C # Implementation of ADSL automatic disconnection and dialing method (for dial-up users) _c# tutorial

Encapsulate class:

Using System;

Using System.Runtime.InteropServices;
  public struct Rasconn {public int dwsize;
  Public IntPtr Hrasconn;
  [MarshalAs (UnmanagedType.ByValTStr, SizeConst = 257)] public string szentryname;
  [MarshalAs (UnmanagedType.ByValTStr, SizeConst =)] public string szdevicetype;
[MarshalAs (UnmanagedType.ByValTStr, SizeConst = 129)] public string szdevicename;
  [StructLayout (layoutkind.sequential, CharSet = charset.auto)] public struct Rasstats {public int dwsize;
  public int dwbytesxmited;
  public int dwbytesrcved;
  public int dwframesxmited;
  public int dwframesrcved;
  public int dwcrcerr;
  public int dwtimeouterr;
  public int dwalignmenterr;
  public int dwhardwareoverrunerr;
  public int dwframingerr;
  public int dwbufferoverrunerr;
  public int dwcompressionratioin;
  public int dwcompressionratioout;
  public int dwbps;
public int dwconnectionduration;
  [StructLayout (layoutkind.sequential, CharSet = charset.auto)] public struct Rasentryname {public int dwsize; [MarshalAs (unmanagedtype.byvaltstr,sizeconst= (int) Rasfieldsizeconstants.ras_maxentryname + 1)] public string
  Szentryname;
  #if WINVER5//public int dwflags;
  [MarshalAs (UNMANAGEDTYPE.BYVALTSTR,SIZECONST=260+1)]//public string Szphonebookpath;

  #endif} public class RAS {[DllImport ("Rasapi32.dll", EntryPoint = "Rasenumconnectionsa", SetLastError = True)]
    internal static extern int rasenumconnections (ref rasconn Lprasconn,//buffer to receive connections data


  ref int LPCB,//size in bytes of buffer ref int lpcconnections//number of connections written to buffer); [DllImport ("Rasapi32.dll", CharSet = CharSet.Auto)] internal static extern uint Rasgetconnectionstatistics (intpt
  R Hrasconn,//handle to the connection [in, Out]rasstats lpstatistics//buffer to receive statistics); [DllImport ("Rasapi32.dll", CharSet = CharSet.Auto)] public extern static UINT Rashangup (INTPTR hrasconn Handle to the RAS connection to hang up);       [DllImport ("Rasapi32.dll", CharSet = CharSet.Auto)] public extern static UINT Rasenumentries (string reserved,
    Reserved, must be NULL string lpszphonebook,//pointer to full path and//file name of phone-book file [In, out] Rasentryname[] lprasentryname,//buffer to receive//phone-book entries ref int LPCB,//size in bytes O

  F buffer out int lpcentries//number of entries written//to buffer); [DllImport ("Wininet.dll", CharSet = CharSet.Auto)] public extern static int InternetDial (INTPTR hwnd, [In]strin

  G lpszconnectoid, uint dwflags, ref int lpdwconnection, uint dwreserved);
Public RAS () {}} public enum Del_cache_type//type to delete. {file,//represents temporary Internet file cookies//Representations Cookies} public class Rasdisplay {[DllImport ("Wininet.dll", CharSet = charset.a UTO)] public static extern bool Deleteurlcacheentry (Del_cache_type tyPE);
  private string m_duration;
  private string M_connectionname;
  Private string[] m_connectionnames;
  Private double m_tx;
  Private double M_rx;
  private bool m_connected;

  Private INTPTR M_connectedrashandle;
  Rasstats status = new Rasstats ();

    Public Rasdisplay () {m_connected = true;
    RAS Lpras = new Ras ();

    Rasconn lprasconn = new Rasconn ();
    Lprasconn.dwsize = Marshal.SizeOf (typeof (Rasconn));

    Lprasconn.hrasconn = IntPtr.Zero;
    int LPCB = 0;
    int lpcconnections = 0;
    int nret = 0;

    LPCB = Marshal.SizeOf (typeof (Rasconn)); Nret = RAS.

    Rasenumconnections (ref lprasconn, ref LPCB, ref lpcconnections);
      if (nret!= 0) {m_connected = false;

    Return if (Lpcconnections > 0) {//for (int i = 0; i < lpcconnections i++)//{rasstats

      s = new Rasstats ();
      M_connectedrashandle = Lprasconn.hrasconn; Ras.

Rasgetconnectionstatistics (lprasconn.hrasconn, stats);
      M_connectionname = Lprasconn.szentryname;
      int Hours = 0;
      int Minutes = 0;

      int Seconds = 0;
      Hours = ((stats.dwconnectionduration/1000)/3600);
      Minutes = ((stats.dwconnectionduration/1000)/A)-(Hours * 60);


      Seconds = ((stats.dwconnectionduration/1000))-(Minutes *)-(Hours * 3600);
      M_duration = Hours + "Hours" + Minutes + "Minutes" + Seconds + "secs";
      M_tx = stats.dwbytesxmited;
      M_rx = stats.dwbytesrcved;
    } else {m_connected = false;
    int lpnames = 1;
    int entrynamesize = 0;
    int lpsize = 0;

    rasentryname[] names = null;
    Entrynamesize = Marshal.SizeOf (typeof (Rasentryname));

    Lpsize = Lpnames * entrynamesize;
    names = new Rasentryname[lpnames];

    Names[0].dwsize = entrynamesize; UINT retval = RAS.

    Rasenumentries (null, NULL, names, ref lpsize, out lpnames); If we have more than one connection, we need to do it again if (lpnames> 1) {names = new Rasentryname[lpnames]; for (int i = 0; i < names. Length;
      i++) {names[i].dwsize = entrynamesize; } retval = RAS.

    Rasenumentries (null, NULL, names, ref lpsize, out lpnames); } m_connectionnames = new string[names.


    Length]; if (Lpnames > 0) {for (int i = 0; i < names. Length;
      i++) {M_connectionnames[i] = Names[i].szentryname;
    }} public string Duration {get {m_connected? M_duration: "";
    } public string[] Connections {get {return m_connectionnames;
    } public double bytestransmitted {get {return m_connected? m_tx:0;

    } public double bytesreceived {get {return m_connected? m_rx:0;
    } public string ConnectionName {get {m_connected? M_connectionname: ""; } public bool IsConnected {get {REturn m_connected;
    } public int Connect (string Connection) {int temp = 0;
    UINT internet_auto_dial_unattended = 2; int retVal = RAS.
    InternetDial (IntPtr.Zero, Connection, internet_auto_dial_unattended, ref temp, 0);
  return retVal; public void Disconnect () {RAS.
  Rashangup (M_connectedrashandle); }
}

Call Method:

Rasdisplay ras = new Rasdisplay ();
Ras. Disconnect ();//Disconnect
RAS. Connect ("ADSL");/redial

Note: If you do not want the confirmation dialog box to appear when you disconnect, follow the steps below to set it:

1, right click on the "Network Neighborhood"-attributes;

2, in the next "Broadband Connection" window, right-click the broadband connection, click "Properties";

3, in the subsequent Properties dialog box, click Options;

4, the following "prompt name, password and certificate" before the check mark removed, point "OK" exit;

The above C # implementation of ADSL automatic disconnection and dial-up method (applicable to dial-up users) is a small series to share all the content, I hope to give you a reference, but also hope that we support the cloud habitat community.