1024 * 6];bool isConnect = false;Thread th;#endregion#region 连接服务器 初始化套接字private void buttonConnect_Click(object sender, EventArgs e){try{if(!isConnect){//1. 初始化套接字ClientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//2. 连接服务器IPAddress ip = IPAddress.Parse(textBoxIP.Text);int port = Convert.ToInt32(textBoxPort.Text);ClientSocket.Connect(new IPEndPoint(ip, port));isConnect = true;buttonConnect.Text = "断开服务器";buttonConnect.BackColor = Color.LawnGreen;//3. 开启线程th = new Thread(RecData);th.IsBackground = true;th.Start();}else{if (ClientSocket != null){ClientSocket.Close();isConnect = false;buttonConnect.Text = "连接服务器";buttonConnect.BackColor = Color.LightGray;}if(th != null){th.Abort();th = null;}                       }}catch (Exception){MessageBox.Show("连接失败，请检查是否启动了服务器", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);//throw;}}#endregion#region 接收数据线程public void RecData(){            int counts = 0;while (true){counts = ClientSocket.Receive(buffer);if (counts > 0){Invoke(new MethodInvoker(delegate (){listBoxRec.Items.Add(string.Format("服务器说：{0}",Encoding.Default.GetString(buffer,0,counts)));}));}}}#endregion#region 发送private void buttonSend_Click(object sender, EventArgs e){if(isConnect){byte[] buffer = Encoding.Default.GetBytes(textBoxSend.Text);ClientSocket.Send(buffer);}else{MessageBox.Show("客户端未连接到服务器", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);}}#endregionprivate void buttonClear_Click(object sender, EventArgs e){listBoxRec.Items.Clear();}}
}