使用tcp协议，链接服务器的方法
/// <summary> /// 连接使用tcp协议的服务端 /// </summary> /// <param name="ip">服务端的ip</param> /// <param name="port">服务端的端口号</param> /// <returns></returns> public static Socket ConnectServer(string ip, int port) { Socket s = null; try { IPAddress ipAddress = IPAddress.Parse(ip); IPEndPoint ipEndPoint = new IPEndPoint(ipAddress, port); s = new Socket(ipEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp); s.Connect(ipEndPoint); if (s.Connected == false) s = null; } catch (Exception) { } return s; }
发送数据：
/// <summary> /// 向远程主机发送数据 /// </summary> /// <param name="socket">连接到远程主机的socket</param> /// <param name="buffer">待发送数据</param> /// <param name="outTime">发送超时时长，单位是秒(为-1时，将一直等待直到有数据需要发送)</param> /// <returns>0:发送成功；-1:超时；-2:出现错误；-3:出现异常</returns> public static int SendData(Socket socket, byte[] buffer, int outTime) { if (socket == null || socket.Connected == false) { throw new ArgumentException("参数socket为null，或者未连接到远程计算机"); } if (buffer == null || buffer.Length == 0) { throw new ArgumentException("参数buffer为null ,或者长度为 0"); } int flag = 0; try { int left = buffer.Length; int sndLen = 0; int hasSend = 0; while (true) { if ((socket.Poll(outTime * 1000, SelectMode.SelectWrite) == true)) { // 收集了足够多的传出数据后开始发送 sndLen = socket.Send(buffer, hasSend, left, SocketFlags.None); left -= sndLen; hasSend += sndLen; // 数据已经全部发送 if (left == 0) { flag = 0; break; } else { // 数据部分已经被发送 if (sndLen > 0) { continue; } else // 发送数据发生错误 { flag = -2; break; } } } else // 超时退出 { flag = -1; break; } } } catch (SocketException) { //Log flag = -3; } return flag; }
发送string数据，用到方法System.Text.Encoding.Default.GetBytes对上面的方法进行封装
/// <summary> /// 向远程主机发送数据 /// </summary> /// <param name="socket">连接到远程主机的socket</param> /// <param name="buffer">待发送的字符串</param> /// <param name="outTime">发送数据的超时时间，单位是秒(为-1时，将一直等待直到有数据需要发送)</param> /// <returns>0:发送数据成功；-1:超时；-2:错误；-3:异常</returns> public static int SendData(Socket socket, string buffer, int outTime) { if (buffer == null || buffer.Length == 0) { throw new ArgumentException("buffer为null或则长度为0."); } return SendData(socket, System.Text.Encoding.Default.GetBytes(buffer), outTime); }
接收数据：
/// <summary> /// 接收远程主机发送的数据 /// </summary> /// <param name="socket">要接收数据且已经连接到远程主机的</param> /// <param name="buffer">接收数据的缓冲区(需要接收的数据的长度，由 buffer 的长度决定)</param> /// <param name="outTime">接收数据的超时时间，单位秒(指定为-1时，将一直等待直到有数据需要接收)</param> /// <returns></returns> public static int RecvData(Socket socket, byte[] buffer, int outTime) { if (socket == null || socket.Connected == false) { throw new ArgumentException("socket为null，或者未连接到远程计算机"); } if (buffer == null || buffer.Length == 0) { throw new ArgumentException("buffer为null ,或者长度为 0"); } buffer.Initialize(); int left = buffer.Length; int curRcv = 0; int hasRecv=0; int flag = 0; try { while (true) { if (socket.Poll(outTime * 1000, SelectMode.SelectRead) == true) { // 已经有数据等待接收 curRcv = socket.Receive(buffer, hasRecv, left, SocketFlags.None); left -= curRcv; hasRecv += curRcv; // 数据已经全部接收 if (left == 0) { flag = 0; break; } else { // 数据已经部分接收 if (curRcv > 0) { continue; } else // 出现错误 { flag = -2; break; } } } else // 超时退出 { flag = -1; break; } } } catch (SocketException) { //Log flag = -3; } return flag; }
原文地址：http://blog.csdn.net/love__coder/article/details/6649688
