用c#在XP中自动拔号

我也是在网上看到的,没什么可说的,直接看代码吧:

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 dataref int lpcb, // size in bytes of bufferref 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 NULLstring lpszPhonebook, // pointer to full path and// file name of phone-book file[In,Out]RasEntryName[] lprasentryname, // buffer to receive// phone-book entriesref int lpcb, // size in bytes of bufferout 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, reflpcConnections);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 againif(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 < m_ConnectionNames.Length; ++i ){m_ConnectionNames[i] = names[i].szEntryName;}}}public string Duration{get{return 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{return 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);}}

使用方法:

RASDisplay ras = new RASDisplay();
ras.Disconnect();
int val = ras.Connect( "ADSL" );

"ADSL"名称不限,val如果返回0，说明已拔号成功