前言

由於工作原因，需要使電腦長時間保持寬頻連線狀態，並且有動態撥號更換ip的需求，在網上查閱資料許久，首先找到了這篇部落格:
使用C#實現ADSL自動撥號

但是本人在win8 64位的系統上並未成功，後來採用bat去實現這個功能並封裝成幫助類

類程式碼

類程式碼如下

//---------------------------------------名稱:基於bat批處理的ADSL動態撥號幫助類
//---------------------------------------更新時間:2017/10/18
//---------------------------------------作者:獻醜
 

//---------------------------------------CSDN地址:http://blog.csdn.net/qq_26712977

using System;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Text;

namespace HttpToolsLib
{
    /// <summary>
    /// ADSL撥號幫助類 用批處理實現
    /// </summary>
    public class ADSLIP
    {
        #region
 
 變數
        /// <summary>
        ///生成的臨時批處理檔名稱
        /// </summary>
        static String _temppath = "temp.bat";
        public static String temppath
        {
            get { return ADSLIP._temppath; }
            set { ADSLIP._temppath = value; }
        }
        /// <summary>
        ///
 
 字串拼接用
        /// </summary>
        private static StringBuilder sb = new StringBuilder();
        /// <summary>
        /// 撥號等待 預設15秒
        /// </summary>
        public static int delay = 15;
        #endregion

        #region 方法
        /// <summary>
        /// 開始撥號
        /// </summary>
        /// <param name="ADSL_Name">寬頻連線名稱</param>
        /// <param name="ADSL_UserName">寬頻連線使用者名稱</param>
        /// <param name="ADSL_PassWord">寬頻連線密碼</param>
        public static void ChangeIp(String ADSL_Name = "寬頻連線", String ADSL_UserName = "", String ADSL_PassWord = "")
        {
            sb.Clear();
            sb.AppendLine("@echo off");
            sb.AppendLine("set adslmingzi=" + ADSL_Name);
            sb.AppendLine("set adslzhanghao=" + ADSL_UserName);
            sb.AppendLine("set adslmima=" + ADSL_PassWord);
            sb.AppendLine("@Rasdial %adslmingzi% /disconnect");
            sb.AppendLine("ping 127.0.0.1 -n 2");
            sb.AppendLine("Rasdial %adslmingzi% %adslzhanghao% %adslmima%");
            sb.AppendLine("echo 連線中");
            sb.AppendLine("ping 127.0.0.1 -n 2");
            sb.AppendLine("ipconfig");
            // sb.AppendLine("pause");

            using (StreamWriter sw = new StreamWriter(temppath, false, Encoding.Default))
            {
                sw.Write(sb.ToString());
            }
            Process.Start(temppath);
            System.Threading.Thread.Sleep(delay * 1000);
            while (!HttpMethod.CheckIp(null))
            {
                Process.Start(temppath);
                System.Threading.Thread.Sleep(2 * delay * 1000);
            }
            File.Delete(temppath);
        }
        /// <summary>
        /// 獲得本地ip
        /// </summary>
        /// <returns></returns>
        public static String GetIP()
        {
            ///獲取本地的IP地址
            string AddressIP = string.Empty;
            //遍歷
            foreach (IPAddress _IPAddress in Dns.GetHostEntry(Dns.GetHostName()).AddressList)
            {
                if (_IPAddress.AddressFamily.ToString() == "InterNetwork")
                {
                    AddressIP = _IPAddress.ToString();
                }
            }
            return AddressIP;
        }
        #endregion
    }
}

幫助類說明

呼叫方式如下

ADSLIP.ChangeIp("寬頻名稱","寬頻使用者名稱","寬頻密碼");

此方式會出現控制檯介面(由於執行bat),但是會自行關閉

使用DotRas進行寬頻撥號

網上找的幫助類—-

    /// <summary>
    /// ADSL撥號幫助類 用DotRas實現
    /// </summary>

    public class RASDisplay
    {
        public static string ADSLName { get;  set; }
        public static string ADSLUserName { get;  set; }
        public static string ADSLPassWord { get;  set; }

        /// <summary>
        /// 建立或更新一個PPPOE連線(指定PPPOE名稱)
        /// </summary>
        static void CreateOrUpdatePPPOE(string updatePPPOEname)
        {
            RasDialer dialer = new RasDialer();
            RasPhoneBook allUsersPhoneBook = new RasPhoneBook();
            string path = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers);
            allUsersPhoneBook.Open(path);
            // 如果已經該名稱的PPPOE已經存在，則更新這個PPPOE伺服器地址
            if (allUsersPhoneBook.Entries.Contains(updatePPPOEname))
            {
                allUsersPhoneBook.Entries[updatePPPOEname].PhoneNumber = " ";
                // 不管當前PPPOE是否連線，伺服器地址的更新總能成功，如果正在連線，則需要PPPOE重啟後才能起作用
                allUsersPhoneBook.Entries[updatePPPOEname].Update();
            }
            // 建立一個新PPPOE
            else
            {
                string adds = string.Empty;
                ReadOnlyCollection<RasDevice> readOnlyCollection = RasDevice.GetDevices();
                RasDevice device = RasDevice.GetDevices().Where(o => o.DeviceType == RasDeviceType.PPPoE).First();
                RasEntry entry = RasEntry.CreateBroadbandEntry(updatePPPOEname, device);    //建立寬頻連線Entry
                entry.PhoneNumber = " ";
                allUsersPhoneBook.Entries.Add(entry);
            }
        }

        /// <summary>
        /// 斷開 寬頻連線
        /// </summary>
        public static void Disconnect()
        {
            ReadOnlyCollection<RasConnection> conList = RasConnection.GetActiveConnections();
            foreach (RasConnection con in conList)
            {
                con.HangUp();
            }
        }

        /// <summary>
        /// 寬頻連線，成功返回true,失敗返回 false
        /// </summary>
        /// <param name="PPPOEname">寬頻連線名稱</param>
        /// <param name="username">寬頻賬號</param>
        /// <param name="password">寬頻密碼</param>
        /// <returns></returns>
        public static bool Connect(string PPPOEname, string username, string password, ref string msg,int delay = 10000)
        {
            try
            {
                CreateOrUpdatePPPOE(PPPOEname);
                using (RasDialer dialer = new RasDialer())
                {
                    dialer.EntryName = PPPOEname;
                    dialer.AllowUseStoredCredentials = true;
                    dialer.Timeout = 1000;
                    dialer.PhoneBookPath = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers);
                    dialer.Credentials = new NetworkCredential(username, password);
                    dialer.Dial();
                    return true;
                }
            }
            catch (RasException re)
            {
                msg = re.ErrorCode + " " + re.Message;
                return false;
            }
            finally
            {
                Thread.Sleep(delay);
            }
        }
        /// <summary>
        /// 連線
        /// </summary>
        /// <returns></returns>
        public static bool Connect()
        {
            try
            {
                CreateOrUpdatePPPOE(ADSLName);
                using (RasDialer dialer = new RasDialer())
                {
                    dialer.EntryName = ADSLName;
                    dialer.AllowUseStoredCredentials = true;
                    dialer.Timeout = 1000;
                    dialer.PhoneBookPath = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers);
                    dialer.Credentials = new NetworkCredential(ADSLUserName, ADSLPassWord);
                    dialer.Dial();
                    return true;
                }
            }
            catch (RasException re)
            {
                Console.WriteLine(re.Message);
                return false;
            }
        }
    }