C#中Socket通信用法实例详解

本文实例讲述了C#中Socket通信用法。分享给大家供大家参考。具体如下：

一、UDP方式：

服务器端代码:

static void Main(string[] args)

{

int recv;

byte[] data = new byte[1024];

IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 9050);//定义一网络端点

Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);//定义一个Socket

newsock.Bind(ipep);//Socket与本地的一个终结点相关联

Console.WriteLine("Waiting for a client..");

IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);//定义要发送的计算机的地址

EndPoint Remote = (EndPoint)(sender);//

recv = newsock.ReceiveFrom(data, ref Remote);//接受数据

Console.WriteLine("Message received from{0}:", Remote.ToString());

Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

string welcome = "Welcome to my test server!";

data = Encoding.ASCII.GetBytes(welcome);

newsock.SendTo(data, data.Length, SocketFlags.None, Remote);

while (true)

{

data = new byte[1024];

recv = newsock.ReceiveFrom(data, ref Remote);

Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

newsock.SendTo(data, recv, SocketFlags.None, Remote);

}

客户端代码:

void MainInfo()

{

byte[] data = new byte[1024];//定义一个数组用来做数据的缓冲区

string input, stringData;

IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.1.21"), 9050);

Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);

string welcome = "Hello,are you there?";

data = Encoding.ASCII.GetBytes(welcome);

server.SendTo(data, data.Length, SocketFlags.None, ipep);//将数据发送到指定的终结点

IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);

EndPoint Remote = (EndPoint)sender;

data = new byte[1024];

int recv = server.ReceiveFrom(data, ref Remote);//接受来自服务器的数据

Console.WriteLine("Message received from{0}:", Remote.ToString());

Console.WriteLine(Encoding.ASCII.GetString(data, 0, recv));

while (true)//读取数据

{

input = richTextBox1.Text;//从键盘读取数据

if (input == "text")//结束标记

{

break;

}

server.SendTo(Encoding.ASCII.GetBytes(input), Remote);//将数据发送到指定的终结点Remote

data = new byte[1024];

recv = server.ReceiveFrom(data, ref Remote);//从Remote接受数据

stringData = Encoding.ASCII.GetString(data, 0, recv);

Console.WriteLine(stringData);

}

Console.WriteLine("Stopping client");

server.Close();

}

二、TCP方式:

服务器端代码:

Socket serverSocket = null;

Thread clientThread = null;

Socket clientSocket = null;

Thread thread = null;

IPAddress ips = null;

PEndPoint ipep = null;

void ServerStart()

{

ips = Dns.GetHostAddresses(Dns.GetHostName())[0];

//创建IPEndPoint实例

ipep = new IPEndPoint(ips, 9050);

//创建一个套接字

serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

serverSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);

//将所创建的套接字与IPEndPoint绑定

serverSocket.Bind(ipep);

//设置套接字为收听模式

serverSocket.Listen(20);

while (listenalive)

{

try

{

//在套接字上接收接入的连接

clientSocket = serverSocket.Accept();

clientThread = new Thread(new ParameterizedThreadStart(ReceiveData));

clientThread.Start(clientSocket);

}

catch (Exception ex)

{

WriteErrorLog(ex.Message);

serverSocket.Close();

serverSocket = null;

}

static void ReceiveData(object obj)

{

bool keepalive = true;

Socket s = obj as Socket;

Byte[] buffer = new Byte[1024];

//根据收听到的客户端套接字向客户端发送信息

IPEndPoint clientep = (IPEndPoint)s.RemoteEndPoint;

Console.WriteLine("客户端ip:" + clientep.Address + " 端口:" + clientep.Port);

string welcome = "连接服务器成功";

buffer = System.Text.Encoding.Unicode.GetBytes(welcome);

//向客户端发送“连接服务器成功”消息

s.Send(buffer, buffer.Length, SocketFlags.None);

buffer = new Byte[1024];

int bufLen = 0;

string content = string.Empty;

while (true)

{

//在套接字上接收客户端发送的信息

bufLen = 0;

try

{

bufLen = s.Receive(buffer);

if (bufLen == 0)

{

break;

}

content += System.Text.Encoding.Unicode.GetString(buffer, 0, bufLen);

}

catch (Exception ex)

{

break; ;

}

Send(s, content);

s = null;

buffer = null;

clientep = null;

Thread.CurrentThread.Abort();

}

客户端代码:

void Send(string content)

{

byte[] data = new byte[1024];

newclient = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily.InterNetwork, System.Net.Sockets.SocketType.Stream, System.Net.Sockets.ProtocolType.Tcp);

ie = new System.Net.IPEndPoint(System.Net.IPAddress.Parse(ipadd), port);//服务器的IP和端口

try

{

//因为客户端只是用来向特定的服务器发送信息，所以不需要绑定本机的IP和端口。不需要监听。

newclient.Connect(ie);

}

catch (System.Net.Sockets.SocketException e)

{

Console.WriteLine(e.ToString());

return;

}

int recv = newclient.Receive(data);

//连接服务器成功

string stringdata = System.Text.Encoding.Unicode.GetString(data, 0, recv);

if (stringdata == "连接服务器成功")

{

newclient.Send(System.Text.Encoding.Unicode.GetBytes(content));

newclient.Shutdown(System.Net.Sockets.SocketShutdown.Send);

data = new byte[1024];

recv = newclient.Receive(data);

string result = System.Text.Encoding.Unicode.GetString(data, 0, recv);

newclient.Shutdown(System.Net.Sockets.SocketShutdown.Receive);

newclient.Close();

MessageBox.Show(result);

}

else

{

MessageBox.Show("连接服务器失败", "友情提示");

}

希望本文所述对大家的C#程序设计有所帮助。

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