private void t_btn_kill_Click(object sender, EventArgs e)

        {

            int port;

            bool b = int.TryParse(t_txt_guardport.Text, out port);

            if (!b)

            {

                MessageBox.Show("请输入正确的监听端口");

                return;

            }

            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);

            if (list_pid.Count == )

            {

                MessageBox.Show("操作完成");

                return;

            }

            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？");

            if (MessageBox.Show(sb.ToString(), "系统提示", MessageBoxButtons.YesNo) == DialogResult.No)

                return;

            PidKill(p, list_pid);

            MessageBox.Show("操作完成");

        }

        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>();

            while (!reader.EndOfStream)

            {

                strLine = strLine.Trim();

                if (strLine.Length >  && ((strLine.Contains("TCP") || strLine.Contains("UDP"))))

                {

                    Regex r = new Regex(@"\s+");

                    string[] strArr = r.Split(strLine);

                    if (strArr.Length >= )

                    {

                        b = int.TryParse(strArr[], out result);

                        if (b && !list_pid.Contains(result))

                            list_pid.Add(result);

                    }

                }

                strLine = reader.ReadLine();

            }

            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>();

            foreach (var pid in list_pid)

            {

                p.StandardInput.WriteLine(string.Format("tasklist |find \"{0}\"", pid));

                p.StandardInput.WriteLine("exit");

                StreamReader 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 >  && ((strLine.Contains(".exe"))))

                    {

                        Regex r = new Regex(@"\s+");

                        string[] strArr = r.Split(strLine);

                        if (strArr.Length > )

                        {

                            list_process.Add(strArr[]);

                        }

                    }

                    strLine = reader.ReadLine();

                }

                p.WaitForExit();

                reader.Close();

            }

            p.Close();

            return list_process;

        }