//进程id
            int pid = ProcInfo.ProcessID;
            
            //存放进程使用的端口号链表
            List<int> ports = new List<int>();

            Process pro = new Process();
            pro.StartInfo.FileName = "cmd.exe";
            pro.StartInfo.UseShellExecute = false;
            pro.StartInfo.RedirectStandardInput = true;
            pro.StartInfo.RedirectStandardOutput = true;
            pro.StartInfo.RedirectStandardError = true;
            pro.StartInfo.CreateNoWindow = true;
            pro.Start();
            pro.StandardInput.WriteLine("netstat -ano");
            pro.StandardInput.WriteLine("exit");
            Regex reg = new Regex("\\s+", RegexOptions.Compiled);
            string line = null;
            ports.Clear();
            while ((line = pro.StandardOutput.ReadLine()) != null)
            {
                line = line.Trim();
                if (line.StartsWith("TCP", StringComparison.OrdinalIgnoreCase))
                {
                    line = reg.Replace(line, ",");
                    string[] arr = line.Split(',');
                    if (arr[4] == pid.ToString())
                    {
                        string soc = arr[1];
                        int pos = soc.LastIndexOf(':');
                        int pot = int.Parse(soc.Substring(pos + 1));
                        ports.Add(pot);
                    }
                }
                else if (line.StartsWith("UDP", StringComparison.OrdinalIgnoreCase))
                {
                    line = reg.Replace(line, ",");
                    string[] arr = line.Split(',');
                    if (arr[3] == pid.ToString())
                    {
                        string soc = arr[1];
                        int pos = soc.LastIndexOf(':');
                        int pot = int.Parse(soc.Substring(pos + 1));
                        ports.Add(pot);
                    }
                }
            }
            pro.Close();

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace ProcessorPortDllTest
{
    public enum TcpOrUdp
    {
        TcpType,
        UdpType
    };

    public class ProcessPortHelper
    {
        [DllImport("ProcessorPort.dll",CallingConvention = CallingConvention.StdCall)]
        public extern static uint GetProcessIdByPort(TcpOrUdp type, uint dwPort);

        [DllImport("ProcessorPort.dll",CallingConvention = CallingConvention.StdCall)]
        public extern static uint GetAllPortByProcessId(TcpOrUdp type, uint dwProcessId, uint[] dwAllPort, uint dwMaxLen);
    }

    class Program
    {
        static void Main(string[] args)
        {
            uint port = 1025;
            uint processorId = ProcessPortHelper.GetProcessIdByPort(TcpOrUdp.TcpType, port);
            Console.WriteLine("Port {0} is using by processor {1}",port,processorId);

            uint processorId1 = 1072;

            uint[] TcpPorts = new uint[100];
            uint count = ProcessPortHelper.GetAllPortByProcessId(TcpOrUdp.TcpType, processorId1, TcpPorts, (uint)TcpPorts.Length);
            Console.WriteLine("Processor {0} is using TCP port: ", processorId1);
            for (uint i = 0; i < count; ++i)
            {
                Console.WriteLine(TcpPorts[i]);
            }

            uint[] UdpPorts = new uint[100];
            uint count1 = ProcessPortHelper.GetAllPortByProcessId(TcpOrUdp.UdpType, processorId1, UdpPorts, (uint)UdpPorts.Length);
            Console.WriteLine("Processor {0} is using UDP port: ", processorId1);
            for (uint i = 0; i < count1; ++i)
            {
                Console.WriteLine(UdpPorts[i]);
            }


Console.ReadKey();
        }
    }
}