1 /// <summary>
 2 /// 断开网络连接
 3 /// </summary>
 4 public static void Logout()
 5         {
 6             ReadOnlyCollection<RasConnection> conList = RasConnection.GetActiveConnections();
 7             foreach (RasConnection con in conList)
 8             {
 9                 con.HangUp();
10             }
11         }

 1 /// <summary>
 2 /// 开始拨号
 3 /// </summary>
 4 /// <returns>返回拨号进程的返回值</returns>
 5         public static int Connect()
 6         {
 7             //联网参数
 8             string intername = Common.DESEncrypt.DesDecrypt(Common.MethodClass.GetConfigValue("intername").ToString());
 9             string interpwd = Common.DESEncrypt.DesDecrypt(Common.MethodClass.GetConfigValue("interpwd").ToString());
10 
11             ProcessWindowStyle _windowstyle = ProcessWindowStyle.Hidden;
12             Process pro = new Process();
13             pro.StartInfo.FileName = "rasdial.exe";
14 
15 //intername宽带用户名，interpwd宽度密码
16             pro.StartInfo.Arguments = "宽带连接" + " " + intername + " " + interpwd;
17             pro.StartInfo.WindowStyle = _windowstyle;
18             pro.Start();
19             pro.WaitForExit();
20             return pro.ExitCode;
21         }

 1  public void buttonItem2_Click(object sender, EventArgs e)
 2         {
 3             Logout();
 4             if (Connect() == 0)
 5             {
 6                 //拨号成功
 7             }
 8             else
 9             {
10                 //拨号失败
11             }
12         }