C# ADSL重新连接、拨号

using System;
using System.Collections.Generic;
using System.Text;
using System.Timers;
using System.Runtime.InteropServices;
using Microsoft.Win32;

namespace DotNet.Utilities
{
public class Ras
{
// Fields
private bool bConnected;
private ConnectionNotify ConnectNotify;
private const int DNLEN = 15;
private string EntryName;
private const int ERROR_BUFFER_TOO_SMALL = 0x25b;
private int hrasconn;
public const int MAX_PATH = 260;
public Timer NotifyTimer;
private const int PWLEN = 0x100;
private const string Ras_Authenticate = "正在验证用户名与密码.";
public const string Ras_Connected = "成功连接到";
public const string Ras_Connecting = "正在连接";
private const string Ras_DialUping = "正在拨...";
public const string Ras_Disconnected = "连接中断.";
private const string Ras_Dot = "...";
private const int RAS_MaxCallbackNumber = 0x80;
private const int RAS_MaxDeviceName = 0x80;
private const int RAS_MaxDeviceType = 0x10;
public const int RAS_MaxEntryName = 0x100;
private const int RAS_MaxPhoneNumber = 0x80;
private const string Ras_OpenPort = "正在打开端口...";
private const string Ras_PortOpend = "端口已经打开.";
private RASCONN[] Rasconn;
private const int RASCS_DONE = 0x2000;
private const int RASCS_PAUSED = 0x1000;
private const int UNLEN = 0x100;

// Methods
public Ras()
{
}

/// <summary>
///
/// </summary>
/// <param name="ConnectionDelegate">连接通知委托</param>
/// <param name="interval"></param>
public Ras(ConnectionNotify ConnectionDelegate, double interval)
{
this.ConnectNotify = ConnectionDelegate;
this.NotifyTimer = new Timer(interval);
this.NotifyTimer.Elapsed += new ElapsedEventHandler(this.TimerEvent);
this.Rasconn = new RASCONN[1];
this.Rasconn[0].dwSize = Marshal.SizeOf(this.Rasconn[0]);
this.NotifyTimer.Start();
this.bConnected = false;
}

/// <summary>
/// 创建条目
/// </summary>
/// <param name="hWnd">柄</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool CreateEntry(int hWnd, out string strError)
{
int nErrorValue = RasCreatePhonebookEntry(hWnd, null);
if (nErrorValue == 0)
{
strError = null;
return true;
}
strError = this.GetErrorString(nErrorValue);
return false;
}

/// <summary>
/// 删除条目
/// </summary>
/// <param name="strEntryName">条目名称</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool DeleteEntry(string strEntryName, out string strError)
{
int nErrorValue = RasDeleteEntry(null, strEntryName);
if (nErrorValue == 0)
{
strError = null;
return true;
}
strError = this.GetErrorString(nErrorValue);
return false;
}

/// <summary>
/// 拨号
/// </summary>
/// <param name="strEntryName">条目名称</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool DialUp(string strEntryName, out string strError)
{
bool lpfPassword = false;
RASDIALPARAMS structure = new RASDIALPARAMS();
structure.dwSize = Marshal.SizeOf(structure);
structure.szEntryName = strEntryName;
RasDialEvent lpvNotifier = new RasDialEvent(this.RasDialFunc);
int nErrorValue = RasGetEntryDialParams(null, ref structure, ref lpfPassword);
if (nErrorValue != 0)
{
strError = this.GetErrorString(nErrorValue);
return false;
}
this.ConnectNotify("正在连接" + structure.szEntryName + "...", 1);
this.EntryName = strEntryName;
this.hrasconn = 0;
nErrorValue = RasDial(0, null, ref structure, 0, lpvNotifier, ref this.hrasconn);
if (nErrorValue != 0)
{
strError = this.GetErrorString(nErrorValue);
this.ConnectNotify(strError, 3);
return false;
}
this.ConnectNotify("正在打开端口...", 1);
strError = null;
return true;
}

/// <summary>
/// 编辑条目
/// </summary>
/// <param name="hWnd">柄</param>
/// <param name="strEntryName">条目名称</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool EditEntry(int hWnd, string strEntryName, out string strError)
{
int nErrorValue = RasEditPhonebookEntry(hWnd, null, strEntryName);
if (nErrorValue == 0)
{
strError = null;
return true;
}
strError = this.GetErrorString(nErrorValue);
return false;
}
/// <summary>
/// 获取默认条目
/// </summary>
/// <param name="strEntry">条目</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool GetDefaultEntry(out string strEntry, out string strError)
{
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE/Microsoft/RAS AutoDial/Default");
if (key != null)
{
string str = (string)key.GetValue("DefaultInternet");
if ((str != null) && (str.Length > 0))
{
strEntry = str;
strError = null;
return true;
}
}
strEntry = null;
strError = "注册表访问失败.";
return false;
}

