C# 查看本机端口的可用情况

先引入命名空间：

using System.Collections;
using System.Management;
using System.Net;
using System.Net.Sockets;

再编写代码如下：

public void scanPort()
        {
            string availPorts = "";
            string usedPorts = "";
            ManagementClass manage = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection objCollection = manage.GetInstances();
            ArrayList ips = new ArrayList();
            foreach(ManagementObject obj in objCollection )
            {
                if((bool)obj["IPEnabled"])
                {
                    Array ipArray = (Array)obj.Properties["IPAddress"].Value;
                    ips.Add(ipArray.GetValue(0).ToString());
                }
            }
            ips.Add("127.0.0.1");
            ips.Add("0.0.0.0");


            string ports = "";
            Socket sock;
            IPEndPoint endPoint;
            for (int i = 2; i < 10000; i++)
            {
                             
                for (int j = 0; j < ips.Count; j++)
                {
                    try
                    {
                        if (i ==1031)
                        {
                            string aaa = "";
                        }
                        sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                        endPoint = new IPEndPoint(IPAddress.Parse(ips[j].ToString()), i);
                        sock.Bind(endPoint);
                        sock.Close();
                        
                        availPorts += "|" + i;
                        
                    }
                    catch(Exception ex)
                    {
                        
                        usedPorts += "|" + i;
                        break;
                    }
                }
                
                      
            }

            availPorts += "end";
            usedPorts += "end";
        }

结果中：

availPorts 为可用端口

usedPorts 为已使用端口