C#实现ADSL自动拨号-adsl自动拨号软件

C# ADSL自动拨号，前提是在系统中已经有了一个宽带拨号连接
C# ADSL自动拨号调用代码:
RASDisplayras=newRASDisplay();  
ras.Disconnect();//断线  
ras.Connect("adsl");//拨号  
 
 
usingSystem;  
usingSystem.Runtime.InteropServices;  
publicstructRASCONN  
{  
publicintdwSize;  
publicIntPtrhrasconn;  
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=257)]  
publicstringszEntryName;  
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=17)]  
publicstringszDeviceType;  
[MarshalAs(UnmanagedType.ByValTStr,SizeConst=129)]  
publicstringszDeviceName;  
}  
 
[StructLayout(LayoutKind.Sequential,CharSetCharSet=CharSet.Auto)]  
publicstructRasStats  
{  
publicintdwSize;  
publicintdwBytesXmited;  
publicintdwBytesRcved;  
publicintdwFramesXmited;  
publicintdwFramesRcved;  
publicintdwCrcErr;  
publicintdwTimeoutErr;  
publicintdwAlignmentErr;  
publicintdwHardwareOverrunErr;  
publicintdwFramingErr;  
publicintdwBufferOverrunErr;  
publicintdwCompressionRatioIn;  
publicintdwCompressionRatioOut;  
publicintdwBps;  
publicintdwConnectionDuration;  
}  
[StructLayout(LayoutKind.Sequential,CharSetCharSet=CharSet.Auto)]  
publicstructRasEntryName  
{  
publicintdwSize;  
//[MarshalAs(UnmanagedType.ByValTStr,SizeConst=(int)RasFieldSizeConstants.  
RAS_MaxEntryName+1)]  
publicstringszEntryName;  
//#ifWINVER5  
//publicintdwFlags;  
//[MarshalAs(UnmanagedType.ByValTStr,SizeConst=260+1)]  
//publicstringszPhonebookPath;  
//#endif  
}  
publicclassRAS  
{  
[DllImport("Ra<ahrefahref="http://dev.21tx.com/corp/sap/"target="_blank">SAPa>i32.dll",  
EntryPoint="RasEnumConnectionsA",  
SetLastError=true)]  
 
internalstaticexternintRasEnumConnections  
(  
refRASCONNlprasconn,//buffertoreceiveconnectionsdata  
refintlpcb,//sizeinbytesofbuffer  
refintlpcConnections//numberofconnectionswrittentobuffer  
);  
 
 
[DllImport("rasapi32.dll",CharSetCharSet=CharSet.Auto)]  
internalstaticexternuintRasGetConnectionStatistics(  
IntPtrhRasConn,//handletotheconnection  
[In,Out]RasStatslpStatistics//buffertoreceivestatistics  
);  
[DllImport("rasapi32.dll",CharSetCharSet=CharSet.Auto)]  
publicexternstaticuintRasHangUp(  
IntPtrhrasconn//handletotheRASconnectiontohangup  
);  
 
[DllImport("rasapi32.dll",CharSetCharSet=CharSet.Auto)]  
publicexternstaticuintRasEnumEntries(  
stringreserved,//reserved,mustbeNULL  
stringlpszPhonebook,//pointertofullpathand  
//filenameofphone-bookfile  
[In,Out]RasEntryName[]lprasentryname,//buffertoreceive  
//phone-bookentries  
refintlpcb,//sizeinbytesofbuffer  
outintlpcEntries//numberofentrieswritten  
//tobuffer  
);  
 
