利用DotRas实现ADSL断线并自动拨号

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C#自动换IP,很多都是要弹拨号窗口的,利用dotras可以实现不弹窗

using DotRas;       

private bool changeip()
        {
            try
            {
                string mypbk = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers).ToString();
                RasConnection myconn = RasConnection.GetActiveConnectionByName("adsl", mypbk);
                myconn.HangUp();
                RasDialer dialer = new RasDialer();
                dialer.DialCompleted += new EventHandler<DialCompletedEventArgs>(dialer_DialCompleted);
                dialer.EntryName = "adsl";
                dialer.PhoneNumber = "";
                dialer.AllowUseStoredCredentials = true;
                dialer.PhoneBookPath = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers);
                dialer.Timeout = 5000;
                rasdone = false;
                RasHandle myras= dialer.Dial();
                while(myras.IsInvalid)
                {
                    Thread.Sleep(1000);
                    myras = dialer.Dial();
                }
                return true;
            }
            catch (Exception ex)
            {
                writeerr("[changeip]"+ex.Message);
                return false;
            }
        }

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