这是MSDN中返回多个纪录集的代码
_bstr_t strCnn("Provider=sqloledb;Data Source=MyServer;"
"Initial Catalog=pubs;User Id=sa;Password=;"); try
{
// Open recordset from Authors table.
TESTHR(pRstCompound.CreateInstance(__uuidof(Recordset))); // Pass the Cursor type and Lock type to the Recordset.
pRstCompound->Open("SELECT * FROM authors; SELECT * FROM stores;"
"SELECT * FROM jobs", strCnn, adOpenForwardOnly,
adLockReadOnly, adCmdText); // Display results from each SELECT statement.
int intCount = 1;
while(!(pRstCompound==NULL))
{
printf("\n\nContents of recordset #%d\n", intCount); while(!pRstCompound->EndOfFile)
{
index.iVal = 0;
printf("%s\t", (LPCSTR)(_bstr_t)pRstCompound->\
GetFields()->GetItem(& index)->Value);
index.iVal = 1;
printf("%s\n", (LPCSTR)(_bstr_t)pRstCompound->\
Fields->GetItem(& index)->Value);
pRstCompound->MoveNext();
int intLine = intLine + 1;
if (intLine % 22 == 0)
{
printf("\nPress any key to continue...");
getch();
//Clear the screen for the next display.
system("cls");
}
}
long lngRec = 0;
pRstCompound = pRstCompound->NextRecordset((VARIANT *)lngRec);
printf("\nPress any key to continue...");
getch();
intCount = intCount + 1;
}
} catch(_com_error &e)
{
// Notify the user of errors if any.
// Pass a connection pointer accessed from the Recordset.
_variant_t vtConnect = pRstCompound->GetActiveConnection(); // GetActiveConnection returns connect string if connection
// is not open, else returns Connection object.
switch(vtConnect.vt)
{
case VT_BSTR:
PrintComError(e);
break;
case VT_DISPATCH:
PrintProviderError(vtConnect);
break;
default:
printf("Errors occured.");
break;
}
}
这里边没有关闭的代码,有那位高手指点一下这有没有问题
_bstr_t strCnn("Provider=sqloledb;Data Source=MyServer;"
"Initial Catalog=pubs;User Id=sa;Password=;"); try
{
// Open recordset from Authors table.
TESTHR(pRstCompound.CreateInstance(__uuidof(Recordset))); // Pass the Cursor type and Lock type to the Recordset.
pRstCompound->Open("SELECT * FROM authors; SELECT * FROM stores;"
"SELECT * FROM jobs", strCnn, adOpenForwardOnly,
adLockReadOnly, adCmdText); // Display results from each SELECT statement.
int intCount = 1;
while(!(pRstCompound==NULL))
{
printf("\n\nContents of recordset #%d\n", intCount); while(!pRstCompound->EndOfFile)
{
index.iVal = 0;
printf("%s\t", (LPCSTR)(_bstr_t)pRstCompound->\
GetFields()->GetItem(& index)->Value);
index.iVal = 1;
printf("%s\n", (LPCSTR)(_bstr_t)pRstCompound->\
Fields->GetItem(& index)->Value);
pRstCompound->MoveNext();
int intLine = intLine + 1;
if (intLine % 22 == 0)
{
printf("\nPress any key to continue...");
getch();
//Clear the screen for the next display.
system("cls");
}
}
long lngRec = 0;
pRstCompound = pRstCompound->NextRecordset((VARIANT *)lngRec);
printf("\nPress any key to continue...");
getch();
intCount = intCount + 1;
}
} catch(_com_error &e)
{
// Notify the user of errors if any.
// Pass a connection pointer accessed from the Recordset.
_variant_t vtConnect = pRstCompound->GetActiveConnection(); // GetActiveConnection returns connect string if connection
// is not open, else returns Connection object.
switch(vtConnect.vt)
{
case VT_BSTR:
PrintComError(e);
break;
case VT_DISPATCH:
PrintProviderError(vtConnect);
break;
default:
printf("Errors occured.");
break;
}
}
这里边没有关闭的代码,有那位高手指点一下这有没有问题
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