Custom Database Class: class database

Class Database
{
PRIVATE:
_ Connectionptr m_pconnection;
_ Commandptr m_pcommand;
_ Recordsetptr m_res;
_ Variant_t rec_affected;
Char m_cconstr [16];
Char m_cusername [32];
Char m_cpassword [32];
Bool m_bopentype;
Public:
Database ();
~ Database ();
Void reopen ();
Bool isopen ();
Bool opendb (char * pcontstr, char * psbname, char * psbpw );
Bool opendb (char * pcontstr );
Bool getdata (char * psqlstr, _ recordsetptr & res );
Bool execute (char * psqlstr );
Bool noneretopen (char * psqlstr );
Bool commandpro (char * pproname );
_ Connectionptr & getconnection ();
Void closedb ();
};

<CPP>
# Import "C:/program files/common files/system/ADO/msado15.dll" no_namespace Rename ("EOF", "endoffile") Rename ("Bof", "firstoffile ")
# Include <objbase. h>
# Include "cdatabase. H"

Database: Database ()
{
Coinitialize (null );
M_pconnection = NULL;
M_pcommand = NULL;
M_pconnection.createinstance (_ uuidof (connection ));
M_res.createinstance (_ uuidof (recordset ));
}

Database ::~ Database ()
{
Closedb ();
If (m_res-> getstate () = adstateopen)
M_res-> close ();
M_res.release ();
M_res = NULL;
M_pconnection.release ();
M_pconnection = NULL;
Couninitialize ();
}

_ Connectionptr & Database: getconnection ()
{
Return m_pconnection;
}

Bool Database: opendb (char * pcontstr, char * psbname, char * psbpw)
{
Try
{
If (m_pconnection-> state)
Return true;
// Open the local access library text. MDB
M_pconnection-> open (_ bstr_t) pcontstr, psbname, psbpw, admodeunknown );
If (m_pconnection-> state! = Adstateopen)
Return false;
M_pconnection-> put_connectiontimeout (long (10); // set timeout
M_pconnection-> put_commandtimeout (long (25 ));

M_pcommand.createinstance (_ uuidof (command ));
M_pcommand-> activeconnection = m_pconnection;
Strcpy (m_cconstr, pcontstr );
Strcpy (m_cusername, psbname );
Strcpy (m_cpassword, psbpw );

M_bopentype = true;
}
Catch (_ com_error E)
{
Return false;
}
Return true;
}

Bool Database: opendb (char * pcontstr)
{
Try
{
If (m_pconnection-> state)
Return true;

M_pconnection-> connectionstring = "file name =. // dbconn. udl ";
M_pconnection-> putconnectiontimeout (10 );
M_pconnection-> putcommandtimeout (25 );

M_pconnection-> open ("", null );

If (m_pconnection-> state! = Adstateopen)
Return false;

M_bopentype = false;
M_pcommand.createinstance (_ uuidof (command ));
M_pcommand-> activeconnection = m_pconnection;
Strcpy (m_cconstr, pcontstr );
}
Catch (_ com_error E)
{
Return false;
}
Return true;
}

Void Database: closedb ()
{
If (m_pconnection = NULL) return;
If (isopen ())
M_pconnection-> close ();
}

Bool Database: Execute (char * psqlstr)
{
If (! Isopen () return false;
Try
{
M_pconnection-> execute (psqlstr, & rec_affected, 0 );
}
Catch (_ com_error E)
{
Return false;
}
Return true;
}

Bool Database: noneretopen (char * psqlstr)
{
If (! Isopen () return false;

If (m_res-> getstate () = adstateopen)
M_res-> close ();
Try
{
M_res-> open (psqlstr, m_pconnection.getinterfaceptr (), adopenforwardonly, adlockreadonly, adcmdtext );
}
Catch (_ com_error E)
{
Return false;
}
Return true;
}

Bool Database: commandpro (char * pproname)
{
If (! Isopen () return false;
Try
{
M_pcommand-> commandtext = pproname;
M_pcommand-> execute (null, null, ad1_text );
}
Catch (_ com_error * E)
{
MessageBox (null, e-> errormessage (), "", mb_ OK );
Return false;
}
Return true;
}
/*
Bool Database: commandpro (char * pproname)
{
If (! Isopen () return false;
Try
{
M_pcommand-> commandtext = pproname;
M_pcommand-> execute (null, null, ad1_text );
}
Catch (_ com_error * E)
{
MessageBox (null, e-> errormessage (), "", mb_ OK );
Return false;
}
Return true;
}
*/

Bool Database: isopen ()
{
Try
{
Return (m_pconnection! = NULL & (m_pconnection-> State & adstateopen ));
}
Catch (_ com_error E)
{
Return false;
}
}

Void Database: reopen ()
{
Try
{
If (m_pconnection-> state! = Adstateopen)
M_pconnection-> open (m_cconstr, m_cusername, m_cpassword, admodeunknown );
}
Catch (_ com_error E)
{
}
}

Bool Database: getdata (char * psqlstr, _ recordsetptr & res)
{
If (! Isopen () return false;

If (res-> getstate () = adstateopen)
Res-> close ();
Try
{
Res-> open (psqlstr, m_pconnection.getinterfaceptr (), adopenforwardonly, adlockreadonly, adcmdtext );
}
Catch (_ com_error E)
{
Return false;
}
Return true;
}