This article describes the method of C# to detect whether the remote computer port is open. Share it for your reference. The specific analysis is as follows:
This C# code is used to detect whether the 3389 port of the remote computer is handled with the open state. Other ports can be set according to actual needs.
using System;
using ;
using ;
using ;
namespace test
{
class Program
{
static void Main(string[] args)
{
GetTcpConnections();
}
public static void GetTcpConnections()
{
IPGlobalProperties properties = ();
TcpConnectionInformation[] connections = ();
foreach (TcpConnectionInformation t in connections)
{
("Local endpoint: {0} ", ());
("Remote endpoint: {0} ", ());
("{0}", );
}
();
();
}
}
}
The operation results are as follows:
Local endpoint: 127.0.0.1:1025 Remote endpoint: 127.0.0.1:1026 Established Local endpoint: 127.0.0.1:1026 Remote endpoint: 127.0.0.1:1025 Established Local endpoint: 127.0.0.1:1028 Remote endpoint: 127.0.0.1:16992 CloseWait Local endpoint: 127.0.0.1:1110 Remote endpoint: 127.0.0.1:4900 Established Local endpoint: 127.0.0.1:2754 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:2762 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:2773 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:2913 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:3014 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:3531 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:4012 Remote endpoint: 127.0.0.1:1110 CloseWait Local endpoint: 127.0.0.1:4900 Remote endpoint: 127.0.0.1:1110 Established
I hope this article will be helpful to everyone's C# programming.