封裝類：

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, 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 < 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

?

注意：斷開后連接時，如果不想出現確認對話框，請按下面的步驟進行設置：

1、右擊“網上鄰居”--屬性；
2、在隨后出現的“寬帶連接”窗口中，右擊寬帶連接，單擊“屬性”；
3、在隨后出現的屬性對話框中，單擊“選項”；
4、把隨后出現的“提示名稱、密碼和證書等”前面的對號去掉，點“確定”退出；

轉載于:https://www.cnblogs.com/qigege/p/4740279.html

總結

以上是生活随笔為你收集整理的C# 实现ADSL自动断网和拨号（适用于拨号用户）的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。