The simplest method is to use the rasdial command.
Rasdial is a Windows Command that is easy to use. In practice, you can save the following code as a batch file and then run it directly or call it in a program.Rasdial.exe/disconnect
Del "C: \ Documents ents and Settings \ hyuqin \ cookies \ *. *"/Q' clear cookie
Rasdial.exe connection name connection account connection password 'redialing C # code Using system;
Using system. Collections. Generic;
Using system. componentmodel;
Using system. Data;
Using system. drawing;
Using system. text;
Using system. Windows. forms;
Using system. net;
Using system. IO;
Using system. Text. regularexpressions;
Using system. diagnostics;
Using system. Threading;
Using system. runtime;
Using system. runtime. interopservices; Namespace refreship
{
Public partial class dailer: Form
{
Public dailer ()
{
Initializecomponent ();
}
Private Static mutex = new mutex ();
Private process dailer = new process ();
Private void form1_load (Object sender, eventargs E)
{
This. Visible = true;
}
# Region Functions
Int DESC;
// Creating the extern function...
[Dllimport ("wininet. dll")]
Private extern static bool internetgetconnectedstate (Out int description, int reservedvalue );
// Creating a function that uses the API function...
// If out parameter returns 18 then fail, if 81 then success
Public void isconnectedtointernet ()
{
Internetgetconnectedstate (Out DESC, 0 );
} Private void stopdailer ()
{
// Process dailer = new process ();
// Dailer. startinfo. filename = "close. Bat ";
// Dailer. Start ();
// Dailer. Close ();
While (DESC = 81)
{
Lock (dailer)
{
If (! Isalive ("rundll32 "))
{
Mutex. waitone ();
Dailer. startinfo. filename = "rundll32.exe ";
Dailer. startinfo. Arguments = "iedkcs32.dll closerasconnections ";
Dailer. Start ();
// Thread. Sleep (1000 );
Mutex. releasemutex ();
}
// Dailer. waitforexit (1000 );
// Dailer. Close ();
}
Isconnectedtointernet ();
}
Dailer. Close ();
} Private void startdailer ()
{
// Process dailer = new process ();
// Dailer. startinfo. filename = "Connect. Bat ";
// Dailer. Start ();
// Dailer. Close ();
While (DESC! = 81)
{
Lock (dailer)
{
If (! Isalive ("rasdial "))
{
Mutex. waitone ();
Dailer. startinfo. filename = "rasdial.exe ";
Dailer. startinfo. Arguments = txtdail. Text. Trim () + "" + txtname. Text. Trim () + "" + txtpwd. Text. Trim ();
Dailer. Start ();
Mutex. releasemutex ();
}
// Dailer. waitforexit (1000 );
// Dailer. Close ();
// Thread. Sleep (1000 );
}
Isconnectedtointernet ();
}
Dailer. Close ();
} Private bool isalive (string name)
{
Process [] PS = process. getprocessesbyname (name );
If (PS. length> 0)
{
Return true;
}
Else
{
Return false;
}
}
Private bool validateinput ()
{
If (string. isnullorempty (txtdail. Text. Trim ()))
{
MessageBox. Show ("Enter the bandwidth dialing name! ");
Return false;
}
If (string. isnullorempty (txtname. Text. Trim ()))
{
MessageBox. Show ("Enter the bandwidth dialing user name! ");
Return false;
}
If (string. isnullorempty (txtpwd. Text. Trim ()))
{
MessageBox. Show ("Enter the bandwidth dialing password! ");
Return false;
}
Return true;
}
# Endregion
Private void btnstart_click (Object sender, eventargs E)
{
If (validateinput ())
{
This. Visible = false;
This. policyicon1.icon = new icon ("open. ICO ");
Isconnectedtointernet ();
This. startdailer ();
}
} Private void exit toolstripmenuitem_click (Object sender, eventargs E)
{
Application. Exit ();
} Private void button2_click (Object sender, eventargs E)
{
Isconnectedtointernet ();
Stopdailer ();
This. policyicon1.icon = new icon ("close. ICO ");
MessageBox. Show ("the program has been suspended! ");
} Private void btnmini_click (Object sender, eventargs E)
{
This. Visible = false;
} Private void set toolstripmenuitem_click (Object sender, eventargs E)
{
This. Visible = true;
} Private void policyicon#doubleclick (Object sender, eventargs E)
{
This. Visible =! This. visible;
} Private void btnok_click (Object sender, eventargs E)
{
If (validateinput ())
{
This. Visible = false;
This. policyicon1.icon = new icon ("open. ICO ");
Isconnectedtointernet ();
This. startdailer ();
}
}
} |
