Visual Studio Qt 5.11.2 SQL Server Express 2017 Driver

[Ovidiu_GCO]

Hello!
I am facing a problem with the ODBC connection. I am trying to connect to my SQL Server Express 2017 Instance, but it seems that i am not able to do it. (There are no errors/warnings).

This is my code:

#include "f1_system.h"
#include <ActiveQt/qaxobject.h>
#include <QtSql/qsqldatabase.h>

F1_System::F1_System(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);

	connect(ui.loginPushButton, SIGNAL(clicked()), this, SLOT(validateLogin()));
}

QString F1_System::connect2DB() {
	QString connectionString = QStringLiteral("Driver={SQL Server Native Client 17.0 };Server=DESKTOP-4K9MAS2\\SQLEXPRESS01;Database=Formula1_BD;Trusted_Connection=yes;");
	QSqlDatabase db = QSqlDatabase::addDatabase("QODBC");
	
	db.setDatabaseName(connectionString);
	if (db.open())
		return QString("Connected");
	else
		return QString("Not Connected!");
	
}

void F1_System::validateLogin() {
	
	ui.label->setText(connect2DB());
}

It keeps changing the text to "Not Connected!".
Could someone let me know what is the problem?

[Later edit]
-- SOLVED --
I solved it by replacing

Driver = {SQL Server Native Client 17.0 }

with

Driver = {SQL Server}

I don't really understand why it is working now, so now I could use some explanations on it. (or, at least, some hints)

Thank you!

[sneubert]

The Driver parameter in the connection string has to exactly match the driver name in ODBC admin drivers page.

Maybe you have some typo. And even this is windows, the name is case sensitive!

[Ovidiu_GCO]

@sneubert Thank you! I undestand now what happened there.

[Andy314]

@Ovidiu_GCO
{SQL Server Native Client 17.0 };
What is with the blank in front of "}"