Question

C# winform点击按钮执行telnet登陆，并且执行命令，返回结果，求代码示例。

C# winform点击按钮执行telnet登陆，并且执行命令，返回结果，求代码示例。

Answer 1

//我自己用的telnetHelper类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;
using System.Threading;
namespace AFC_APP1
{
    public class TelnetHelper2
    {
        string hostName;
        string login;
        string password;
        int port = 23;
        IPAddress ipAdd;
        IPEndPoint ipEnd;
        Socket mysocket;
        /// <summary>
        /// 默认构造函数
        /// </summary>
        public TelnetHelper2()
        { 
        
        }
        /// <summary>
        /// 构造函数
        /// </summary>
        /// <param name="hostName"></param>
        /// <param name="login"></param>
        /// <param name="password"></param>
        public TelnetHelper2(string hostName,string login,string password)
        {
            this.hostName = hostName;
            this.login = login;
            this.password = password;
            ipAdd=IPAddress.Parse(hostName);
            ipEnd = new IPEndPoint(ipAdd, port);
            mysocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        }
        /// <summary>
        /// 连接
        /// </summary>
        private void ConnetServer()
        {
            char[] sendfirst = new char[3];
            sendfirst[0] = (char)(255);
            sendfirst[1] = (char)(252);
            sendfirst[2] = (char)(24);
            byte[] sendfirstbytetemp = Encoding.Unicode.GetBytes(sendfirst);
            byte[] sendfirstbyte = new byte[sendfirstbytetemp.Length / 2];
            sendfirstbyte[0] = sendfirstbytetemp[0];
            sendfirstbyte[1] = sendfirstbytetemp[2];
            sendfirstbyte[2] = sendfirstbytetemp[4];
            mysocket.Send(sendfirstbyte, 0, sendfirstbyte.Length, SocketFlags.None);
            Thread.Sleep(300);
            byte[] sendusernametemp = Encoding.ASCII.GetBytes(login);
            byte[] sendusername = new byte[sendusernametemp.Length + 1];
            char[] closechar = new char[2];
            closechar[0] = (char)(10);
            closechar[1] = (char)(13);
            byte[] closebyte = Encoding.ASCII.GetBytes(closechar);
            for (int i = 0; i < sendusernametemp.Length; i++)
            {
                sendusername[i] = sendusernametemp[i];
            }
            sendusername[sendusername.Length - 1] = closebyte[0];
            mysocket.Send(sendusername, 0, sendusername.Length, SocketFlags.None);
            Thread.Sleep(300);
            byte[] senduserpasswdtemp = Encoding.ASCII.GetBytes(password);
            byte[] senduserpasswd = new byte[senduserpasswdtemp.Length + 1];
            char[] closechar2 = new char[2];
            closechar2[0] = (char)(10);
            closechar2[1] = (char)(13);
            byte[] closebyte2 = Encoding.ASCII.GetBytes(closechar2);
            for (int i = 0; i < senduserpasswdtemp.Length; i++)
            {
                senduserpasswd[i] = senduserpasswdtemp[i];
            }
            senduserpasswd[senduserpasswd.Length - 1] = closebyte2[0];
            mysocket.Send(senduserpasswd, 0, senduserpasswd.Length, SocketFlags.None);
            Thread.Sleep(500);
        }
        /// <summary>
        /// 执行命令
        /// </summary>
        /// <param name="cmd"></param>
        private void ExcuteCommand(string cmd)
        {
            char[] sendfirst = new char[3];
            sendfirst[0] = (char)(255);
            sendfirst[1] = (char)(252);
            sendfirst[2] = (char)(24);
            byte[] sendfirstbytetemp = Encoding.Unicode.GetBytes(sendfirst);
            byte[] sendfirstbyte = new byte[sendfirstbytetemp.Length / 2];
            sendfirstbyte[0] = sendfirstbytetemp[0];
            sendfirstbyte[1] = sendfirstbytetemp[2];
            sendfirstbyte[2] = sendfirstbytetemp[4];
            mysocket.Send(sendfirstbyte, 0, sendfirstbyte.Length, SocketFlags.None);
            Thread.Sleep(300);
            byte[] recvdatauser = new byte[4096];
            mysocket.Receive(recvdatauser, 0, mysocket.Available, SocketFlags.None);
            string recvuserstr = Encoding.ASCII.GetString(recvdatauser);
            recvuserstr = recvuserstr.Substring(login.Length, recvuserstr.Length - login.Length);//去掉了服务器回显的用户名
            recvuserstr = recvuserstr.TrimEnd('\0');
            Console.Write(recvuserstr);
            Thread.Sleep(300);
            byte[] sendusernametemp = Encoding.ASCII.GetBytes(cmd);
            byte[] sendusername = new byte[sendusernametemp.Length + 1];
            char[] closechar = new char[2];
            closechar[0] = (char)(10);
            closechar[1] = (char)(13);
            byte[] closebyte = Encoding.ASCII.GetBytes(closechar);
            for (int i = 0; i < sendusernametemp.Length; i++)
            {
                sendusername[i] = sendusernametemp[i];
            }
            sendusername[sendusername.Length - 1] = closebyte[0];
            mysocket.Send(sendusername, 0, sendusername.Length, SocketFlags.None);
            Thread.Sleep(500);
        }
        /// <summary>
        /// 获取数据
        /// </summary>
        /// <returns></returns>
        public string GetData(string cmd)
        {
            try
            {
                mysocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                mysocket.Connect(ipEnd);
                ConnetServer(); //连接服务
                ExcuteCommand(cmd);//执行命令
                byte[] recvdatauser = new byte[8192];
                mysocket.Receive(recvdatauser, 0, mysocket.Available, SocketFlags.None);
                string recvuserstr = Encoding.ASCII.GetString(recvdatauser);
                recvuserstr = recvuserstr.TrimEnd('\0');
                mysocket.Close();
                System.Threading.Thread.Sleep(300);
                //Console.Write("recvuserstr_string：" + recvuserstr);
                recvuserstr = recvuserstr.Substring(cmd.Length, recvuserstr.Length - cmd.Length).TrimStart();//去掉了服务器回显
                recvuserstr = this.login.Equals("root") ? recvuserstr.Replace("#", "").TrimEnd() : recvuserstr.Replace("$", "").TrimEnd();
                return recvuserstr;//.Split('\r')[1].Trim();
            }
            catch (Exception ex)
            {
                LogHelper.WriteTelnetLog(ex.ToString());
                return "EXError："+ex.ToString();
            }
        }
    }
}