Can someone help me with the below ADO API? I am a new programmer and am having problems programming a SQL Server connection. I have found various connection strings and continue to run into problems with the syntax. Thank you in advance.
Code:
#include "stdafx.h"
#include <iostream>
#include <string>
#import "C:\Program files\Common Files\System\Ado\msado15.dll" rename("EOF", "ADOEOF")
//---------------------------------------------------------------------------------------------------------------------------------------------
std::string outputashex(unsigned long l)
{
char buffer[1024];
::itoa(l, buffer, 16);
return buffer;
} ;
//---------------------------------------------------------------------------------------------------------------------------------------------
void main()
{
HRESULT hr;
CoInitialize(NULL);
try
{
ADODB::_ConnectionPtr connection;
hr = connection.CreateInstance(__uuidof(ADODB::Connection));
if (FAILED(hr))
{
throw _com_error(hr);
}
//--------------------------------------------------------------------------------------------------------------------------------------------
ADODB::_RecordsetPtr recordset;
hr = recordset.CreateInstance(__uuidof(ADODB::Recordset));
if (FAILED(hr))
{
throw _com_error(hr);
}
//--------------------------------------------------------------------------------------------------------------------------------------------
connection->CursorLocation = ADODB::adUseClient;
//--------------------------------------------------------------------------------------------------------------------------------------------
connection->Open("Provider=sqloledb;Server=.\SQLExpress;AttachDbFilename=c:\Program Files\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\WattsALoan.mdf;Database=WattsALoan;Trusted_Connection=Yes;")
//--------------------------------------------------------------------------------------------------------------------------------------------
//recordset->Open("CREATE TABLE mytable (value NVARCHAR(255))",
//connection.GetInterfacePtr(), ADODB::adOpenForwardOnly,
//ADODB::adLockReadOnly, ADODB::adCmdText);
//--------------------------------------------------------------------------------------------------------------------------------------------
//recordset->Open("INSERT INTO mytable VALUES ('Hello')",
//connection.GetInterfacePtr(), ADODB::adOpenForwardOnly,
//ADODB::adLockReadOnly, ADODB::adCmdText);
//--------------------------------------------------------------------------------------------------------------------------------------------
//recordset->Open("INSERT INTO mytable VALUES ('Goodbye')",
//connection.GetInterfacePtr(), ADODB::adOpenForwardOnly,
//ADODB::adLockReadOnly, ADODB::adCmdText);
//--------------------------------------------------------------------------------------------------------------------------------------------
recordset->Open("SELECT * from Customers",
connection.GetInterfacePtr(),
ADODB::adOpenForwardOnly, ADODB::adLockReadOnly,
ADODB::adCmdText);
//--------------------------------------------------------------------------------------------------------------------------------------------
while(!recordset->ADOEOF)
{
_variant_t var;
var = recordset->Fields->GetItem(L"value")->GetValue();
std::cout << static_cast<char *>(_bstr_t(var.bstrVal))
<< std::endl;
recordset->MoveNext();
};
//--------------------------------------------------------------------------------------------------------------------------------------------
//recordset->Close();
//recordset->Open("DROP TABLE mytable", connection.GetInterfacePtr(),
//ADODB::adOpenForwardOnly, ADODB::adLockReadOnly,
//ADODB::adCmdText);
}
catch(_com_error &e)
{
std::cerr << ::outputashex(hr) << ":"
<< static_cast<char *>(e.Description());
}
catch(...)
{
std::cerr << "Unhandled Exception";
};
}
Linear Mode
