在C#如何检测某IP的某端口是否打开（类似于TELNET）？

[jingxijun]

如题

[lookfeng]

socket.connect一下

[jamesfay]

楼上

[desailly]

顶一下

[jingxijun]

能举个例子么？

[jingxijun]

up

[bingbingcha]

就是用Socket.Connect连接IP地址的指定端口...捕捉Exception..

代码如下:
static void Main(string[] args)
{
IPAddress ip = IPAddress.Parse("127.0.0.1");
for (int i = 0; i < 1024 ;i++) {
try {
IPEndPoint point = new IPEndPoint(ip,i);
Socket sock = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);
sock.Connect(point);
Console.WriteLine("连接端口{0}成功!",point);
}catch(SocketException e) {
if (e.ErrorCode != 10061) {
Console.WriteLine(e.Message);
}
Console.WriteLine("连接{0}失败", i);
}

}
}