C# 实现自动拔号

用系统自带的rasdial.exe可以实现
方法是 rasdial.exe 连接名称 用户名 密码
连接名称是你创建的宽带连接名 如"宽带连接"

 System.Diagnostics.Process.Start("rasdial.exe", ADSLname.Text + " " + ADSLuser.Text + " " + ADSLpass.Text); 

断线 rasdial.exe 连接名称 disconnect
  System.Diagnostics.Process.Start("rasdial.exe", ADSLname.Text + " disconnect"); 


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=17)]
    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(
        IntPtr 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 of buffer
        out int lpcEntries             // number of entries written
        //  to buffer
        );

    [DllImport("wininet.dll",CharSet=CharSet.Auto)]
    public extern static int InternetDial(
        IntPtr hwnd,
        [In]string lpszConnectoid, 
        uint dwFlags,
        ref int lpdwConnection,
        uint dwReserved
        );

    public RAS()
    {

    }

        
}
public enum DEL_CACHE_TYPE //要删除的类型。
{
    File,//表示internet临时文件
    Cookie //表示Cookie
};
public class RASDisplay
{
    [DllImport("wininet.dll",CharSet=CharSet.Auto)]
    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 stats = 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) /60) - (Hours * 60);
            Seconds = ((stats.dwConnectionDuration /1000)) - (Minutes * 60) - (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;i0)
        {
            for(int i=0;i