c# 进行vpn连接

Question

问下大家，谁知道c＃ 如何进行vpn连接，调用那些dll文件和哪些函数，有没有例子，我想自己做一个界面进行vpn拨号和断开。谢谢大家

Answer 1

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;
using DotRas;
using System.Net;namespace UpLoadTest
{    public class VPN
    {
        private static string WinDir = Environment.GetFolderPath(Environment.SpecialFolder.System);
        private static string fileName = @"\rasdial.exe";//@"\rasphone.exe ";
        private static string VPNPROCESS = WinDir + fileName;       //private string _VPNConnectionName = "";        private string _IPToPing = "";        private bool _isConnected = false;        public bool IsConnected
        {
            get { return _isConnected; }
        }        public string IPToPing
        {
            get { return System.Configuration.ConfigurationSettings.AppSettings["serverIp"].ToString(); }
        }        public string VPNConnectionName
        {
            get { return System.Configuration.ConfigurationSettings.AppSettings["vpnName"].ToString(); }     
        }        public string UserName
        {
            get { return System.Configuration.ConfigurationSettings.AppSettings["userName"].ToString(); }
        }        public string Password
        {
            get
            {
                return System.Configuration.ConfigurationSettings.AppSettings["password"].ToString();
            }
        }        public static bool TestConnection()
        {
            VPN vpn = new VPN();//为了以后更多属性，其实现在完全可以不要
            bool RV = false;
            try
            {
                System.Net.NetworkInformation.Ping ping = new System.Net.NetworkInformation.Ping();                if (ping.Send(vpn.IPToPing).Status == System.Net.NetworkInformation.IPStatus.Success)
                {
                    RV = true;
                }
                else
                {
                    RV = false;
                }
                ping = null;
            }
            catch (Exception Ex)
            {
                Debug.Assert(false, Ex.ToString());
                RV = false;
            }
            return RV;
        }        public static bool ConnectToVPN()
        {
            VPN vpn = new VPN();
            bool RV = false;
            try
            {
                               string args = string.Format("{0} {1} {2}",vpn.VPNConnectionName,vpn.UserName,vpn.Password);
                ProcessStartInfo myProcess = new ProcessStartInfo(VPNPROCESS,args);                //System.Security.SecureString secretString = new System.Security.SecureString();
                //foreach (char c in vpn.Password)
                //    secretString.AppendChar(c);
                //myProcess.Arguments = vpn.VPNConnectionName;
                //myProcess.UserName = vpn.UserName;                //myProcess.Password = secretString;                //myProcess.Domain = "@ADServer.Local";
                myProcess.CreateNoWindow = true;                myProcess.UseShellExecute = false;            
                
                //Process.Start(VPNPROCESS, );
              
                //Process.Start(VPNPROCESS, " -d " + vpn.VPNConnectionName);
                Process.Start(myProcess);
                //System.Windows.Forms.Application.DoEvents();
                //System.Threading.Thread.Sleep(2000);
               // System.Windows.Forms.Application.DoEvents();
                RV = true;            }
            catch (Exception Ex)
            {
                Debug.Assert(false, Ex.ToString());
                RV = false;
            }
            return RV;
        }        public static bool DisconnectFromVPN()
        {            VPN vpn = new VPN();
            bool RV = false;
            try
            {
                //System.Diagnostics.Process.Start(VPNPROCESS, " -h " + vpn.VPNConnectionName);
                //System.Diagnostics.Process.Start(VPNPROCESS, string.Format(@"{0} /d",vpn.VPNConnectionName));
                string args = string.Format(@"{0} /d", vpn.VPNConnectionName);
                ProcessStartInfo myProcess = new ProcessStartInfo(VPNPROCESS, args);
                myProcess.CreateNoWindow = true;
                myProcess.UseShellExecute = false; 
                System.Diagnostics.Process.Start(myProcess);                //System.Windows.Forms.Application.DoEvents();
                //System.Threading.Thread.Sleep(2000);
                //System.Windows.Forms.Application.DoEvents();
                RV = true;
            }
            catch (Exception Ex)
            {
                Debug.Assert(false, Ex.ToString());
                RV = false;
            }
            return RV;
        }        public static void CreateVPN()
        {
            VPN vpn = new VPN();
            DotRas.RasDialer dialer = new DotRas.RasDialer();
            DotRas.RasPhoneBook allUsersPhoneBook = new DotRas.RasPhoneBook();
            allUsersPhoneBook.Open();
            if (allUsersPhoneBook.Entries.Contains(vpn.VPNConnectionName))
            {
                return;
            }
            RasEntry entry = RasEntry.CreateVpnEntry(vpn.VPNConnectionName, vpn.IPToPing, RasVpnStrategy.PptpFirst, RasDevice.GetDeviceByName("(PPTP)", RasDeviceType.Vpn));            allUsersPhoneBook.Entries.Add(entry);
            dialer.EntryName = vpn.VPNConnectionName;
            dialer.PhoneBookPath = RasPhoneBook.GetPhoneBookPath(RasPhoneBookType.AllUsers);
            try
            {
                dialer.DialAsync(new NetworkCredential(vpn.UserName, vpn.Password));
            }
            catch (Exception)
            {
                return; 
            }
        }
        public VPN()
        {
        }
    }
}
 

Answer 2

下面是一篇参考文章：VPN连接,调用,断开
http://blog.csdn.net/emailqjc/archive/2009/10/14/4670094.aspx

Answer 3

一楼和二楼的方法我试了，这样的方法只是会在本机的网络连接里面创建一个虚拟专用连接，我想的是不用系统带的这个界面连接，我有自己的界面，我只是调用系统的一些api进行连接，一楼二楼的方法好像系统创建连接了后再连接就连不上了，三楼的文章我看了，呵呵，好像不是c＃ 的没看太明白，但是还要谢谢你们。

Answer 4

有没遇到拨VPN 拨多了就会卡在正在连接状态，想删除和断开都不行？