轉帖|其它|編輯:郝浩|2010-05-12 11:57:01.000|閱讀 684 次
概述:在網絡編程中,有時候會需要重新撥號建立網絡連接(如Ad點擊軟件通過重新撥號形成有效點擊) ,下面介紹兩種軟件開發中兩種實現ADSL自動撥號的方法。
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在網絡編程中,有時候會需要重新撥號建立網絡連接(如Ad點擊軟件通過重新撥號形成有效點擊) ,下面介紹兩種程序中撥號的方法.
1、最簡單的方法:使用RasDial命令
RasDial是Windows自帶的命令,使用非常簡單。實際使用是可將下面代碼保存為一個批處理文件,然后直接運行或在程序里進行調用。
rasdial.exe /disconnect '斷開連接 del "C:\Documents and Settings\hyuqin\Cookies\*.*" /Q '清除Cookie rasdial.exe 連接名 連接賬戶 連接密碼 '重新撥號 |
2、封裝為類,靈活調用
上面提到的方法雖然很簡單,但并非標準的實現方法,使用時會受到一些限制,此時最好的辦法就是將實現代碼封裝為類庫。下面這個類庫是網上一位朋友提供的,直接調用就行.
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 //要刪除的類型。 { File,//表示internet臨時文件 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; 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); } } |
調用方法:
RASDisplay ras = new RASDisplay(); ras.Disconnect();//斷開連接 ras.Connect("ADSL");//重新撥號 |
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