Test SQL Connection String in C++ (WIN32) - c++

Question

I'd like to check a connection string on a SQL 2008 server. Problem is, I have to write the whole thing using C++ (WIN32). Is there any simple way to do this? I've googled it, but it's quite hard, since I don't have much experience with C++.
Any help would be appreciated!

Answer 1

The connection string should be the same regardless of what language you implement with. To simply test the connection string you could do it a .NET language of your choice or whatever else you're familiar with.
Here's a link to a 2-page tutorial that you can use to quickly put a C++ prototype app together that will connect to a db via ADO.
But with .NET, testing a connection can be done in just a few lines of code:
try
{
using (SqlConnection conn = new SqlConnection("connection string here..."))
{
conn.Open();
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
Or you can use a ready-made app like this one to test a connection string.

Answer 2

There is a simple C++ sample here
// SQLConnect_ref.cpp
// compile with: odbc32.lib
#include <windows.h>
#include <sqlext.h>
int main()
{
SQLHENV henv;
SQLHDBC hdbc;
SQLHSTMT hstmt;
SQLRETURN retcode;
SQLCHAR * OutConnStr = (SQLCHAR * )malloc(255);
SQLSMALLINT * OutConnStrLen = (SQLSMALLINT *)malloc(255);
// Allocate environment handle
retcode = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &henv);
// Set the ODBC version environment attribute
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
retcode = SQLSetEnvAttr(henv, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0);
// Allocate connection handle
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
retcode = SQLAllocHandle(SQL_HANDLE_DBC, henv, &hdbc);
// Set login timeout to 5 seconds
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
SQLSetConnectAttr(hdbc, SQL_LOGIN_TIMEOUT, (SQLPOINTER)5, 0);
// Connect to data source
retcode = SQLConnect(hdbc, (SQLCHAR*) "NorthWind", SQL_NTS, (SQLCHAR*) NULL, 0, NULL, 0);
// Allocate statement handle
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
retcode = SQLAllocHandle(SQL_HANDLE_STMT, hdbc, &hstmt);
// Process data
if (retcode == SQL_SUCCESS || retcode == SQL_SUCCESS_WITH_INFO) {
SQLFreeHandle(SQL_HANDLE_STMT, hstmt);
}
SQLDisconnect(hdbc);
}
SQLFreeHandle(SQL_HANDLE_DBC, hdbc);
}
}
SQLFreeHandle(SQL_HANDLE_ENV, henv);
}
}