/// <summary>
/// 得到条目
/// </summary>
/// <param name="strEntryName">条目名称</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool GetEntries(out string[] strEntryName, out string strError)
{
RASENTRYNAME[] lprasentryname = new RASENTRYNAME[1];
lprasentryname[0].dwSize = Marshal.SizeOf(lprasentryname[0]);
int lpcb = 0;
int lpcEntries = 0;
int nErrorValue = RasEnumEntries(null, null, lprasentryname, ref lpcb, ref lpcEntries);
switch (nErrorValue)
{
case 0:
break;

case 0x25b:
lprasentryname = new RASENTRYNAME[lpcEntries];
lprasentryname[0].dwSize = Marshal.SizeOf(lprasentryname[0]);
break;

default:
strError = this.GetErrorString(nErrorValue);
strEntryName = null;
return false;
}
nErrorValue = RasEnumEntries(null, null, lprasentryname, ref lpcb, ref lpcEntries);
if (nErrorValue != 0)
{
strError = this.GetErrorString(nErrorValue);
strEntryName = null;
return false;
}
strEntryName = new string[lpcEntries];
for (int i = 0; i < lpcEntries; i++)
{
strEntryName[i] = lprasentryname[i].szEntryName;
}
strError = null;
return true;
}

/// <summary>
/// 获得入口参数
/// </summary>
/// <param name="strEntryName">条目名称</param>
/// <param name="strPhoneNumber">电话号码</param>
/// <param name="strUserName">用户名</param>
/// <param name="strPassword">密码</param>
/// <param name="bRememberPassword">记住密码</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool GetEntryParams(string strEntryName, out string strPhoneNumber, out string strUserName, out string strPassword, out bool bRememberPassword, out string strError)
{
bool lpfPassword = false;
RASDIALPARAMS structure = new RASDIALPARAMS();
structure.dwSize = Marshal.SizeOf(structure);
structure.szEntryName = strEntryName;
int nErrorValue = RasGetEntryDialParams(null, ref structure, ref lpfPassword);
if (nErrorValue != 0)
{
strError = this.GetErrorString(nErrorValue);
strPhoneNumber = null;
strUserName = null;
strPassword = null;
bRememberPassword = false;
strError = null;
return false;
}
strPhoneNumber = structure.szPhoneNumber;
strUserName = structure.szUserName;
if (lpfPassword)
{
strPassword = structure.szPassword;
}
else
{
strPassword = null;
}
bRememberPassword = lpfPassword;
strError = null;
return true;
}

/// <summary>
/// 获得错误
/// </summary>
/// <param name="nErrorValue"></param>
/// <returns></returns>
internal string GetErrorString(int nErrorValue)
{
if ((nErrorValue >= 600) && (nErrorValue < 0x2f2))
{
int cBufSize = 0x100;
string lpszErrorString = new string(new char[cBufSize]);
if (RasGetErrorString(nErrorValue, lpszErrorString, cBufSize) != 0)
{
lpszErrorString = null;
}
if ((lpszErrorString != null) && (lpszErrorString.Length > 0))
{
return lpszErrorString;
}
}
return null;
}

/// <summary>
/// 挂断
/// </summary>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool HangUp(out string strError)
{
this.bConnected = false;
if (this.hrasconn != 0)
{
int nErrorValue = RasHangUp(this.hrasconn);
if (nErrorValue != 0)
{
strError = this.GetErrorString(nErrorValue);
this.ConnectNotify(strError, 0);
return false;
}
}
foreach (RASCONN rasconn in this.Rasconn)
{
if (rasconn.hrasconn != 0)
{
int num2 = RasHangUp(rasconn.hrasconn);
if (num2 != 0)
{
strError = this.GetErrorString(num2);
this.ConnectNotify(strError, 0);
return false;
}
}
}
strError = null;
this.ConnectNotify("连接中断.", 0);
return true;
}

