c# 拨号换IP 例子

using System;using System.Collections.Generic;using System.Linq;using System.Runtime.InteropServices;using System.Text;using Microsoft.Win32;namespace AdslChangeIP{ public class RasApi { [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; } /// <summary> /// 列出所有的远程访问的名字 /// </summary> /// <param name="reserved">保留，必须为NULL</param> /// <param name="lpszPhonebook">电话本文件的完整路径和名字</param> /// <param name="lprasentryname">指向一个缓冲，该缓冲接收一个RASENTRYNAME结构的数组。在调用函数之前，一个应用程序必须设置上述结构中的dwSize参数用以指定所要传递结构的版本。</param> /// <param name="lpcb">指向一个变量，该变量包含由lprasentryname参数指定的缓冲的大小（单位为字节）。作为返回，函数设置该变量为成功调用所要求的字节数。</param> /// <param name="lpcEntries">指向一个变量，该变量在函数成功是，设置为由lprasentryname参数指定的电话本的号码。</param> /// <returns>返回零值，失败返回非零值。</returns> [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)] public extern static uint RasEnumEntries( string reserved, // 保留, 必须空 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 ); /// <summary> /// 通过对RasDial的成功调用，本函数调用后返回连接信息被保存为电话簿入口。 /// </summary> /// <param name="lpszPhonebook">Windows CE:本参数被忽视，或者设置为NULL，通过电话簿存储进行拨号上网注册，而不是通过电话簿文件。</param> /// <param name="lprasdialparams">一个指向RASDIALPARAMS结构的指针，在输入时，dwSize成员必须被 RASDIALPARAMS结构指定大小。并且szEntryName 成员必须被指定一个有效地电话簿入口，输出时结构接收一个已经被指定电话簿入口相关联的连接参数。 注意：szPhoneNumber 成员不能接到与电话簿入口相关联的电话号码，要想获得的电话号码需要调用 RasGetEntryProperties 函数</param> /// <param name="lpfPassword">一个BOOL类型指针，表示函数是否能通过电话簿入口返回和用户名相关联的密码，函数设置该标志位为TRUE时，用户的密码返回到lpRasDialParams 参数指向的RASDIALPARAMS 结构的szPassword 成员中</param> /// <returns>　0表示成功。ERROR_BUFFER_INVALID 表示lpRasDialParams 或者 lpfPassword 指针是无效的。或者lpRasDialParams 得缓冲区是无效的。ERROR_CANNOT_OPEN_PHONEBOOK 表示电话簿被损坏或者丢失组件。ERROR_CANNOT_FIND_PHONEBOOK_ENTRY 表示电话簿的入口不存在。</returns> [DllImport("rasapi32.dll", CharSet = CharSet.Auto)] private static extern int RasGetEntryDialParams(string lpszPhonebook, ref Rasdialparams lprasdialparams, ref bool lpfPassword); /// <summary> /// 本函数建立RAS 客户端和服务器端的一个连接。这个连接包括和返回用户验证信息。 /// </summary> /// <param name="lpRasDialExtensions">本参数可以被忽略并且可以设置为NULL,在Windows CE,RasDial 总是使用RASDIALEXTENSIONS 当做默认选项。</param> /// <param name="lpszPhonebook">本参数可以被忽略并且可以设置为NULL，通过电话簿存储进行拨号上网注册，而不是通过电话簿文件。</param> /// <param name="lpRasDialParams">一个指向RASDIALPARAMS 结构的指针，用来描述 RAS连接的调用参数。调用者必须设置RASDIALPARAMS 结构的 dwSize成员(即结构大小)，用sizeof(RASDIALPARAMS)取得大小，防止不同版本的系统取得的大小不同</param> /// <param name="dwNotifierType">描述通告程序的参数性质。如果通告程序为NULL,本参数可以忽略，如果非空，则设置本参数为下面值：0xFFFFFFFF 通过程序是一个句柄，是窗体接收通告程序消息用的。在通告程序进行中，wParam参数指示 RAS连接将要进入的连接状态。当发生错误时lParam里存储错误信息。通告程序处理时，使用的消息是：WM_RASDIALEVENT。</param> /// <param name="lpvNotifier">一个指针，指向窗体句柄，用来接收RasDial的通告事件。如果本参数非空，RasDial为每一个通告事件发送一个windows消息。RasDial调用异步操作:在建立连接之前RasDial立即返回，使用窗体进行进程通信。如果本参数被设置为：NULL,RasDial 调用同步操作：RasDial不立即返回，直到连接成功或者连接失败。如果本参数非空,在调用RasDial之后，窗体通知会在任何时候出现。当下列事件发生时通知结束：连接被建立，换句话说，RAS的连接状态是RASCS_Connected 连接失败，换句话说，dwError 非零</param> /// <param name="lphRasConn">一个HRASCONN类型的指针，必须设置HRASCONN 类型变量为空在调用RasDial前。如果RasDial成功，本函数存储一个RAS连接句柄在本参数中。</param> /// <returns>0表示成功</returns> [DllImport("rasapi32.dll", CharSet = CharSet.Auto)] private static extern int RasDial(int lpRasDialExtensions, string lpszPhonebook, ref Rasdialparams lpRasDialParams, int dwNotifierType, IntPtr lpvNotifier, ref int lphRasConn); /// <summary> /// 远程存取终结函数 /// </summary> /// <param name="hrasconn">被终结的远程存取连接的句柄.当RasDial 或者 RasEnumConnections 执行以后得到该句柄</param> /// <returns>0表示成功</returns> [DllImport("rasapi32.dll", CharSet = CharSet.Auto)] private static extern int RasHangUp(int hrasconn); [DllImport("rasapi32.dll", CharSet = CharSet.Auto)] private extern static uint RasGetProjectionInfo( int hrasconn, // handle to a RAS connection RASPROJECTION rasprojection, // type of control protocol [In, Out] RASPPPIP lpprojection, // pointer to a structure that ref uint lpcb // size of projection structure ); /// <summary> /// 列出所有活动RAS连接，返回每一个连接句柄和电话簿入口名 /// </summary> /// <param name="lprasconn">返回一个RASCONN结构数组的缓存的长指针，对于每一个RAS连接。