Connecting to MS Access database using C++ using Visual Studio 2008 - c++

Question

I need some serious help trying to connect to an Access database using VS 2008's C++. I have done this in C# but I cant figure this out in C++. I need to use C++ for the connection because I am grabbing data using pre-compiled C++ code. I would really appreciate some help with this. Thanks
I would like to odbc, but if you have another recommendation then I could change my mind.I am trying to connect to an Access database, the Northwind sample database, by following this example,
http://msdn.microsoft.com/en-us/library/cc811599.aspx
I am using a Windows 7 OS with Visual C++ 2008 for the compiler and IDE. The program is a console application. This example is specified for Access 2007 .accdb file types. Once I get it running correctly I will switch the path name, queries, and table names to my database. Below is the code that fails to build. I don't know what is causing this:
Includes-->
fstream
cmath
complex
iostream
iomanip
vector
limits
stdlib.h
stdio.h
time.h
fcntl.h
string.h
ctype.h
icrsint.h
using namespace std;
#import C:\\Program Files\\Common Files\\system\\ado\\msado15.dll rename("EOF",
"AdoNSEOF")
_bstr_t bstrConnect="Provider=Microsoft.ACE.OLEDB.12.0;Data "
"Source=C:\\Users\\lriley\\Documents\\Northwind 2007.mdb;";
HRESULT hr;
int main()
{
::CoInitialize(NULL);
const char* DAM = "ADO";
ADODB::_ConnectionPtr pConn("ADODB.Connection");
hr = pConn->Open(bstrConnect, "admin", "", ADODB::adConnectUnspecified);
if(SUCCEEDED(hr))
{
cout<<DAM<<": Successfully connected to database. Data source name:\n "
<<pConn->GetConnectionString()<<endl;
// Prepare SQL query
_bstr_t query = "SELECT Customers.[Company], Customers.[First Name] FROM "
"Customers;";
cout <<DAM<<": SQL query \n "<<query<<endl;
// Execute
ADODB::_RecordsetPtr pRS("ADODB.Recordset");
hr = pRS->Open(query,
_variant_t((IDispatch *) pConn, true),
ADODB::adOpenUnspecified,
ADODB::adLockUnspecified,
ADODB::adCmdText);
if(SUCCEEDED(hr))
{
cout<<DAM<<": Retrieve schema info for the given result set: "<< endl;
ADODB::Fields* pFields = NULL;
hr = pRS->get_Fields(&pFields);
if(SUCCEEDED(hr) && pFields && pFields->GetCount() > 0)
{
for(long nIndex=0; nIndex < pFields->GetCount(); nIndex++)
{
cout << " | "<<_bstr_t(pFields->GetItem(nIndex)->GetName());
}
cout << endl;
}
else
{
cout << DAM << ": Error: Number of fields in the " <<
"result is set to zero." << endl;
}
cout<<DAM<<": Fetch the actual data: " << endl;
int rowCount = 0;
while (!pRS->AdoNSEOF)
{
for(long nIndex=0; nIndex < pFields->GetCount(); nIndex++)
{
cout<<" | "<<_bstr_t(pFields->GetItem(nIndex)->GetValue());
}
cout<< endl;
pRS->MoveNext();
rowCount++;
}
cout<<DAM<<": Total Row Count: " << rowCount << endl;
}
pRS->Close();
pConn->Close();
cout<<DAM<<": Cleanup Done" << endl;
}
else
{
cout<<DAM<<" : Unable to connect to data source: "<<bstrConnect<<endl;
}
::CoUninitialize();
return 0;
}
I recieve the following error when I try to build it:
fatal error C1010: unexpected end of file while looking for precompiled header. Did you forget to add #include "stdafx.h" to your source?
c:\users\lriley\documents\visual studio 2008\projects\test12\test12\test12.cpp
Any help would be appreciated.
Thanks
Dante

Answer 1

Well, it's been a while, but you are going to need something like: http://msdn.microsoft.com/en-us/library/ms714562%28v=vs.85%29.aspx, look at SQLConnect..., a lot of variations to a theme, but the 2nd parameter is basically the path to your access db (*.mdb) file.
good luck.

Answer 2

You just have to give in file properties *. Cpp
-> Precompiled Header-No Precompiled Headers
Use precompiled header file - Stdafx.h xxxx