SourceAddress:http://whx.tzgt.gov.cn/newshow/newBodyShow.aspx?articleID=879
RASDisplay ras = new RASDisplay();
ras.Disconnect();//断线
ras.Connect("adsl");//拨号
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, ref
lpcConnections);
if(nRet != 0)
{
m_connected = false;
return;
}
if(lpcConnections > 0)
{
//for (int i = 0; i < stats =" new" m_connectedrashandle =" lprasConn.hrasconn;" m_connectionname =" lprasConn.szEntryName;" hours =" 0;" minutes =" 0;" seconds =" 0;" hours =" ((stats.dwConnectionDuration" minutes =" ((stats.dwConnectionDuration" seconds =" ((stats.dwConnectionDuration" m_duration =" Hours" m_tx =" stats.dwBytesXmited;" m_rx =" stats.dwBytesRcved;" m_connected =" false;" lpnames =" 1;" entrynamesize =" 0;" lpsize =" 0;" names =" null;" entrynamesize="Marshal.SizeOf(typeof(RasEntryName));" lpsize="lpNames*entryNameSize;" names="new" dwsize="entryNameSize;" retval =" RAS.RasEnumEntries(null,null,names,ref"> 1)
{
names=new RasEntryName[lpNames];
for(int i=0;i
{
for(int i=0;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);
}
}
