using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Text.RegularExpressions;

namespace HTEXKiller
{
    class Program
    {

        /// <summary>
        /// kill指定端口的PID进程。
        /// </summary>
        /// <param name="args"></param>
        static void Main(string[] args)
        {
            int port = 9527;
            Process p = new Process();
            p.StartInfo.FileName = "cmd.exe";
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.CreateNoWindow = true;
            List<int> list_pid = GetPidByPort(p, port);

            List<string> list_process = GetProcessNameByPid(p, list_pid);
            StringBuilder sb = new StringBuilder();
            sb.AppendLine("占用" + port + "端口的进程有:");
            foreach (var item in list_process)
            {
                sb.Append(item + "\r\n");
            }
            sb.AppendLine("是否要结束这些进程？");
            Console.WriteLine(sb);
           
            PidKill(p, list_pid);
            Console.ReadLine();
        }
        private static void PidKill(Process p, List<int> list_pid)
        {
            p.Start();
            foreach (var item in list_pid)
            {
                p.StandardInput.WriteLine("taskkill /pid " + item + " /f");
                p.StandardInput.WriteLine("exit");
            }
            p.Close();
        }

        private static List<int> GetPidByPort(Process p, int port)
        {
            int result;
            bool b = true;
            p.Start();
            p.StandardInput.WriteLine(string.Format("netstat -ano|find \"{0}\"", port));
            p.StandardInput.WriteLine("exit");
            StreamReader reader = p.StandardOutput;
            string strLine = reader.ReadLine();
            List<int> list_pid = new List<int>();
            StringBuilder sb = new StringBuilder();
            while (!reader.EndOfStream)
            {
                strLine = strLine.Trim();
                if (strLine.Length > 0 && ((strLine.Contains("TCP") || strLine.Contains("UDP"))))
                {
                    Regex r = new Regex(@"\s+");
                    string[] strArr = r.Split(strLine);
                    for (int i = 2; i < strArr.Length; i++) {
                        b = int.TryParse(strArr[i], out result);
                        if (b && !list_pid.Contains(result))
                            list_pid.Add(result);
                    }
                }
                strLine = reader.ReadLine();
                sb.Append(strLine);
            }
            p.WaitForExit();
            reader.Close();
            p.Close();
            return list_pid;
        }

        private static List<string> GetProcessNameByPid(Process p, List<int> list_pid)
        {
            p.Start();
            List<string> list_process = new List<string>();
            StreamReader reader = null;
            foreach (var pid in list_pid)
            {
                p.StandardInput.WriteLine(string.Format("tasklist |find \"{0}\"", pid));
                p.StandardInput.WriteLine("exit");
                reader = p.StandardOutput;//截取输出流
                string strLine = reader.ReadLine();//每次读取一行
            
                while (!reader.EndOfStream)
                {
                    strLine = strLine.Trim();
                    if (strLine.Length > 0 && ((strLine.Contains(".exe"))))
                    {
                        Regex r = new Regex(@"\s+");
                        string[] strArr = r.Split(strLine);
                        if (strArr.Length > 0)
                        {
                            list_process.Add(strArr[0]);
                        }
                    }
                    strLine = reader.ReadLine();
                }
                p.WaitForExit();

            }
            if (reader != null) {
                reader.Close();
            }
            p.Close();

            return list_process;
        }
    }
}