[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasCreatePhonebookEntry(int hwnd, string lpszPhonebook);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasDeleteEntry(string lpszPhonebook, string lpszEntry);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasDial(int lpRasDialExtensions, string lpszPhonebook, ref RASDIALPARAMS lpRasDialParams, int dwNotifierType, RasDialEvent lpvNotifier, ref int lphRasConn);
/// <summary>
/// 拨
/// </summary>
/// <param name="unMsg"></param>
/// <param name="rasconnstate"></param>
/// <param name="dwError"></param>
private void RasDialFunc(uint unMsg, RASCONNSTATE rasconnstate, int dwError)
{
if (dwError != 0)
{
this.ConnectNotify(this.GetErrorString(dwError), 3);
this.bConnected = false;
if (this.hrasconn != 0)
{
int nErrorValue = RasHangUp(this.hrasconn);
if (nErrorValue == 0)
{
this.ConnectNotify("连接中断.", 0);
}
else
{
this.ConnectNotify(this.GetErrorString(nErrorValue), 0);
}
}
}
else
{
if (rasconnstate == RASCONNSTATE.RASCS_PortOpened)
{
this.ConnectNotify("端口已经打开.", 1);
}
if (rasconnstate == RASCONNSTATE.RASCS_ConnectDevice)
{
this.ConnectNotify("正在拨...", 1);
}
if (rasconnstate == RASCONNSTATE.RASCS_Authenticate)
{
this.ConnectNotify("正在验证用户名与密码.", 1);
}
if (rasconnstate == RASCONNSTATE.RASCS_Connected)
{
this.bConnected = true;
this.ConnectNotify("成功连接到" + this.EntryName + '.', 2);
}
}
}

[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasEditPhonebookEntry(int hwnd, string lpszPhonebook, string lpszEntryName);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasEnumConnections([In, Out] RASCONN[] lprasconn, ref int lpcb, ref int lpcConnections);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasEnumEntries(string reserved, string lpszPhonebook, [In, Out] RASENTRYNAME[] lprasentryname, ref int lpcb, ref int lpcEntries);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasGetConnectStatus(int hrasconn, ref RASCONNSTATUS lprasconnstatus);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasGetEntryDialParams(string lpszPhonebook, ref RASDIALPARAMS lprasdialparams, ref bool lpfPassword);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasGetErrorString(int uErrorValue, string lpszErrorString, int cBufSize);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasHangUp(int hrasconn);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasRenameEntry(string lpszPhonebook, string lpszOldEntry, string lpszNewEntry);
[DllImport("rasapi32.dll", CharSet = CharSet.Auto)]
private static extern int RasSetEntryDialParams(string lpszPhonebook, ref RASDIALPARAMS lprasdialparams, bool fRemovePassword);
/// <summary>
/// 重命名输入
/// </summary>
/// <param name="strOldEntry">旧的条目</param>
/// <param name="strNewEntry">新的条目</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool RenameEntry(string strOldEntry, string strNewEntry, out string strError)
{
int nErrorValue = RasRenameEntry(null, strOldEntry, strNewEntry);
if (nErrorValue == 0)
{
strError = null;
return true;
}
strError = this.GetErrorString(nErrorValue);
return false;
}

/// <summary>
/// 设置默认条目
/// </summary>
/// <param name="strEntry"></param>
public void SetDefaultEntry(string strEntry)
{
if ((strEntry != null) && (strEntry.Length > 0))
{
RegistryKey key = Registry.LocalMachine.OpenSubKey(@"SOFTWARE/Microsoft/RAS AutoDial/Default", true);
if (key == null)
{
key = Registry.LocalMachine.CreateSubKey(@"SOFTWARE/Microsoft/RAS AutoDial/Default");
}
key.SetValue("DefaultInternet", strEntry);
}
}

/// <summary>
/// 设置输入参数个数
/// </summary>
/// <param name="strEntryName">条目名称</param>
/// <param name="strPhoneNumber">电话号码</param>
/// <param name="strUserName">用户名</param>
/// <param name="strPassword">密码</param>
/// <param name="bRememberPassword">记住密码</param>
/// <param name="strError">错误</param>
/// <returns>结果</returns>
public bool SetEntryParams(string strEntryName, string strPhoneNumber, string strUserName, string strPassword, bool bRememberPassword, out string strError)
{
RASDIALPARAMS structure = new RASDIALPARAMS();
structure.dwSize = Marshal.SizeOf(structure);
structure.szEntryName = strEntryName;
structure.szPhoneNumber = strPhoneNumber;
structure.szUserName = strUserName;
structure.szPassword = strPassword;
int nErrorValue = RasSetEntryDialParams(null, ref structure, !bRememberPassword);
if (nErrorValue != 0)
{
strError = this.GetErrorString(nErrorValue);
return false;
}
strError = null;
return true;
}

