对于Socket来说，链接类型一般分为长连接和短连接。
长连接和短连接在程序上基本没有区别，区别是短连接每次发送完消息都要调用Close()方法来释放资源，而长连接则不调用Close()方法，从而保持持续不断的通信功能。
GitHub代码服务端：https://github.com/yangwohenmai/TEST/tree/master/SocketServer
GitHub代码客户端：https://github.com/yangwohenmai/TEST/tree/master/SocketClient
分为两个项目，一个Socket服务端和一个Socket客户端。结构如下：
Socket长连接效果图如下，可以持续的发送消息，不需要重复链接：
Socket服务端代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace SocketServer
{
class Program
{
static Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
private static byte[] result = new byte[1024];
static void Main(string[] args)
{
SocketServie();
}
public static void SocketServie()
{
Console.WriteLine("服务端已启动");
string host = "127.0.0.1";//IP地址
int port = 2000;//端口
socket.Bind(new IPEndPoint(IPAddress.Parse(host), port));
socket.Listen(100);//设定最多100个排队连接请求
Thread myThread = new Thread(ListenClientConnect);//通过多线程监听客户端连接
myThread.Start();
Console.ReadLine();
}
/// <summary>
/// 监听客户端连接
/// </summary>
private static void ListenClientConnect()
{
while (true)
{
Socket clientSocket = socket.Accept();
clientSocket.Send(Encoding.UTF8.GetBytes("我是服务器"));
Thread receiveThread = new Thread(ReceiveMessage);
receiveThread.Start(clientSocket);
}
}
/// <summary>
/// 接收消息
/// </summary>
/// <param name="clientSocket"></param>
private static void ReceiveMessage(object clientSocket)
{
Socket myClientSocket = (Socket)clientSocket;
while (true)
{
try
{
//通过clientSocket接收数据
int receiveNumber = myClientSocket.Receive(result);
if (receiveNumber == 0)
return;
Console.WriteLine("接收客户端{0} 的消息：{1}", myClientSocket.RemoteEndPoint.ToString(), Encoding.UTF8.GetString(result, 0, receiveNumber));
//给Client端返回信息
string sendStr = "已成功接到您发送的消息";
byte[] bs = Encoding.UTF8.GetBytes(sendStr);//Encoding.UTF8.GetBytes()不然中文会乱码
myClientSocket.Send(bs, bs.Length, 0); //返回信息给客户端
//myClientSocket.Close(); //发送完数据关闭Socket并释放资源//长连接的话就不关闭
//Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
myClientSocket.Close();//关闭Socket并释放资源
myClientSocket.Shutdown(SocketShutdown.Both);//禁止发送和上传
break;
}
}
}
}
}
Socket客户端代码：
代码中包含两个方法，分别是长连接和短连接方法。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
namespace SocketClient
{
class Program
{
static void Main(string[] args)
{
//短连接
shotlink("");
//长连接
//longlink();
}
/// <summary>
/// 短连接，最后调用Close释放资源
/// </summary>
/// <param name="input"></param>
public static void shotlink(string input)
{
//设定服务器IP地址
IPAddress ip = IPAddress.Parse("127.0.0.1");
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
clientSocket.Connect(new IPEndPoint(ip, 2000)); //配置服务器IP与端口
Console.WriteLine("连接服务器成功");
}
catch
{
Console.WriteLine("连接服务器失败，请按回车键退出！");
Console.ReadLine();
return;
}
string sendMessage = "你好";//发送到服务端的内容
clientSocket.Send(Encoding.UTF8.GetBytes(sendMessage));//向服务器发送数据，需要发送中文则需要使用Encoding.UTF8.GetBytes()，否则会乱码
Console.WriteLine("向服务器发送消息：" + sendMessage);
//接受从服务器返回的信息
string recvStr = "";
byte[] recvBytes = new byte[1024];
int bytes;
bytes = clientSocket.Receive(recvBytes, recvBytes.Length, 0); //从服务器端接受返回信息
recvStr += Encoding.UTF8.GetString(recvBytes, 0, bytes);
Console.WriteLine("服务端发来消息：{0}", recvStr);//回显服务器的返回信息
//每次完成通信后，关闭连接并释放资源
clientSocket.Close();
Console.ReadLine();
}
/// <summary>
/// 长连接不调用Close释放资源
/// </summary>
public static void longlink()
{
//设定服务器IP地址
IPAddress ip = IPAddress.Parse("127.0.0.1");
Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
try
{
clientSocket.Connect(new IPEndPoint(ip, 2000)); //配置服务器IP与端口
Console.WriteLine("连接服务器成功");
}
catch
{
Console.WriteLine("连接服务器失败，请按回车键退出！");
Console.ReadLine();
return;
}
//循环读取输入数据
while (true)
{
Console.WriteLine("请输入");
string sentstr = Console.ReadLine();
SentMsg(sentstr, clientSocket);
}
}
/// <summary>
/// 长连接，不释放资源
/// </summary>
/// <param name="sentstr"></param>
/// <param name="clientSocket"></param>
public static void SentMsg(string sentstr, Socket clientSocket)
{
string sendMessage = "你好";//发送到服务端的内容
sendMessage = sentstr;//发送到服务端的内容
//向服务器发送数据，需要发送中文则需要使用Encoding.UTF8.GetBytes()，否则会乱码
clientSocket.Send(Encoding.UTF8.GetBytes(sendMessage));
Console.WriteLine("向服务器发送消息：" + sendMessage);
//接受从服务器返回的信息
string recvStr = "";
byte[] recvBytes = new byte[1024];
int bytes;
bytes = clientSocket.Receive(recvBytes, recvBytes.Length, 0); //从服务器端接受返回信息
recvStr += Encoding.UTF8.GetString(recvBytes, 0, bytes);
Console.WriteLine("服务端发来消息：{0}", recvStr); //回显服务器的返回信息
//clientSocket.Close();//关闭连接并释放资源//如果是长连接，注释掉close
}
}
}
本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