在调用本函数之前，必须设置缓存中RASCONN结构的第一个成员dwSize的值，即RASCONN的大小，为了在不同系统版本中通过，请用sizeof(RASCONN)取得大小</param> /// <param name="lpcb">一个长指针，指向的变量是lprasconn指向的缓存中存储的字节个数，返回时，本函数将已经被列举的所有RAS连接需要的字节个数赋值到lpcb中</param> /// <param name="lpcConnections">长指针，本函数设置会回写这个参数，设置有多少个 RASCONN结构被写入到 lprasconn指向的缓存中</param> /// <returns>返回0则成功 返回非0值则错误，返回值的宏定义在 Raserror头文件中，例如ERROR_BUFFER_TOO_SMALL (缓存太小) ERROR_NOT_ENOUGH_MEMORY (内存不足)</returns> [DllImport("rasapi32.dll", CharSet = CharSet.Auto)] private static extern int RasEnumConnections([In, Out] RASCONN[] lprasconn, ref int lpcb, ref int lpcConnections); private delegate void RasDialEvent(uint unMsg, RASCONNSTATE rasconnstate, int dwError); 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 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; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] private struct RASCONNSTATUS { internal int dwSize; internal RASCONNSTATE rasconnstate; internal int dwError; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x11)] internal string szDeviceType; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x81)] internal string szDeviceName; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] private struct RASENTRYNAME { internal int dwSize; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x101)] internal string szEntryName; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public struct RasEntryName //定义接口名称 { public int dwSize; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 256 1)] public string szEntryName;#if WINVER5 public int dwFlags; [MarshalAs(UnmanagedType.ByValTStr,SizeConst=260 1)] public string szPhonebookPath;#endif } /// <summary> /// RASPROJECTION /// </summary> private enum RASPROJECTION : int { RASP_Amb = 0x10000, RASP_PppNbf = 0x803F, RASP_PppIpx = 0x802B, RASP_PppIp = 0x8021, RASP_PppCcp = 0x80FD, RASP_PppLcp = 0xC021, RASP_Slip = 0x20000 } /// <summary> /// RASPPPIP /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] public class RASPPPIP { public readonly int dwSize = Marshal.SizeOf(typeof(RASPPPIP)); public uint dwError = 0; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = (int)16)] public string szIpAddress = null; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = (int)16)] public string szServerIpAddress = null; } public bool HangUp(string strEntryName, out string strError) { strError = ""; RASCONN[] Rasconn = new RASCONN[1]; Rasconn[0].dwSize = Marshal.SizeOf(Rasconn[0]); RASCONNSTATUS structure = new RASCONNSTATUS(); int lpcb = 0; int lpcConnections = 0; structure.dwSize = Marshal.SizeOf(structure); lpcb = 0x500; int nErrorValue = RasEnumConnections(Rasconn, ref lpcb, ref lpcConnections); switch (nErrorValue) { case 0: break; case 0x25b: Rasconn = new RASCONN[lpcConnections]; lpcb = Rasconn[0].dwSize = Marshal.SizeOf(Rasconn[0]); nErrorValue = RasEnumConnections(Rasconn, ref lpcb, ref lpcConnections); break; //default: //ConnectNotify(this.GetErrorString(nErrorValue), 3); //return; } foreach (RASCONN rasconn in Rasconn.Where(rasconn => rasconn.szEntryName == strEntryName)) { if (rasconn.hrasconn != 0) { int num2 = RasHangUp(rasconn.hrasconn); if (num2 != 0) { //strError = this.GetErrorString(num2); //this.ConnectNotify(strError, 0); return false; } } } strError = null; return true; } public bool DialUp(string strEntryName, string szUserName, string szPassWord, out string strError) { bool lpfPassword = false; strError = null; Rasdialparams structure = new Rasdialparams(); structure.dwSize = Marshal.SizeOf(structure); structure.szEntryName = strEntryName; int nErrorValue = RasGetEntryDialParams(null, ref structure, ref lpfPassword); structure.szUserName = szUserName; structure.szPassword = szPassWord; if (nErrorValue != 0) { strError = "宽带重拨发生错误！"