/// <summary>
/// 计时器事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void TimerEvent(object sender, ElapsedEventArgs e)
{
RASCONNSTATUS structure = new RASCONNSTATUS();
int lpcb = 0;
int lpcConnections = 0;
structure.dwSize = Marshal.SizeOf(structure);
int nErrorValue = RasEnumConnections(this.Rasconn, ref lpcb, ref lpcConnections);
switch (nErrorValue)
{
case 0:
break;

case 0x25b:
this.Rasconn = new RASCONN[lpcConnections];
lpcb = this.Rasconn[0].dwSize = Marshal.SizeOf(this.Rasconn[0]);
nErrorValue = RasEnumConnections(this.Rasconn, ref lpcb, ref lpcConnections);
break;

default:
this.ConnectNotify(this.GetErrorString(nErrorValue), 3);
return;
}
if (nErrorValue != 0)
{
this.ConnectNotify(this.GetErrorString(nErrorValue), 3);
}
else if ((lpcConnections < 1) && this.bConnected)
{
this.bConnected = false;
this.ConnectNotify("连接中断.", 0);
}
else
{
for (int i = 0; i < lpcConnections; i++)
{
nErrorValue = RasGetConnectStatus(this.Rasconn[i].hrasconn, ref structure);
if (nErrorValue != 0)
{
this.ConnectNotify(this.GetErrorString(nErrorValue), 3);
return;
}
if ((structure.rasconnstate == RASCONNSTATE.RASCS_Connected) && !this.bConnected)
{
this.bConnected = true;
this.ConnectNotify("成功连接到" + this.Rasconn[i].szEntryName + '.', 2);
}
if ((structure.rasconnstate == RASCONNSTATE.RASCS_Disconnected) && this.bConnected)
{
this.bConnected = false;
this.ConnectNotify("连接中断.", 0);
}
}
}
}

/// <summary>
/// 嵌套类型
/// </summary>
/// <param name="strNotify"></param>
/// <param name="bConnect"></param>
public delegate void ConnectionNotify(string strNotify, int bConnect);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct RASCONN
{
internal int dwSize;
internal int hrasconn;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x101)]
internal string szEntryName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x11)]
internal string szDeviceType;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x81)]
internal string szDeviceName;
}

private enum RASCONNSTATE
{
RASCS_AllDevicesConnected = 4,
RASCS_AuthAck = 12,
RASCS_AuthCallback = 8,
RASCS_AuthChangePassword = 9,
RASCS_Authenticate = 5,
RASCS_Authenticated = 14,
RASCS_AuthLinkSpeed = 11,
RASCS_AuthNotify = 6,
RASCS_AuthProject = 10,
RASCS_AuthRetry = 7,
RASCS_CallbackSetByCaller = 0x1002,
RASCS_ConnectDevice = 2,
RASCS_Connected = 0x2000,
RASCS_DeviceConnected = 3,
RASCS_Disconnected = 0x2001,
RASCS_Interactive = 0x1000,
RASCS_OpenPort = 0,
RASCS_PasswordExpired = 0x1003,
RASCS_PortOpened = 1,
RASCS_PrepareForCallback = 15,
RASCS_Projected = 0x12,
RASCS_ReAuthenticate = 13,
RASCS_RetryAuthentication = 0x1001,
RASCS_SubEntryConnected = 0x13,
RASCS_SubEntryDisconnected = 20,
RASCS_WaitForCallback = 0x11,
RASCS_WaitForModemReset = 0x10
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct RASCONNSTATUS
{
internal int dwSize;
internal Ras.RASCONNSTATE rasconnstate;
internal int dwError;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x11)]
internal string szDeviceType;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x81)]
internal string szDeviceName;
}

/// <summary>
/// 拨事件
/// </summary>
/// <param name="unMsg">显示</param>
/// <param name="rasconnstate"></param>
/// <param name="dwError">错误</param>
private delegate void RasDialEvent(uint unMsg, Ras.RASCONNSTATE rasconnstate, int dwError);

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct RASDIALPARAMS
{
internal int dwSize;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x101)]
internal string szEntryName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x81)]
internal string szPhoneNumber;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x81)]
internal string szCallbackNumber;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x101)]
internal string szUserName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x101)]
internal string szPassword;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x10)]
internal string szDomain;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
private struct RASENTRYNAME
{
internal int dwSize;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x101)]
internal string szEntryName;
}
}
}