[DllImport("wininet.dll",CharSetCharSet=CharSet.Auto)]  
publicexternstaticintInternetDial(  
IntPtrhwnd,  
[In]stringlpszConnectoid,  
uintdwFlags,  
refintlpdwConnection,  
uintdwReserved  
);  
 
publicRAS()  
{  
}  
}  
publicenumDEL_CACHE_TYPE//要删除的类型。  
{  
File,//表示internet临时文件  
Cookie//表示Cookie  
};  
publicclassRASDisplay  
{  
[DllImport("wininet.dll",CharSetCharSet=CharSet.Auto)]  
publicstaticexternboolDeleteUrlCacheEntry(  
DEL_CACHE_TYPEtype  
);  
privatestringm_duration;  
privatestringm_ConnectionName;  
privatestring[]m_ConnectionNames;  
privatedoublem_TX;  
privatedoublem_RX;  
privateboolm_connected;  
privateIntPtrm_ConnectedRasHandle;  
 
RasStatsstatus=newRasStats();  
publicRASDisplay()  
{  
m_connected=true;  
 
RASlpras=newRAS();  
RASCONNlprasConn=newRASCONN();  
 
lprasConn.dwSize=Marshal.SizeOf(typeof(RASCONN));  
lprasConn.hrasconn=IntPtr.Zero;  
 
intlpcb=0;  
intlpcConnections=0;  
intnRet=0;  
lpcb=Marshal.SizeOf(typeof(RASCONN));  
 
 
nRet=RAS.RasEnumConnections(reflprasConn,reflpcb,ref  
lpcConnections);  
if(nRet!=0)  
{  
m_connected=false;  
return;  
}  
if(lpcConnections>0)  
{  
//for(inti=0;i<lpcConnections;i++)  
//{  
RasStatsstats=newRasStats();  
m_ConnectedRasHandle=lprasConn.hrasconn;  
RAS.RasGetConnectionStatistics(lprasConn.hrasconn,stats);  
m_ConnectionName=lprasConn.szEntryName;  
intHours=0;  
intMinutes=0;  
intSeconds=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;  
}  
intlpNames=1;  
intentryNameSize=0;  
intlpSize=0;  
RasEntryName[]names=null;  
entryNameSize=Marshal.SizeOf(typeof(RasEntryName));  
lpSize=lpNames*entryNameSize;  
names=newRasEntryName[lpNames];  
names[0].dwSize=entryNameSize;  
uintretval=RAS.RasEnumEntries(null,null,names,reflpSize,outlpNames);  
//ifwehavemorethanoneconnection,weneedtodoitagain  
if(lpNames>1)  
{  
names=newRasEntryName[lpNames];  
for(inti=0;i<names.Length;i++)  
{  
names[i].dwSize=entryNameSize;  
}  
retval=RAS.RasEnumEntries(null,null,names,reflpSize,outlpNames);  
}  
m_ConnectionNames=newstring[names.Length];  
if(lpNames>0)  
{  
for(inti=0;i<names.Length;i++)  
{  
m_ConnectionNames[i]=names[i].szEntryName;  
}  
}  
}  
publicstringDuration  
{  
get  
{  
returnm_connected?m_duration:"";  
}  
}  
 
publicstring[]Connections  
{  
get  
{  
returnm_ConnectionNames;  
}  
}  
 
publicdoubleBytesTransmitted  
{  
get  
{  
returnm_connected?m_TX:0;  
}  
}  
publicdoubleBytesReceived  
{  
get  
{  
returnm_connected?m_RX:0;  
}  
}  
publicstringConnectionName  
{  
get  
{  
returnm_connected?m_ConnectionName:"";  
}  
}  
publicboolIsConnected  
{  
get  
{  
returnm_connected;  
}  
}  
publicintConnect(stringConnection)  
{  
inttemp=0;  
uintINTERNET_AUTO_DIAL_UNATTENDED=2;  
intretVal=RAS.InternetDial(IntPtr.Zero,Connection,INTERNET_AUTO_DIAL_UNATTENDED,  
reftemp,0);  
returnretVal;  
}  
publicvoidDisconnect()  
{  
RAS.RasHangUp(m_ConnectedRasHandle);  
}  
}
以上介绍C# ADSL自动拨号。
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