在给定服务器的IP地址的情况下,如何使用C#测试与服务器的连接？

Question

如何使用C#以编程方式确定是否可以访问具有给定IP地址的服务器？

Answer 1

您可以使用Ping类(.NET 2.0及更高版本)

    Ping x = new Ping();
    PingReply reply = x.Send(IPAddress.Parse("127.0.0.1"));

    if(reply.Status == IPStatus.Success)
        Console.WriteLine("Address is accessible");

您可能希望在生产系统中使用异步方法以允许取消等.

Answer 2

假设您的意思是通过TCP套接字:

IPAddress IP;
if(IPAddress.TryParse("127.0.0.1",out IP)){
    Socket s = new Socket(AddressFamily.InterNetwork,
    SocketType.Stream,
    ProtocolType.Tcp);

    try{   
        s.Connect(IPs[0], port);
    }
    catch(Exception ex){
        // something went wrong
    }
}

有关更多信息:http://msdn.microsoft.com/en-us/library/4xzx2d41.aspx？ppud = 4

Answer 3

声明字符串地址和int端口,您就可以通过TcpClient类进行连接了.

System.Net.Sockets.TcpClient client = new TcpClient();
try
{
    client.Connect(address, port);
    Console.WriteLine("Connection open, host active");
} catch (SocketException ex)
{
    Console.WriteLine("Connection could not be established due to: \n" + ex.Message);
}
finally
{
    client.Close();
}