adsl 自动拨号类 源码

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("Ra<a href="http://dev.21tx.com/corp/sap/" target="_blank">SAP</a>i32.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 );******* string m_duration;******* string m_ConnectionName;******* string[] m_ConnectionNames;******* double m_TX;******* double m_RX;******* bool m_connected;******* 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;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 { 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);}}