; return false; } int lphrsaConn = 0; nErrorValue = RasDial(0, null, ref structure, 0, IntPtr.Zero, ref lphrsaConn); if (nErrorValue != 0) { strError = "宽带重拨返回" nErrorValue.ToString() "错误!"; //this.ConnectNotify(strError, 3); return false; } strError = "宽带重拨成功！"; strError = GetIP(lphrsaConn); if (strError == "") { strError = "查询IP发生未知错误!"; return false; } return true; } public string GetIP(int lphrsaConn) { RASPPPIP structProjection = new RASPPPIP(); uint uiProjSize = (uint)structProjection.dwSize; try { uint errorCode = RasGetProjectionInfo(lphrsaConn, RASPROJECTION.RASP_PppIp, structProjection, ref uiProjSize); return structProjection.szIpAddress; } catch { return ""; } } public string GetIP(string strEntryName) { RASCONN[] Rasconn = new RASCONN[1]; Rasconn[0].dwSize = Marshal.SizeOf(Rasconn[0]); RASCONNSTATUS structure = new RASCONNSTATUS(); int lpcb = 0; int lpcConnections = 0; structure.dwSize = Marshal.SizeOf(structure); int nErrorValue = RasEnumConnections(Rasconn, ref lpcb, ref lpcConnections); switch (nErrorValue) { case 0: break; case 0x25b: Rasconn = new RASCONN[lpcConnections]; lpcb = Rasconn[0].dwSize = Marshal.SizeOf(Rasconn[0]); nErrorValue = RasEnumConnections(Rasconn, ref lpcb, ref lpcConnections); break; //default: //ConnectNotify(this.GetErrorString(nErrorValue), 3); //return; } int lphrsaConn = 0; foreach (RASCONN rasconn in Rasconn.Where(rasconn => rasconn.szEntryName == strEntryName)) { if (rasconn.hrasconn != 0) { lphrsaConn = rasconn.hrasconn; } } if (lphrsaConn == 0) { return ""; } RASPPPIP structProjection = new RASPPPIP(); uint uiProjSize = (uint)structProjection.dwSize; try { uint errorCode = RasGetProjectionInfo(lphrsaConn, RASPROJECTION.RASP_PppIp, structProjection, ref uiProjSize); return structProjection.szIpAddress; } catch { return ""; } } public bool RasDialUp(string strEntryName, string szUserName, string szPassWord, int SleepMS, out string strError) { HangUp(strEntryName, out strError); System.Threading.Thread.Sleep(SleepMS); bool fh = DialUp(strEntryName, szUserName, szPassWord, out strError); System.Threading.Thread.Sleep(200); return fh; } public bool GetEntries(out string[] strEntryName, out string strError) { 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> /// 通过API获取宽带连接名称 win7已测试 /// </summary> /// <returns></returns> public static List<string> GetAllAdslName() { var list = new List<string>(); 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 = 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 = RasEnumEntries(null, null, names, ref lpSize, out lpNames); } if (lpNames > 0) { for (int i = 0; i < names.Length; i ) { list.Add(names[i].szEntryName); } } return list; } /// <summary> /// 获取一个宽带连接名称 win7已测试 /// 没有则返回null /// </summary> /// <returns></returns> public static string GetOneAdslName() { List<string> list = GetAllAdslName(); if (list != null) { return list[0]; } return null; } /// <summary> /// 通过注册表获取宽带连接名称 win7已测试 /// </summary> /// <returns></returns> public static string[] GetAllAdslNameByKey() { RegistryKey userKey = Registry.CurrentUser; RegistryKey key = userKey.OpenSubKey(@"RemoteAccess\Profile"); return key.GetSubKeyNames();//获取当前创建的adsl宽带列表 } /// <summary> /// 通过注册表获取宽带连接名称 win7已测试 /// </summary> /// <returns></returns> public static string GetOneAdslNameByKey() { string[] keysList = GetAllAdslNameByKey(); if (keysList != null && keysList.Length > 0) { return keysList[0]; } return null; } }}