socket测试远程地址能否连接并为连接设置超时（转）

public   class TestConnect

{

string hostIp = "";

int port = 3314;

public string recMsg = "";

Socket socketC = null;

private readonly ManualResetEvent TimeoutObject = new ManualResetEvent(false);

public TestConnect(string hostIp, int port)

{

this.hostIp = hostIp;

this.port = port;

}

public bool connect()

{

///创建终结点（EndPoint）

IPAddress ip = IPAddress.Parse(hostIp);//把ip地址字符串转换为IPAddress类型的实例

IPEndPoint ipe = new IPEndPoint(ip, port);//用指定的端口和ip初始化IPEndPoint类的新实例

///创建socket

socketC = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个socket对像，如果用udp协议，则要用SocketType.Dgram类型的套接字

try

{

return Connect(ipe,3000);

}

catch (SocketException ex)

{

socketC.Close();

socketC = null;

return false;

}

}

/// <summary>

/// Socket连接请求

/// </summary>

/// <param name="remoteEndPoint">网络端点</param>

/// <param name="timeoutMSec">超时时间</param>

public bool Connect(IPEndPoint remoteEndPoint, int timeoutMSec)

{

TimeoutObject.Reset();

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

socketC.BeginConnect(remoteEndPoint, CallBackMethod, socketC);

//阻塞当前线程

if (TimeoutObject.WaitOne(timeoutMSec, false))

{

return true;

}

else

{

return false;

}

}

//--异步回调方法

private void CallBackMethod(IAsyncResult asyncresult)

{

//使阻塞的线程继续

Socket socket = asyncresult.AsyncState as Socket;

if (socket.Connected)

{

socket.EndConnect(asyncresult);

}

TimeoutObject.Set();

}

public void testOnline(string msg)

{

socketC.Send(Encoding.GetEncoding("gb2312").GetBytes(msg));

　　　　　　try

　　　　　　{

//创建一个通信线程

ParameterizedThreadStart pts = new ParameterizedThreadStart(ServerRecMsg);

Thread thr = new Thread(pts);

thr.IsBackground = true;

//启动线程

thr.Start(socketC);

　　　　　　}

　　　　　　catch

　　　　　　{ throw ;}

　　　　}

　　

　　 /// <summary>

/// 接收客户端发来的信息

/// </summary>

/// <param name="socketClientPara">客户端套接字对象</param>

private void ServerRecMsg(object socketClientPara)

{

Socket socketServer = socketClientPara as Socket;

byte[] arrServerRecMsg = new byte[100];

int len;

while ((len = socketServer.Receive(arrServerRecMsg)) != 0)

{

//将机器接受到的字节数组转换为人可以读懂的字符串

recMsg = Encoding.Default.GetString(arrServerRecMsg, 0, len);

if (recMsg == "online")

{

break;

}

}

}

}